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GENERAL SUSPENSION
FORK MANUAL
Overview………………………………………………………………………………………………….……….2
Important safety information…………………………………..…………………………….…………2
Before every ride…………….…………………………………………………………………………………3
Fork assembly……………….………………………………………………………………………..……..….3
Tire clearance test……………………………………………………………………………………………4
Tire clearance……………….……………………………………….…………………………………………..4
Suggested tire size……………………………………………………………………………………….…5-6
Maximum brake rotor size………………………………………………………………………………7
Q-LOC assembly………………….………………………………………………………….…………….……8
LH Thru axle assembly….………………………………………………………………………….……9
20mm bolted thru axle assembly…….…………………………………..…………………………10
20mm cross thru axle assembly………………………………………………………………….……10
15AH2/12AH2bolted thru axle assembly…………………………………………………………11
Setting SAG…………………………………………………………………………………………………….12
Air pressure adjust…….……………………………………………………………….……………………13
Air volume adjust………….……………………………………………………...…………………………14
Coil spring preload.…………………..………………………….………………..………….15
Maintenance of the fork………………..............……………………………………………………15
Intended use……..……………….......................………………………………………………………16
ENGLISH
Carefully read, understand and follow the instructions provided in this
manual, and keep it in a safe place for future reference. If you have any
doubt whatsoever regarding the use or maintenance of any SR
SUNTOUR product, please contact SR SUNTOUR. Failure to follow these
warnings and instructions can result in product malfunction, causing an
accident, severe injury or death.
WARNING !
We have language options for Chinese, Dutch, English, French,
German, Italian, Japanese and Spanish on our website. Please scan
the QR code here to navigate to:
www.srsuntour-cycling.com > Service > Download area > Consumer
Downloads > Bike > Owners manuals > General Fork Manual
Failure to follow all warnings and safety instructions can cause your product to malfunction,
resulting in an accident, severe personal injuries or even death to the rider.
WARNING !
ØRead this manual thoroughly before using your
suspension system.
ØThese instructions contain important information about
the correct installation, service and maintenance of your
suspension fork. Common mechanical knowledge may
not be sufficient. Your suspension fork should only be
installed, serviced and/or maintained by a trained and
qualified bicycle mechanic with specialized tools.
ØOur suspension systems contain fluids and gases under
extreme pressure. Never try to open any SR SUNTOUR
suspension system! Pieces can be violently ejected.
ØSR SUNTOUR suspension forks are designed as a single
integrated system. To avoid product malfunction and an
accident, use only genuine SR SUNTOUR spare parts. The
use of third-party supplier spare parts also voids the
warranty of your suspension system.
ØYour suspension fork is not intended for jumps,
aggressive downhill rides, freeride or dirt jumping if the
warning sticker on your suspension system prohibits
these activities. Disregarding these instructions may
cause your suspension fork to fail, resulting in an
accident, personal injury or death, and will void the
warranty.
ØSR SUNTOUR suspension fork is designed for use by a
single rider.
ØSelect the correct suspension fork according to your
frame’s dimensions and your personal riding style.
Installing a suspension fork which does not match the
geometry of your frame could result into a failure of the
suspension fork or frame itself, and will void the shocks
warranty.
failure of the suspension fork or frame itself, and
will void the shocks warranty.
ØKnow the limits of your skill and experience, and never
ride beyond them.
ØRead, understand and follow all owner’s manuals
provided with your bike and all of its components.
ØAlways be equipped with proper safety gear. This
includes a properly fitted and fastened helmet.
According to your riding style you should use additional
safety protection. Make sure your equipment is in
flawless condition.
ØEven if you had a suspension system in the past, ride
carefully and slowly to become accustomed to the feel of
your new suspension fork.
ØSR SUNTOUR suspension forks are not equipped with
front reflectors for use on public roads. If you intend to
use your bicycle on public roads or bicycle paths, you
must install the required front reflectors. Please contact
your dealer.
ØIf you are using a bicycle rack that requires the front
wheel to be removed, carefully insert and remove the
dropouts from the bike rack. Do not bend the dropouts !
ØIf you are using a bicycle rack that fastens the bicycle at
the front dropouts only, then the rear wheel must be
securely fastened to prevent movement of the rear
wheel. Movement of the rear wheel will damage the
front dropouts, and this damage may not be visible to
you.
ØIf the bicycle has fallen off the bicycle rack, have it
inspected by a qualified bicycle mechanic before riding it
again.
2
Disc brake mount
For more
information check
page 7
Disc
brake
mount
PM 8”
IMPORTANT SAFETY INFORMATION
OVERVIEW
BEFORE EVERY RIDE
Avoid serious personal injury or even death. Do not ride the bicycle if any of the following
criteria is not met! Correct any condition before you ride.
WARNING !
