GENERAL SUSPENSION
FORK MANUAL
WARNING !
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.
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 15AH2/12AH2 bolted thru axle assembly…………………………………………………8 20mm bolted thru axle assembly…….…………………………………..……………………9 20mm cross thru axle assembly…………………………………………………………………9 Q-LOC assembly………………….…………………………………………………………………10 Setting SAG…………………………………………………………………………………………….11 Air pressure adjust…….…………………………………………………………………………12 Air volume adjust………….…………………………………………………………………………13 Coil spring preload….…………………..………………………….………………..………….…14 Maintenance of the fork………………..............……………………………………………14 Intended use……..……………….......................………………………………………………15
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www.srsuntour-cycling.com > Service > Download area > Consumer Downloads > Bike > Owners manuals > General Fork Manual
ENGLISH
OVERVIEW
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Disc brake mount |
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brake |
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information check |
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mount |
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page 7 |
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PM 8” |
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IMPORTANT SAFETY INFORMATION
WARNING !
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.
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
BEFORE EVERY RIDE
WARNING !
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.
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
WARNING !
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.).
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
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
WARNING !
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.
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.
4
SUGGESTED TIRE SIZE
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Stanchion |
Suggested tire |
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Max. tire outer diameter |
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Fork model |
Max tire width |
(O.D.) |
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size |
size |
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(* Note below) |
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RUX38 29" BT |
38mm |
29" x 2.8" |
73mm |
770mm |
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RUX38 27.5" BT |
38mm |
27.5" x 2.8" |
73mm |
732mm |
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DUROLUX38 29" BT |
38mm |
29" x 2.6" / |
63mm |
756mm |
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27.5" x 2.8" |
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|
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DUROLUX36 29" BT |
36mm |
29" x 2.6" / |
63mm |
756mm |
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27.5" x 2.8" |
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|
|
|
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DUROLUX36 27.5" BT |
36mm |
27.5" x 2.6" |
63mm |
723mm |
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AURON35 29" BT |
35mm |
29" x 2.4" / |
63mm |
756mm |
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27.5" x 2.8" |
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|
|
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AURON35 27.5" BT |
35mm |
27.5" x 2.8" |
73mm |
737mm |
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AURON34 29" |
34mm |
29" x 2.25" |
58mm |
752mm |
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AURON34 27.5" |
34mm |
27.5" x 2.25" |
58mm |
708mm |
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AION35 29" BT |
35mm |
29" x 2.4" / |
63mm |
756mm |
|
27.5" x 2.8" |
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|
|
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AION35 27.5" BT |
35mm |
27.5" x 2.8" |
73mm |
737mm |
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AION34 29" |
34mm |
29" x 2.25" |
58mm |
752mm |
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AION34 27.5" |
34mm |
27.5" x 2.25" |
58mm |
708mm |
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ZERON35 29" BT |
35mm |
29" x 2.4" / |
63mm |
756mm |
|
27.5" x 2.8" |
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|
|
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ZERON35 27.5" BT |
35mm |
27.5" x 2.8" |
73mm |
737mm |
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AXON34-werx 29" BT |
34mm |
29" x 2.4" |
63mm |
756mm |
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AXON34-elite 29" BT |
34mm |
29" x 2.4" |
63mm |
756mm |
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AXON34 29" BT |
34mm |
29" x 2.4" |
63mm |
760mm |
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AXON34 27.5" BT |
34mm |
27.5" x 2.6" |
67mm |
725mm |
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AXON32 29" BT |
32mm |
29" x 2.4" |
63mm |
756mm |
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AXON32 27.5" BT |
32mm |
27.5" x 2.5" |
66mm |
724mm |
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AXON32 29" |
32mm |
29" x 2.25" |
58mm |
754mm |
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AXON32 27.5" |
32mm |
27.5" x 2.25" |
58mm |
710mm |
|
EPIXON 29" |
32mm |
29" x 2.25" |
58mm |
754mm |
|
EPIXON 27.5" |
32mm |
27.5" x 2.25" |
58mm |
710mm |
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EPIXON 26" |
32mm |
26" x 2.25" |
58mm |
684mm |
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RAIDON34 29" BT |
34mm |
29" x 2.4" |
63mm |
760mm |
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RAIDON34 27.5" BT |
34mm |
27.5" x 2.6" |
67mm |
725mm |
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RAIDON32 29" BT |
32mm |
29" x 2.4" |
63mm |
756mm |
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RAIDON32 27.5" BT |
32mm |
27.5" x 2.5" |
66mm |
724mm |
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RAIDON32 29" |
32mm |
29" x 2.25" |
58mm |
754mm |
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RAIDON32 27.5" |
32mm |
27.5" x 2.25" |
58mm |
710mm |
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RAIDON32 26" |
32mm |
26" x 2.25" |
58mm |
684mm |
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XCR34 29" BT |
34mm |
29" x 2.4" |
63mm |
760mm |
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XCR34 27.5" BT |
34mm |
27.5" x 2.6" |
67mm |
725mm |
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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 |
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XCR 24" |
32mm |
24" x 2.1" |
54mm |
624mm |
5
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