USER MANUAL
Contents
1. 01234546 S H 0 H buahahaha GRADIENTS U S A SRAM CORPORATION Duke USER MANUAL ENGLISH Congratulations You have the best in suspension components on your bicycle This manual contains important information about the safe operation and maintenance of your fork To ensure that your RockShox fork performs properly we recommend that you have your fork installed by a qualified bicycle mechanic We also urge you to follow our recommendations to help make your riding experience more enjoyable and trouble free Steerer Tube Gabelschaftrohr Potencia tubo de direcci n Tube pivot Cannotto di sterzo della forcella AFTUvY FAT Stuurbuis Tubo de direc o Crown Gabelkopf Corona TCEte Testa 97907 Kroon Coroa Rebound Adjuster Einstellung f r Zugstufe Ajustador externo de rebote Bouton de r glage du rebond Regolazione del ritorno UND E ENS Afstelling terugvering Regulador de recupera o U Turn Travel Adjust U Turn Einsteller fr Federweg Ajuste del recorrido con giro completo Bouton de rZglage du d battement U Turn Regolazione del precarico U Tum US 7 RINA Instelling bewegingsruimte U Turn Regula o de curso U Turn Upper Tube Oberes Rohr Tubo superior Tube sup rieur Stelo TIN FAT Bovenbuis Tubo superior Brake Post Montagesockel fr Bremse Pasador de freno Tige de frein Supporto freno TUE RAL Remhouder Espig o de trav o NoTE YOUR FORK S APPEARANCE MAY VARY FRO2. titanium magnesium or steel Brake pads e Chains e Sprockets e Cassettes Shifter and brake cables inner and outer Handlebar grips e Shifter grips e Jockey wheels e Disc brake rotors e Tools This warranty shall not cover damages caused by the use of parts of different manufacturers This warranty shall not cover damages caused by the use of parts that are not compatible suitable and or authorised by SRAM for use with SRAM components SRAM CORPORATION APRIL 2004 13
3. 309201 000 Rev B SRAM CORPORATION Duke USER MANUAL ENGLISH SRAM CORPORATION WARRANTY Extent of Limited Warranty SRAM warrants its products to be free from defects in materials or workmanship for a period of two years after original purchase This warranty only applies to the original owner and is not transferable Claims under this warranty must be made through the retailer where the bicycle or the SRAM component was purchased Original proof of purchase is required Local law This warranty statement gives the customer specific legal rights The customer may also have other rights which vary from state to state USA from province to province Canada and from country to country elsewhere in the world To the extent that this warranty statement is inconsistent with the local law this warranty shall be deemed modified to be consistent with such law under such local law certain disclaimers and limitations of this warranty statement may apply to the customer For example some states in the United States of America as well as some governments outside of the United States including provinces in Canada may a Preclude the disclaimers and limitations of this warranty statement from limiting the statutory rights of the consumer e g United Kingdom b Otherwise restrict the ability of a manufacturer to enforce such disclaimers or limitations Limitations of Liability To the extent allowed by local law except for the obligat
4. or any other mounts or cable stops Do not use a front brake cable leverage device mounted to the brace Forks designed for use with disc style brakes follow the brake manufacturers installation instruction for proper installation and mounting of the brake caliper 7 Observe all owner s manual instructions for care and service of this product ROCKSHOX FORKS ARE DESIGNED FOR COMPETITIVE OFF ROAD RIDING AND DO NOT COME WITH THE PROPER REFLECTORS FOR ON ROAD USE YOUR DEALER SHOULD INSTALL PROPER REFLECTORS TO MEET THE CONSUMER PRODUCT SAFETY COMMISSION S CPSC REQUIREMENTS FOR BICYCLE STANDARDS IF THE FORK IS GOING TO BE USED ON PUBLIC ROADS AT ANY TIME 4 954 309201 000 Rev B SRAM CORPORATION Duke USER MANUAL ENGLISH FORK INSTALLATION It is extremely