ØInspect your bicycle and suspension system including
the handlebars, pedals, crank arms, seat post, saddle,
etc. for any cracks, dents, bent or tarnished parts. Also
search for any oil leaking out of your shocks. Be sure to
check hidden areas on the underside of your bike. If any
condition exists, consult a trained and qualified bicycle
mechanic to determine the cause and make any
necessary correction.
ØCompress your suspension system with your body
weight. If it feels too soft, make the necessary
adjustments until you have reached the correct SAG
value. Please also see the instruction in this manual
regarding SAG.
ØMake sure your brakes are properly installed/adjusted
and work correctly.
ØSpin the wheels. Make sure that wheels are perfectly
centered and do not contact the suspension fork or
brakes.
ØIf you are using a quick release system to fasten your
wheel set, make sure that all levers and nuts are
properly tightened. In case you are using a through axle
system, make sure that all fixing bolts are tightened with
the appropriate torque values. Strictly follow the
instructions provided by the manufacturer of the quick
release or through axle system.
ØCheck the cable length and routing of your components.
Make sure they do not interfere with your steering of
the bicycle.
ØIf you are using reflectors for on-road cycling, make sure
they are clean and properly installed.
ØCheck mounting hardware of all components to make
sure everything is tightened.
ØBounce your bike on the ground while looking and
listening for anything which might be loose.
FORK ASSEMBLY
Avoid product malfunction, an accident, personal injury or death. Your new SR SUNTOUR
suspension fork should be installed, maintained and serviced by a qualified and trained bicycle
mechanic. Avoid product failure and an accident, personal injury or death. All mounting screws
must be tightened with the respective torques specified by the manufacturer of each individual
component (i.e., brake, headset, etc.).
WARNING !
1. Remove the old fork from your bicycle. Remove the headset crown race from the fork.
2. Measure the length of the steerer tube of your old fork and compare it to the length of the steerer tube of the SR
SUNTOUR fork. The standard length of SR SUNTOUR suspension fork steerer tube is 255mm. It may be necessary
to shorten the steerer tube to the correct length.
3. Install the fork crown race firmly at the top of your fork crown. Reattach the fork assembly (headset, spacer,
handlebar stem) to the bicycle. Adjust the headset until no more play is observed. Further information can be
found in the installation instructions of the headset manufacturer.
You can use the following formula to determine the proper length of the steerer tube: Head tube of the frame
+ Headset height + Spacer if applicable + Height of the stem -3 mm distance = Length of the steerer tube
4. Install and properly adjust the brakes according to the brake manufacturer’s instructions. If you are using a disc
brake, install the brake only into the designated threaded receptacle hole for the disc brake. Use only cantilever
brakes that are made for use without reinforcing brace. Follow the assembly instructions of your brake
manufacturer. Select the proper length for the brake cable so that it does not interfere with the fork or steering.
5. Reattach the front wheel. Make sure that all clamping levers and nuts are set and tightened properly (at least
four threads must engage in the adjusting nut when the quick release is locked). If the fork is equipped with a
thru-axle system, then all screws must be checked for proper torque. Follow the instructions of the Quick
Release or Turn-Axle manufacturer.
3
4
TIRE CLEARANCE TEST
1. Depressurize the fork. (if equipped with air suspension)
2. Compress the fork all the way.
3. Measure the distance between the top of your tire and the underside of the fork crown. The distance
must not be less than 10 mm! If the tire is too big, it will touch the underside of the crown when the
fork is fully compressed.
4. Relieve the fork and pump it up again if it is an air fork.
5. Take into account that the gap is reduced if you are using a fender! Repeat the “tire clearance test” to
ensure that the distance is sufficient. You must repeat this test every time you change your tires to
another size!
TIRE CLEARANCE
Below dimensions are based on the bottom case type. Some numbers are referred based on the bottom
case type which have fender mount interface, and some are without. Please check in advance whether the
wheel and fork are compatible. The necessary information can be found on the side of the tire. Every tire
has a different external diameter (width and height of the tire). For this reason, check the distance
between your tire and the fork to make sure your tire does not touch the fork under any circumstances.
Bear in mind that the narrowest part of the fork is at the brake boss level. If you want to remove your
wheel, you must release the air from your tire, among other things, in order to fit it through the brake boss
level.
Using a tire that is larger than the maximum tire size allowed for your fork is very dangerous
and can cause accidents, serious injuries and even death. Inadequate tire clearance will result
in sudden and unexpected loss of bicycle control, an accident, personal injury or death.
WARNING !
5
SUGGESTED TIRE SIZE
Fork model Stanchion
size
Suggested tire
size Max tire width
Max. tire outer diameter
(O.D.)
(* Note below)
RUX38 29" BT
38mm 29" x 2.8" 73mm 770mm
RUX38 27.5" BT
38mm 27.5" x 2.8" 73mm 732mm
DUROLUX38 29" BT
38mm 29" x 2.6" /
27.5" x 2.8" 63mm 756mm
DUROLUX36 29" BT
36mm 29" x 2.6" /
27.5" x 2.8" 63mm 756mm
DUROLUX36 27.5" BT
36mm 27.5" x 2.6" 63mm 723mm
AURON35 29" BT
35mm 29" x 2.4" /
27.5" x 2.8" 63mm 756mm
AURON35 27.5" BT
35mm 27.5" x 2.8" 73mm 737mm
AION35 29" BT
35mm 29" x 2.4" /
27.5" x 2.8" 63mm 756mm
AION35 27.5" BT
35mm 27.5" x 2.8" 73mm 737mm
ZERON35 29" BT
35mm 29" x 2.4" /
27.5" x 2.8" 63mm 756mm
ZERON35 27.5" BT
35mm 27.5" x 2.8" 73mm 737mm
AXON34
-werx 29" BT 34mm 29" x 2.4" 63mm 756mm
AXON34
-elite 29" BT 34mm 29" x 2.4" 63mm 756mm
AXON34 29" BT
34mm 29" x 2.4" 63mm 760mm
AXON34 27.5" BT
34mm 27.5" x 2.6" 67mm 725mm
AXON32 29" BT
32mm 29" x 2.4" 63mm 756mm
AXON32 27.5" BT
32mm 27.5" x 2.5" 66mm 724mm
EPIXON 29"
32mm 29" x 2.25" 58mm 754mm
EPIXON 27.5"
32mm 27.5" x 2.25" 58mm 710mm
EPIXON 26"
32mm 26" x 2.25" 58mm 684mm
RAIDON34 29" BT
34mm 29" x 2.4" 63mm 760mm
RAIDON34 27.5" BT
34mm 27.5" x 2.6" 67mm 725mm
RAIDON32 29" BT
32mm 29" x 2.4" 63mm 756mm
RAIDON32 27.5" BT
32mm 27.5" x 2.5" 66mm 724mm
RAIDON32 29"
32mm 29" x 2.25" 58mm 754mm
RAIDON32 27.5"
32mm 27.5" x 2.25" 58mm 710mm
RAIDON32 26"
32mm 26" x 2.25" 58mm 684mm
XCR34 29" BT
34mm 29" x 2.4" 63mm 760mm
XCR34 27.5" BT
34mm 27.5" x 2.6" 67mm 725mm
XCR32 29" BT
32mm 29" x 2.4" 63mm 756mm
XCR32 27.5" BT
32mm 27.5" x 2.5" 66mm 724mm
XCR32 29"
32mm 29" x 2.25" 58mm 754mm
XCR32 27.5"
32mm 27.5" x 2.25" 58mm 710mm
XCR32 26"
32mm 26" x 2.25" 58mm 684mm
XCR 24"
32mm 24" x 2.1" 54mm 624mm
X1 29"
32mm 29" x 2.25" 58mm 754mm
X1 27.5"
32mm 27.5" x 2.25" 58mm 710mm
XCM34 29 BT
34mm 29" x 2.4" 63mm 756mm
XCM34 27.5 BT
34mm 27.5" x 3.0" 78mm 740mm
XCM32 29" BT
32mm 29" x 2.4" 63mm 752mm
XCM32 27.5" BT
32mm 27.5" x 2.6" 67mm 730mm
XCM 24" BT
30mm 24" x 2.8" 73mm 678mm
XCM32 29"
32mm 29" x 2.4" 63mm 758mm
XCM32 27.5"
32mm 27.5" x 2.25" 58mm 714mm
XCM 29"
30mm 29" x 2.4" 63mm 758mm
XCM 27.5"
30mm 27.5" x 2.25" 58mm 714mm
XCM 26"
30mm 26" x 2.25" 58mm 688mm
XCM
-JR. 20" 28mm 20" x 2.1" 56mm 526mm
6
XCT30 29"
30mm 29" x 2.25" 58mm 750mm
XCT30 27.5"
30mm 27.5" x 2.25" 58mm 714mm
XCT L24"
28mm 24" x 2.1" 54mm 628mm
XCT 20” plus
28mm 20" x 2.8" 73mm 554mm
XCT L20"
28mm 20" x 2.1" 56mm 526mm
XCT 24"
25.4mm 24" x 2.1" 54mm 628mm
XCT 20"
25.4mm 20" x 2.1" 56mm 526mm
XCE28 29"
28mm 29" x 2.25" 58mm 750mm
XCE28 27.5"
28mm 27.5" x 2.25" 58mm 714mm
XCE28 26"
28mm 26" x 2.1" 54mm 680mm
MOBIE35 29" BT
35mm 29" x 2.4" /
27.5" x 2.8" 70mm 758mm
MOBIE35 27.5" BT
35mm 27.5" x 2.8" 70mm 730mm
MOBIE34 700C
34mm 700C x 57C 62mm 753mm
MOBIE34 27.5"
34mm 27.5" x 2.4" 63mm 717mm
MOBIE45 700C
34mm 700C x 57C 59mm 751mm
MOBIE45 27.5"
34mm 27.5" x 2.4" 63mm 717mm
MOBIE25 700C
32mm 700C x 57C 59mm 751mm
MOBIE25 27.5"
32mm 27.5" x 2.4" 63mm 717mm
MOBIE
-A32 29" 32mm 29" x 2.4" 63mm 760mm
MOBIE
-A32 27.5" 32mm 27.5" x 2.4" 63mm 717mm
XCR32
-ATB 29" 32mm 29" x 2.4" 64mm 758mm
XCR32
-ATB 27.5" 32mm 29" x 2.4" 64mm 718mm
XCM32
-ATB 29" 32mm 29" x 2.4" 63mm 760mm
XCM32