important that your RockShox fork is installed correctly by a qualified bicycle mechanic Improperly installed forks are extremely dangerous and can result in severe and or fatal injuries 1 Remove the existing fork from the bicycle and the crown race from the fork Measure the length of the fork steerer tube against the length of the RockShox steerer tube The RockShox steerer tube may need cutting to the proper length Make sure there is sufficient length to clamp the stem refer to the stem manufacturet s instructions DO NOT ADD THREADS TO ROCKSHOX THREADLESS STEERERS THE STEERER TUBE CROWN ASSEMBLY IS A ONE TIME PRESS FIT REPLACEMENT OF THE ASSEMBLY MUST BE DONE TO CHANGE
5. END OF THE REBOUND ADJUSTER INTO THE FLOODGATE Don T FORGET TO RE INSTALL THE ADJUSTER AFTER USE 8 954 309201 000 Rev B SRAM CORPORATION Duke USER MANUAL ENGLISH Floodgate Adjustment Lock blowoff force when the fork is in Lock mode Force High Medium Low L Floodgate Setting 7 Maximum Minimum Floodgate in full Floodgate turning Floodgate in full clockwise position counterclockwise counterclockwise position High input force Medium input force Low input force needed to overcome needed to overcome needed to overcome the Lock the Lock the Lock External Floodgate Internal Floodgate Fig 3 COMPRESSION ADJUSTMENT Fic 4 Some fork models also feature adjustable compression damping Increased compression decreases fork movement in the Open position Compression adjustment can be used to help combat brake dive and squatting under hard cornering For crown activated forks compression damping increases to Lock as the crown mounted actuator rotates 90 degrees clockwise Position the actuator anywhere within the range from Open to Lock to suit the desired level of compression damping Forks equipped with the PopLoc Adjust provide compression damping adjustment for the Open position Turning the blue adjuster on the PopLoc adjust clockwise increases compression damping for the Open position The PopLoc lever features gradients to help illustrate the curre
6. M THE ILLUSTRATIONS PHOTOS IN THIS MANUAL FOR THE LATEST INFORMATION ABOUT YOUR FORK VISIT OUR WEBSITE AT WWW ROCKSHOX COM SRAM CORPORATION APRIL 2004 ENGLISH SRAM CORPORATION DUKE USER MANUAL The fork on your bicycle is designed for use by a single rider on mountain trails and similar off road conditions Before riding the bicycle be sure the brakes are properly installed and adjusted Use your brakes carefully and learn your brakes characteristics by practicing your braking technique in non emergency circumstances Hard braking or improper use of the front brake can cause you to fall If the brakes are out of adjustment improperly installed or are not used properly the rider could suffer serious and or fatal injuries Your fork may fail in certain circumstances including but not limited to any condition that causes a loss of oil collision or other activity bending or breaking the fork s components or parts and extended periods of non use Fork failure may not be visible Do not ride the bicycle if you notice bent or broken fork parts loss of oil sounds of excessive topping out or other indications of a possible fork failure such as loss of shock absorbing properties Instead take your bike to a qualified dealer for inspection and repair In the event of a fork failure damage to the bicycle or personal injury may result Always use genuine RockShox parts Use of aftermarket replacement parts voids the warranty and could caus