-ATB 27.5" 32mm 27.5" x 2.4" 63mm 717mm
MOBIE34 CGO 20"
34mm 20" x 2.6" 65mm 540mm
MOBIE
-A32 CGO 20" 32mm 20" x 2.25" 58mm 530mm
GVX32 700C
32mm 700C x 45C 50mm 722mm
NRX32
-15 700C 32mm 700C x 48C 50mm 722mm
NRX30 700C
30mm 700C x 48C 50mm 722mm
NVX30 29"
30mm 29" x 2.4" 63mm 760mm
NVX30 700C
30mm 700C x 52C 54mm 738mm
NVX30 27.5"
30mm 27.5" x 2.4" 63mm 717mm
NCX30 700C
30mm 700C x 48C 50mm 722mm
TR
-HSi 700C 30mm 700C x 52C 54mm 738mm
NX1 700C
30mm 700C x 48C 50mm 722mm
NEX
-E25 700C 30mm 700C x 52C 54mm 738mm
NEX
-E25 26" 30mm 26" x 2.1" 54mm 678mm
NEX 700C
28mm 700C x 48C 50mm 738mm
NEX 26"
28mm 26" x 2.1" 54mm 678mm
M3010
-700C 25.4mm 700C x 52C 54mm 742mm
M3010
-26" 25.4mm 26" x 2.1" 54mm 684mm
M3010
-24" 25.4mm 24" x 2.1" 54mm 630mm
M3010
-20" 25.4mm 20" x 2.1" 56mm 526mm
CR85
-E25 700C 30mm 700C x 48C 50mm 722mm
CR85
-E25 26" 30mm 26" x 2.1" 54mm 684mm
* Note: Some of above dimensions are referred based on "with fender mount interface", and some are without. Please
check the specification sheet for more details.
7
MAXIMUM BRAKE ROTOR SIZE
Fork model Stanchion size
Rotor size when disc caliper
mounted directly Max. rotor size
RUX38 29"/ 27.5" BT
38mm 203mm 220mm
DUROLUX38 29" BT
38mm 203mm 220mm
DUROLUX36 29"/ 27.5" BT
36mm 180mm 220mm
AURON35 29"/ 27.5" BT
35mm 180mm 203mm
AION35
-EVO 29"/ 27.5" BT 35mm 180mm 203mm
ZERON35 29"/ 27.5" BT
35mm 180mm 203mm
AXON34
-werx 29" BT 34mm 160mm 180mm
AXON34
-elite 29" BT 34mm 160mm 180mm
AXON34 29"/ 27.5" BT
34mm 180mm 203mm
AXON32 29"/ 27.5" BT
32mm 160mm 180mm
EPIXON 29"/ 27.5"/ 26"
32mm 160mm 180mm
RAIDON34 29"/ 27.5" BT
34mm 180mm 203mm
RAIDON32 29"/ 27.5" BT
32mm 160mm 180mm
RAIDON32 29"/ 27.5"/ 26"
32mm 160mm 180mm
XCR34 29"/ 27.5" BT
34mm 180mm 203mm
XCR32 29"/ 27.5" BT
32mm 160mm 180mm
XCR32 29"/ 27.5"/ 26"
32mm 160mm 180mm
XCR 24"
32mm 160mm 180mm
X1 29"/ 27.5"
32mm 160mm 180mm
XCM34 29"/ 27.5" BT
34mm 160mm 203mm
XCM32 29"/ 27.5" BT
32mm 160mm 180mm
XCM32 29"/ 27.5"
32mm 160mm 180mm
XCM 24" BT
30mm 160mm 180mm
XCM
-JR. 20" 30mm 160mm 180mm
XCM30 29"/ 27.5"/ 26"
30mm 160mm 180mm
XCT30 29"/27.5"
30mm 160mm 180mm
XCT28 L24"
28mm 160mm 180mm
XCT 20” plus
30mm 160mm 180mm
XCT L20"
30mm 160mm 180mm
XCT 24"/ 20"
25.4mm 160mm 180mm
XCE28 29"/ 27.5"/ 26"
28mm 160mm 180mm
MOBIE35 29" / 27.5" BT
35mm 180mm 203mm
MOBIE34 700C / 27.5"
34mm 180mm 203mm
MOBIE45 700C / 27.5"
34mm 160mm 203mm
MOBIE25 700C / 27.5"
32mm 160mm 180mm
MOBIE
-A32 29"/ 27.5" 32mm 160mm 180mm
XCR32
-ATB 29"/ 27.5" 32mm 160mm 180mm
XCM32
-ATB 29"/ 27.5" 32mm 160mm 180mm
MOBIE34 CGO 20"
34mm 180mm 203mm
MOBIE
-A32 CGO 20" 32mm 160mm 180mm
GVX32 700C
32mm 160mm 180mm
NRX32
-15 700C 32mm 160mm 180mm
NRX30 700C
30mm 160mm 180mm
NVX30 29"/ 700C / 27.5"
30mm 160mm 180mm
NCX30 700C
30mm 160mm 180mm
NCX28 26"
28mm 160mm 180mm
TR
-HSi 700C 30mm 160mm 180mm
NX1 700C
30mm 160mm 180mm
NEX
-E25 700C / 26" 30mm 160mm 180mm
NEX 700C / 26"
28mm 160mm 180mm
M
-series 25.4mm 160mm 180mm
8
Q-LOC ASSEMBLY
1. Check the
segmented flange
to be expanded
before
installation and
open the lever
completely.