7. O THE OPEN POSITION Floodgate settings should be used to adjust suspension compliance to medium sized bumps and resistance to rider induced suspension movement referred to as bob in the Lock mode When properly tuned the Motion Control System will resist bob but provide controlled suspension action in rough or aggressive terrain Under Lock heavier riders may find better performance with maximum Floodgate settings while lighter riders may find minimum Floodgate settings work best Experiment with higher or lower Floodgate settings while on the trail to optimize your fork for your riding style and performance preferences Use the charts below to establish an initial Floodgate setting All settings from Maximum Floodgate or full clockwise EXTERNAL FLOODGATE RACE MoDEL Rider weight lb kg Full Turns Counterclockwise lt 120 lt 54 kg 4 5 120 150 54 68 kg 3 4 150 180 68 82 kg 223 180 210 82 95 kg 12 210 lt 95 kg lt 0 1 INTERNAL FLOODGATE SL MoDEL Rider weight lb kg Full Turns Counterclockwise lt 120 54 kg 2 0 120 150 54 68 kg 1 5 2 0 150 180 68 82 kg 1 0 1 5 180 210 82 95 kg 0 5 1 0 210 lt 95kg lt 0 0 0 5 TIP THE REBOUND ADJUSTER ON THE BOTTOM RIGHT FORK LEG CAN BE USED TO ADJUST INTERNAL FLOODGATE MODELS GENTLY PULL DOWNWARD ON THE REBOUND ADJUSTER FOR REMOVAL REMOVE THE GOLD GATE DUST CAP AND INSERT THE 2 5MM HEX
8. THE LENGTH DIAMETER OR HEADSET TYPE THREADED OR THREADLESS DO NOT REMOVE OR REPLACE THE STEERER TUBE THIS COULD RESULT IN THE LOSS OF CONTROL OF THE BICYCLE WITH POSSIBLE SERIOUS AND OR FATAL INJURIES 2 Install the headset crown race 29 9mm for 1 1 8 steerers firmly against the top of the fork crown Install the fork assembly on the bike Adjust the headset until you feel no play or drag 3 Install the brakes according to the manufacturer s instructions and adjust brake pads properly Use the fork only with disc style brakes mounted through the provided mounting holes Do not use any cantilever brake other than those intended by the brake manufacturer to work with a hangerless brace 4 Forks designed for standard quick releases adjust the front wheel quick release to clear the dropout s counter bore The quick release nut must be tightened after the wheel is properly seated into the dropout s counter bore Make sure four or more threads are engaged in the quick release nut when it is closed Orient the quick release lever in front of and parallel to the lower tube in the locked position Forks designed for a thru axle not available for all forks follow the installation instructions that follow for the Maxle Quick Release system 5 Keep in mind tire clearance as you choose tires Maximum size is 2 4 wide or 696 mm diameter installed Be sure to check this diameter whenever you change tires To do this remove ai
9. cement springs Note WHEN DECREASING TRAVEL SEE U TURN TRAVEL ADJUST YOU INCREASE THE SPRING RATE SRAM CORPORATION APRIL 2004 11 ENGLISH SRAM CORPORATION DUKE USER MANUAL MAINTENANCE To maintain the high performance safety and long life of your fork periodic maintenance is required If you ride in extreme conditions maintenance should be performed more frequently WE RECOMMEND THIS SERVICE BE PERFORMED BY A QUALIFIED BICYCLE MECHANIC TO OBTAIN SERVICE INFORMATION OR INSTRUCTIONS VISIT OUR WEBSITE AT WWW ROCKSHOX COM OR CONTACT YOUR LOCAL ROCKSHOX DEALER OR DISTRIBUTOR Torque Tightening Values Top Caps 65 in lb Brake Posts 80 in Ib Shaft Bolts 60 in Ib U Turn Knob Screw 12 in Ib PopLoc Remote handlbar clamp bolt 20 in Ib PopLoc Remote cable fixing bolt 8 in Ib SERVICE INTERVALS Duke XC Duke SL Duke Race lean dirt and debris from upper tubes nspect upper tubes for scratches Lubricate dust seals tubes Check top caps brake posts and shaft bolts for proper torque heck air pressure Remove lowers clean inspect nd change oil bath iLin Motion Control System lubricate Air U Turn Dual ist assembly ubricate coil spring or coil U Turn spring assembly Clean and lubricate PopLoc cable and housing Notes E Every ride Numeric values represent hours of riding time Increase service intervals based on rider weight aggressive riding style conditions inclement weather and racing 12 954