2. Slide in the axle
until it "clicks".
Make sure the
segmented flange
is expanded.
1. Open the lever
completely.
2. Press adjust nut
until segmented
flange retracts.
3. Open the lever
completely. Turn
nut clockwise
until flange stays
latched.
4. Pull out the axle.
3. Set the tension of
the nut until the
flange is flush
with the dropout.
4. Close the lever
completely.
Check if it’s firmly
seated. Re-
tighten the nut if
necessary.
LH THRU AXLE ASSEMBLY
2. Turn the lever clockwise
to tighten the axle until it
stops. Do not turn with a
torque greater than 10Nm.
1. After turning the adjust nut
towards “+” direction until it
stops, put the wheel in the
fork and insert the axle with
the lever in the open position.
3. Move the lever counter-
clockwise so that it points at
the ground. Loosen the adjust
nut towards ( -) direction
until the lever starts to get
tight at the half-way point.
Suggested tightening force:
80-120N
4. Close the lever all the way. It
should leave an impression
in the palm of the
hand. ”CLOSE” should face
towards outside as shown in
4.
4
1. Open the lever.
3. Remove the axle from the
fork.
2. Turn the axle counter-
clockwise.
3
ASSEMBLY
1
3
REMOVAL
1
2
2
9
10
20MM BOLTED THRU AXLE ASSEMBLY
1. Slide in the axle and tighten
it with a 6mm Allen wrench
by suggested tightening
torque of 10Nm.
2. Tighten the safety clamp
with a 4mm Allen wrench
by suggested tightening
torque of 7Nm.
20MM CROSS THRU AXLE ASSEMBLY
1. Slide in the axle
on the quick-lock
side.
2. Tighten the axle
with the red
lever.
3. It is possible to
slide the lever
into the axle now.
4. Lock the quick
release.
5. Set the
tensioning force
with a 4 mm
Allen wrench if
needed.
6. The lever should
be flush to the
bottom case.
11
15AH2/12AH2 BOLTED THRU AXLE ASSEMBLY
Note: Before installation, make sure to check the o-ring is correctly seated at the thread part.
1. Fully insert the axle on the
drive-side.
2. Tighten the axle with a
6mm Allen wrench by the
suggested tightening
torque of 8-10Nm.
3. Check the axle’s thread. It
must be visible.
1. Loosen the axle on the
drive side with a 6mm.
2. Pull out the axle.
12
SETTING “SAG”
To achieve the best performance from your SR SUNTOUR suspension air spring forks, adjust the air
pressure to attain your proper sag setting. Sag is the amount your suspension compresses under your
weight and riding gear and luggage. Sag range should be set of total fork travel. Make sure to set sag with
the compression knob in the OPEN position.
ØBelow chart is the suggested SAG range and the original air pressure chart, set for the SR SUNTOUR air
suspension forks from the factory. Remember that these are the starting points. Adjustments will vary
based on rider ability, trail conditions, frame design, and personal preference. After setting up your
suspension fork, check your sag to make sure that you are within the recommended SAG settings.
ØThe SAG is the compression which is caused by the rider’s weight including equipment (such as
backpack), seating position and the frame’s geometry and not as a result of riding. Every rider has a
different weight and seating position. Therefore, the front fork will sag more or less. To assure a
proper function of suspension front fork and not to interfere its performance, setting a proper SAG is
the important way to find the correct air pressure for your air suspension fork.