10. e structural failure to the shock Structural failure could result in loss of control of the bicycle with possible serious and or fatal injuries Use extreme caution not to tilt the bicycle to either side when mounting the bicycle to a carrier by the fork drop outs front wheel removed The fork legs may suffer structural damage if the bicycle is tilted while the drop outs are in the carrier Make sure the fork is securely fastened down with a quick release Make sure the rear wheel is fastened down when using ANY bike carrier that secures the fork s drop outs Not securing the rear can allow the bike s mass to side load the drop outs causing them to break or crack If the bicycle tilts or falls out of its carrier do not ride the bicycle until the fork is properly examined for possible damage Return the fork to your dealer for inspection or call RockShox if there is any question of possible damage See the International Distributor List A fork leg or drop out failure could result in loss of control of the bicycle with possible serious and or fatal injuries Forks designed for use with v style brakes only mount cantilever type brakes to the existing brake posts Forks with hangerless style braces are only designed for V style or hydraulic cantilever brakes Do not use any cantilever brake other than those intended by the brake manufacturer to work with a hangerless brace Do not route the front brake cable and or cable housing through the stem
11. en level maximum fork movement Fork movement Crown mounted adjuster Motion Control Lock Compression at Lock level minimum fork movement Fork movement Crown mounted adjuster SRAM CORPORATION APRIL 2004 ENGLISH SRAM CORPORATION Duke USER MANUAL ROSS 0000023 o o PopLoc Remote NT a A PopLoc Remote PopLoc Adjust Remote ENGLISH SRAM CORPORATION DUKE USER MANUAL FLOODGATE ADJUSTMENT Fic 3 All forks with Motion Control Damping allow for fine tuning of the Lock setting The rider can choose the point at which the Lock setting can blow off and become active to force inputs such as bumps or rocks This adjustment is made using the Floodgate Depending upon fork model the Floodgate is adjusted either internally requires a 2 5mm hex wrench or externally with the gold Gate adjuster For crown mounted adjusters hold the adjuster in the Lock position while adjusting the internal Floodgate NoTE THE FLOODGATE IS INTENDED TO ADJUST THRESHOLD OF LOCK BLOW OFF IN THE LOCK MODE ONLY WHEN PERFORMING FLOODGATE ADJUSTMENTS ENSURE THAT THE MOTION CONTROL SYSTEM IS ADJUSTED TO Lock Under Lock the maximum Floodgate setting results in a fork with minimal movement while the minimum Floodgate setting results in increased fork movement NoTE FOR MAXIMUM FORK SENSITIVITY AND MOVEMENT RETURN THE FORK T
12. ions specifically set forth in this warranty statement In no event Shall SRAM or its third party supplies be liable for direct indirect special incidental or consequential damages Limitations of Warranty This warranty does not apply to products that have not been incorrectly installed and or adjusted according to the respective SRAM technical installation manual The SRAM installation manuals can be found online at www sram com or www tockshox com This warranty does not apply to damage to the product caused by a crash impact abuse of the product non compliance with manufacturers specifications of usage or any other circumstances in which the product has been subjected to forces or loads beyond its design This warranty does not apply when the product has been modified This warranty does not apply when the serial number or production code has been deliberately altered defaced or removed This warranty does not apply to normal wear and tear Wear and tear parts are subject to damage as a result of normal use failure to service according to SRAM recommendations and or riding or installation in conditions or applications other than recommended WEAR AND TEAR PARTS ARE IDENTIFIED AS e Dust seals e Bushings e Air sealing o rings e Glide rings e Rubber moving parts e Foam rings e Rear shock mounting hardware e Upper tubes stanchions and main seals Stripped threads bolts aluminium e Brake sleeves
13. k to bottom out Set your fork to rebound as fast as possible without topping out or kicking back This allows your fork to follow the contours of the trail maximizing stability traction and control U TURN TRAVEL ADJusT XC U TURN MODELS Duke U turn forks can be adjusted from 63 to 108 mm of travel To determine the travel on your fork use the travel gradients on the upper tube Changing Travel Turning the U turn adjuster knob counterclockwise increases travel From minimum travel there are approximately six turns to achieve maximum travel 108 mm Each turn increases or decreases the travel by 7 5 mm fig 5 IMPORTANT STOP TURNING THE U TURN ADJUSTER KNOB AFTER YOU HAVE REACHED 108 MM OF TRAVEL MAXIMUM TRAVEL TURNING THE KNOB PAST THIS POINT MAY CAUSE DAMAGE TO THE U TURN FEATURE 10 954 309201 000 Rev B SRAM CORPORATION Duke USER MANUAL ENGLISH Spring Rate Increase 30 0 25 0 20 0 15 0 10 0 5 0 0 0 Increase of Spring Rate 108 100 5 93 85 5 78 70 5 63 U Turn Travel Adjustment mm Fig 5 FINE TUNING Checking Sag Sag is adjusted by increasing or decreasing the positive air pressure of your fork less air equals more sag Setting Sag Duke forks are designed to sag when you are sitting on your bike Sag is the compression of the fork caused by the rider s weight Proper sag allows the front wheel to follow the contour of
14. ns without requiring pumps or tools This system provides for wide ranging control of compression and rebound damping as well as Lock threshold sensitivity Proper setup of the Motion Control Damping system provides a range of options for efficient yet comfortable performance The instructions below describe setup and operation for both crown and remote activated forks OPEN COMPRESSION Fic 1 In the Open position the Motion Control Damping system allows for maximum compliance and fork movement The Open position provides ultimate control and comfort on even the roughest terrain To return your fork to the Open position e For forks with the crown mounted blue compression adjuster rotate the adjuster fully counterclockwise For PopLoc equipped forks press the unlock release button on the remote as indicated by the open padlock icon on the button Lock COMPRESSION Fic 2 In the Lock position the Motion Control system allows for a small amount of controlled fork movement This movement enables the front tire to track the terrain without deflecting off obstacles allowing for better traction and steering control when compared to a complete lockout system To activate the Lock turn the crown mounted blue compression adjuster full clockwise or press forward on the PopLoc Remote lever located on the handlebar 6 954 309201 000 Rev B Motion Control Open Compression at Op
15. nt level of compression Eight complete turns of adjustment are provided TIP ADJUSTING COMPRESSION ON FORKS EQUIPPED WITH PopLoc ADJUST IS BEST DONE WITH THE FORK IN Lock POSITION NoTE THE COMPRESSION SETTING DOES NOT ADVERSELY EFFECT YOUR FORK S PERFORMANCE OVER HIGH SPEED IMPACTS SRAM CORPORATION APRIL 2004 9 ENGLISH SRAM CORPORATION DUKE USER MANUAL Compression Range Turning the compression adjuster on the PopLoc Adjust sets how far the lever returns from Lock toward the Open Select compression damping position This adjustment changes the amount of between Open and Lock compression damping found in the Open position Remote Compression Adjuster ys c E gt fe E x O LL Crown mounted adjuster PopLoc Adjust Remote Fig 4 External Rebound Adjustment Race SL and XC models Rebound damping controls the speed at which a fork returns to its full extension following compression Located at the bottom of the right fork leg is the rebound adjuster knob Turning the adjuster in the direction indicated by the rabbit on the rebound speed decal decreases rebound damping causing the fork to return to full extension faster Turning the adjuster in the direction indicated by the turtle increases rebound damping slowing the return of the fork to full extension Excessive rebound damping will cause the fork to pack up over successive bumps reducing travel and causing the for