Fork travel SAG (%) SAG (mm)
200 -180mm 30 -35% 70 -54mm
180 -160mm 25 -30% 54 -40mm
160 -140mm 20 -25% 40 -28mm
140 -120mm 20 -25% 35 -24mm
120 -100mm 15 -20% 24 -15mm
100 -80mm 15 -20% 20 -12mm
80 -63mm 10 -15% 12 -6mm
Setting tip for EQ air forks
ØStep 1: Pump up to the suggested air pressure and compress the fork at least 50% of full travel several
times in order to equalize the air pressure between the positive and negative air chamber.
ØStep 2: Sit on the bike with equipment (such as backpack) and ask somebody to hold the bike, stand on
the pedals, and compress the fork several times. Then sit on your bike in your normal riding position.
ØStep 3: Slide the SAG indicator O-ring down to the top of the dust seal.
ØStep 4: Gently step off the bike without compressing the fork furthermore.
ØStep 5: Check the O-ring position to see if the SAG setting is properly done.
ØStep 6: In case if the SAG setting is not properly done, air pressure must be adjusted.
In order to increase the SAG, decrease the air pressure.
In order to decrease the SAG, increase the air pressure.
üRepeat the above procedure until you can find the correct SAG setting.
13
AIR PRESSURE ADJUST
The suggested settings in this manual are designed to be a starting point, in order to get you on
your first ride in as simple as possible. For more details, consult a qualified and trained bicycle
mechanic at your bike shop to get proper advice.
As you ride and getting used to your fork, adjust the settings as needed.
WARNING !
Rider weight
(kg)
Suggested air pressure (psi)
<EQ air system forks>
RUX38 / DUROLUX38
DUROLUX36 / AURON35
/ MOBIE35 AXON34-werx / elite
< 55 < 40 35 -50 40 -55
55 -65 40 -50 50 -60 55 -65
65 -75 50 -60 60 -70 65 -75
75 -85 60 -70 70 -85 75 -85
85 -95 70 -85 85 -105 85 -100
95 < 85 + 105 + 100 +
Air pressure (factory setting) 70psi 90psi 95psi
Max. pressure 105psi 120psi 145psi
Rider
(kg)
Suggested air pressure (psi)
<Air system forks>
AION35-
EVO /
ZERON35
AXON34 /
RAIDON34
/ XCR34-
air
AXON32 /
EPIXON32 /
RAIDON32
/ XCR32
-
air
XCR 24"
air
XCM
-
Jr.-
air
MOBIE34
-air /
MOBIE45
-air
Mobie25
-air GVX32
NRX
-
air
NCX
-
air
< 55 35 -50 40 -55 40 -55 40 -55 40 -55 35 -50 40 -55 40 -55 40 -55 40 -55
55 -65 50 -60 55 -65 55 -65 50 -60 55 -65 55 -65 55 -65 55 -65
65 -75 60 -70 65 -75 65 -75 60 -70 65 -75 65 -75 65 -75 65 -75
75 -85 70 -85 75 -85 75 -85 70 -85 75 -85 75 -85 75 -85 75 -85
85 -95
85
-
105
85
-
100
85
-
100
85
-
105
85
-
100
85
-
100
85
-
100
85
-
100
95 < 105 + 100 + 100 + 105 + 100 + 100 + 100 + 100 +
Air
setting)
90psi 95psi 110psi 50psi 50psi 90psi 100psi 110psi 85psi 80psi
Max.
pressure 120psi 145psi 145psi 100psi 100psi 120psi 130psi 120psi 120psi 120psi
Note:
Above numbers are for reference only. The correct air pressure must be adjusted by individual rider while
checking the SAG.
14
AIR VOLUME ADJUST
Additional tuning options: Air Volume Adjust Spacers
Changing air volume spacers in some fork models is an easy internal adjustment that allows you to change
the amount of mid stroke and bottom out resistance.
Even if you have set your sag, but using full travel (bottoming out) too easily, then you could install one or
more spacers to increase the bottom out resistance.
Even if you have set your sag, but still not using full travel, then you could remove one or more spacers to
decrease the bottom out resistance.
Installation procedure and tuning options can be suggested as shown in the below chart.
EQ air system forks
Number of Air volume spacers (rubber clip type)
RUX38 DUROLUX38 DUROLUX36 AURON35 MOBIE35 AXON34-werx
Resin spacer
volume
8.6cc 8.2cc 7.5cc
Rubber spacer
volume
7.5cc-15mm 7.5cc-15mm 5cc-10mm 5cc-10mm 5cc-10mm
Factory
setting
Max.
possible
spacers
Factory
setting
Max.
possible
spacers
Factory
setting
Max.
possible
spacers
Factory
setting
Max.
possible
spacers
Factory
setting
Max.
possible
spacers
Factory
setting
Max.