16. r pressure and compress the fork completely to make sure at least 5 mm of clearance exists between the top of the tite and the bottom of the crown Exceeding maximum tite size will cause the tire to jam against the crown when the fork is fully compressed PopLoc REMOTE INSTALLATION The PopLoc Remote Lockout lever allows the rider to control the movement of their suspension fork without removing their hands from the handlebars If needed remove the grip brake lever and shifter from the left side rider s perspective of the handlebar If you are unfamiliar with the removal of these items please consult the manufacturer s instructions 1 Slide the PopLoc onto the handlebar 2 Re install the shifter brake lever and grip on the handlebars If you are unfamiliar with the installation of these items please consult the manufacturer s instructions Always adhere to the recommended torque specifications for these items 3 Position the PopLoc as desired on the handlebar and tighten the clamp bolt to 20 in Ib 2 25 Nm 4 Forks with PopLoc Adjust Turn the blue compression adjustment dial counterclockwise until it stops 5 Press the release button on the PopLoc 6 Install the cable in the PopLoc 7 Install the cable into the housing 8 Feed the cable and housing into the cable stop on the fork crown SRAM CORPORATION APRIL 2004 5 ENGLISH SRAM CORPORATION DUKE USER MANUAL 9 Gently pull on the cable and align it with the g
17. roove in the rotating cam of the Motion Control damper 10 Tighten the cable fixing bolt on the rotating cam to 8 in Ib I Nm PERFORMANCE TUNING RockShox forks can be tuned for your particular weight riding style and terrain Air Spring Tuning The air spring system of your Duke fork can be easily tuned for your weight and riding style Use the following instructions as a starting point If further fine tuning is desired follow the hints at the end of this section Using the chart below as a guideline inflate the positive air chamber to the desired pressure Rider Weight HydraAir Pressure lt 140 63kg 80 115 psi 140 160 63 72 kg 115 130 psi 160 180 72 81 kg 130 145 psi 180 200 81 90 kg 145 160 psi gt 220 99 kg 160 180 psi Motion Control Damping System SL and Race Models IMPORTANT NOTE WHEN STORING A BICYCLE OR FORK UPSIDE DOWN OR ON ITS SIDE OIL SEALED IN THE UPPER TUBE CAN COLLECT ABOVE THE MOTION CONTROL DAMPER ASSEMBLY UPON RETURNING THE BICYCLE FORK TO A NORMAL RIDING POSITION INITIAL PERFORMANCE OF THE MOTION CONTROL SYSTEM MAY BE LESS THAN OPTIMAL TO QUICKLY RETURN THE FORK TO PROPER PERFORMANCE RETURN THE FORK TO OPEN POSITION AND CYCLE THE FORK THROUGH ITS TRAVEL 10 20 TIMES FOR INFORMATION ON RETURNING YOUR FORK TO OPEN POSITION KEEP READING The Motion Control Damping system allows riders to quickly adjust the feel and performance of their suspension to match riding conditio
18. the terrain as you ride To measure sag use the travel indicator included with your fork or install a zip tie on the upper tube of the fork flush against the wiper seal Sit on the bike with normal riding apparel Step off the bike and measure the distance between the wiper seal and the travel indicator or zip tie This is your sag The sag should be approximately 20 percent of the maximum travel ADDING Positive AIR PRESSURE Remove the air cap to expose the air valve Using a RockShox Air Pump with schrader valve add the recommended air pressure see Air Pressure Guidelines Note MAXIMUM RECOMMENDED AIR PRESSURE IS 180 PSI Checking Sag for Duke XC U Turn To measure sag set the fork to maximum travel 108 mm Install a zip tie on the upper tube of the fork flush against the wiper seal Sit on the bike with normal riding apparel Step off the bike and measure the distance between the wiper seal and the zip tie This is your sag The sag should be approximately 20 percent of maximum travel If you re unable to achieve optimum sag you may need to change the fork s spring CHANGING THE SPRING RATE Spring rate is the amount of force needed to compress a spring one inch Changing your fork s coil spring for a spring of a higher or lower rate will alter the overall feel of your fork Higher spring rates make the fork feel more stiff while lower spring rates make the fork more supple Contact your local RockShox dealer to order repla
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