possible
spacers
Resin spacer
553333
Rubber spacer
Travel
200mm
180mm
2616
170mm
3626
160mm
4636710 711
150mm
46810 811
140mm
910 911
130mm
10 11
120mm
11 11 3 8
110mm
3 8
100mm
3 8
Air system forks
Number of Air volume spacers (rubber clip type)
AION35 ZERON35 AXON32 MOBIE34-air MOBIE45-air GVX
Rubber
spacer
volume
5cc 5cc 4.3cc 5cc 5cc 4.3cc
Travel
Factory
setting
Max.
possible
spacers
Factory
setting
Max.
possible
spacers
Factory
setting
Max.
possible
spacers
Factory
setting
Max.
possible
spacers
Factory
setting
Max.
possible
spacers
Factory
setting
Max.
possible
spacers
160mm 3 6
150mm 3636
140mm 3636
130mm 3636
120mm 3 6 2 4
100mm 242525
80mm 2525
60mm 2 5 4 4
50mm 4 4
40mm 4 4
Note:
Don't exceed the Maximum Volume spacers number because this can damage your fork.
15
COIL SPRING PRELOAD
The fork can be adjusted to the rider's weight and preferred
riding style via the spring preload. It is not the coil spring
hardness that is set, but the spring preload. This reduces the
“SAG” of the fork when the rider sits down. A medium
hardness spring is used as standard setting. Turn the preload
adjust knob clockwise to increase the spring preload and turn
it counter-clockwise to reduce it. Two additional spring
hardnesses are available for SR SUNTOUR suspension forks -
softer and harder than the standard coil spring.
MAINTENANCE OF THE FORK
As long as moving parts are exposed to moisture and contamination, the performance of your
suspension system might be reduced after several rides. In order to maintain high performance,
safety and a long life of your suspension system, periodic maintenance is required.
ØA suspension system which has not been serviced in accordance with the maintenance
instructions will not be covered under warranty.
ØNever use a pressure washer or any water under pressure to clean your suspension fork as
water may enter the fork at the dust seal level. Never use aggressive cleaners. We
recommend clear water and a damp cloth to wipe down your fork.
ØYour suspension fork should be serviced more frequently as indicated below if you ride in
extreme weather (winter time, or in wet/muddy conditions) and rough terrain conditions.
ØIf you believe that your suspension system performance has changed or handles differently,
immediately contact your local dealer to inspect your fork.
ØAfter every ride: Clean the fork stanchion tubes and dust seals and maintain with an oily
cloth. Check stanchion tubes for dents, scratches or other discoloration or leaking oil.
ØEvery 50 hours: Maintenance 1 (at dealer)
ØEvery 100 hours or once a year: Maintenance 2 (at dealer, ideally before winter time in
order to protect all parts from the effects of weather by proper greasing)
MAINTENANCE 1:
Check fork function / check torques of mountings screws and nuts on bottom of lowers
(suggested tightening torque: bolt: 10Nm, nut: 8Nm) / check for scratches, dents, cracks,
discoloration, signs of wear and signs of minor corrosion (maintain with oily cloth), or oil leaks.
MAINTENANCE 2:
Maintenance 1 + disassembly / cleaning the entire fork inside and out / cleaning and lubricating
dust seals and slider sleeves / checking torques / adjusting to the riders liking.
Before disassembly, check the slider sleeve play of the fork. To do so, apply the front wheel
brake and gently push the bicycle back and forth at the handlebar stem shaft. Replace the slider
sleeves if the play is excessive (more than 1 mm at the fork brace).
16
INTENDED USE
Suggested bike type
Pedal assist E-
bike (EU
S.pedelec
or
US-Class 3)
Pedal assist E-
bike (EU
pedelec or US-
Class 1 & 2)
Pedal assist E-
bike (EU
pedelec or US-
Class 1 & 2)
Cross bike
Trekking bike
City bike
Downhill bike
Enduro bike
All moutain
bike
Cross country
racing bike
Cross country
bike
Warning Warning Warning Warning Warning Warning Warning Warning Warning Warning Warning
USE ONLY FOR
USE ONLY FOR
USE ONLY FOR
USE ONLY FOR
USE ONLY FOR
USE ONLY FOR
USE ONLY FOR
USE ONLY FOR
USE ONLY FOR
USE ONLY FOR
USE ONLY FOR
Pedal assist
bikes EU speed
pedelec or US-
Class 3 for on-
road use
Pedal assist
bikes EU
pedelec or US-
Class 1 & 2 for
on
-road use
Pedal assist
bikes EU
pedelec or US-
Class 1 & 2 for
off-road use
Paved road or
casual off
-
road use
Paved road or
casual off
-
road use
Paved road
use
Downhill
Cross country,
Trail and
Enduro use
Cross country,
Trail and All
moutain use
Cross country
racing and
cross country
use
Cross country
use
DO NOT USE
FOR
DO NOT USE
FOR
DO NOT USE
FOR
DO NOT USE
FOR
DO NOT USE
FOR
DO NOT USE
FOR
DO NOT USE
FOR
DO NOT USE
FOR
DO NOT USE
FOR
DO NOT USE
FOR
Downhill,
Enduro
, All
mountain, XC
racing, XC
Downhill,
Enduro
Downhill
Downhill, Enduro, All mountain, XC racing,
XC
Downhill
Downhill
Downhill,
Enduro, All
mountain
Downhill,
Enduro
, All
mountain, XC
racing
MOBIE35 BOOST
O O O
MOBIE34
O O
MOBIE45
O O
MOBIE25
O O O
MOBIE
-A32 O O O
MOBIE34 CGO
BOOST 20"
O O O
MOBIE
-A32 CGO
20"
O
XCR32
-ATB O O O
XCM32
-ATB O O O
GVX32
O O O
NRX32
O O O
NRX30
O O O
NCX32
O O O
NCX
O O O
NVX30
O O O
NEX
-E25 O O O
CR85
-E25 O O
TR
-HSi O O
NX1
O O O
NEX
O O
M3010 700C/26"
O O
M3010 24"/20"
O
CR8
O
RUX38 BOOST
O
DUROLUX38 BOOST
O O
DUROLUX36 BOOST
O O
AURON35 BOOST
O O
AION35 EVO BOOST
O O
ZERON35 BOOST
O O
AXON34 werx
BOOST
O
AXON34 elite
BOOST
O O
AXON32
werx O
AXON34 BOOST
O O O
AXON32 BOOST
O
AXON32
O
EPIXON
O
RAIDON34 BOOST
O O O
RAIDON32 BOOST
O
RAIDON32
O
XCR34 BOOST
O O O O
XCR32 BOOST
O
XCR32
O
XCR24"
O
X1
O
XCM34 BOOST
O O O O
XCM32 BOOST
O
XCM32
O
XCM
O O
XCM 24" BOOST
O
XCM
-JR. 20" O
XCT30
O
XCT 24” plus
O
XCT28 L24"
O
XCT 20” plus
O
XCT L20"
O
XCT 24"/20"
O
XCE28
O
17
NOTE
18
NOTE
19
NOTE
CUSTOMER SUPPORT OFFICES
WEB LINKS
For further information please visit www.srsuntour-cycling.com. There you will also find:
uService request: http://www.srsuntour-cycling.com/service/service-request
uTech videos: http://www.srsuntour-cycling.com/service/tech-videos
uDownload area: http://www.srsuntour-cycling.com/service/download-area
uOwners manuals: http://www.srsuntour-cycling.com/ja/service/download-area/consumer-
downloads/bike/owners-manuals/general-fork-manual/
uFork glossary: http://www.srsuntour-cycling.com/service/fork-glossary
uWarranty: http://www.srsuntour-cycling.com/service/warranty
Copyright © 2021 SR SUNTOUR Inc. All rights reserved.
ASIA, OCEANIA
SR SUNTOUR INC.
#7 Hsing Yeh Road
Fu Hsing Industrial Zone
Chang Hua, Taiwan, R.O.C.
Tel: +886-(0)4-769-5115
service@srsuntour.com.tw
SR SUNTOUR INTERNATIONAL CO., LTD.
No. 1500 Honghu Road, Penglang
Kunshan, Development Zone
Jiang Su Province, China ZIP 215333
Tel: +86-512-5517-1127
sr-service@srsuntour.com.cn
SRS INTERNATIONAL TRADING LTD.
Room 501, 5th floor, Building No. 2
Jiaxing Industrial Zone, Shubei Road
Gongming Town, Guangming District
Shenzhen City, China 518106
Tel: +86-755-271-084 83
service@srsuntour.com.cn
SR SUNTOUR JAPAN
NR Bldg. 4F, 3-13-13 Kuramae
Taito-ku, Tokyo, 111-0051
Tel: +81-3-5829-9211
EUROPE
SR SUNTOUR EUROPE GmbH
Riedstrasse 31
83627 Warngau, Germany
Tel: +49-(0)802-150-793-0
service@srsuntour-cycling.com
SR SUNTOUR Düsseldorf GmbH
Fichtenstrasse 115,
40233 Düsseldorf Germany
Tel: +49-(0)211-5426-8950
service@srsuntour-cycling.com
SAV SR SUNTOUR FRANCE
604 voie Galilee
73800 Sainte Helene du Lac, France
Tel: +33-(0)981-241650
sav@srsuntour-cycling.com
USA
SR SUNTOUR North America Inc.
7509 S. 5th Street Suite 124
Ridgefield, Washington 98642
Tel: +1-360-737-6450
Sales: ssna@srsuntourna.com
Service, warranty: service@srsuntourna.com
SR SUNTOUR Madison
910 Watson Avenue
Madison, Washington 53713 USA
Tel: +1-608-229-6610
service@usulcorp.com
KAE261
20

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