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SRAM CORPORATION • BOXXER USER MANUAL
SRAM CORPORATION • BOXXER USER MANUAL
ENGLISH
To change the preload:
U - t u r n Tra ve l A d j u st ( R i d e O n ly )
1.
2.
3.
4.
5.
Boxxer Ride forks can be adjusted from 133 to 178 mm of travel. To determine the travel
on your fork, use the travel gradients on the upper tube.
E x t e r n a l R e b o u n d A d j u st m e n t
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. Using the 2.5mm hex key that came with your fork, turn the adjuster in the
direction indicated by the rebound speed decal. The adjuster has a 90-degree range of
adjustment. Turning the adjuster toward the "rabbit" 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.
C h a n g i n g Tra ve l ( R i d e O n ly )
Turning the U-turn adjuster knob counterclockwise increases travel. From minimum
travel, there are approximately six turns to achieve maximum travel (178 mm). Each
turn increases or decreases the travel by 7.5 mm (fig. 2).
IMPORTANT: STOP TURNING THE U-TURN ADJUSTER KNOB AFTER YOU’VE REACH 178 MM OF TRAVEL
(MAXIMUM TRAVEL). TURNING THE KNOB PAST THIS POINT MAY CAUSE DAMAGE TO THE U-TURN FEATURE.
Spring Rate Increase
% Increase of Spring Rate
Remove the top caps with a 24mm six-point socket wrench.
Inspect the O-rings for damage and replace if necessary.
Slightly compress the fork to get access to the preload spacers, which sit on top of the spring stacks.
Add or remove preload spacers and/or springs as necessary.
Re-install top caps and torque to 55 to 75 in-lb.
NOTE: THIS ADJUSTER IS NOT INDEXED.
Excessive rebound damping will cause the fork to "pack up" over successive bumps,
reducing travel and causing the fork 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.
NOTE: THE HEX KEY MAY BE USED ON BOTH REBOUND AND COMPRESSION DAMPING ADJUSTMENTS. FOR ONTHE-TRAIL-USE, THE HEX KEY MAY BE STORED BY CAREFULLY SLIDING IT IN BETWEEN THE UPPER TUBE AND
RUBBER FORK STOP.
External Low Speed Compression Adjustment (World Cup and Team)
Low speed compression damping controls pedal bob, brake dive and fork sensitivity.
The adjuster is located in the lower left leg and is accessible with a 2.5mm hex key
inserted through the hollow shaft bolt. The adjuster has eight full turns of adjustment.
Clockwise rotation of the adjuster results in more low speed compression damping.
Compression damping should be adjusted any time the springs or preload have been
changed. Proper compression damping depends on rider style, weight, preference and
fork setup.
NOTE: THIS ADJUSTER IS NOT INDEXED.
Internal High Speed Compression Adjustment (World Cup
and Team)
High Speed
Compression
Adjuster Nut
This adjuster controls high speed compression blow-off while leaving your
low speed compression adjustment virtually unchanged. The high speed
compression adjuster is located inside the left leg. To adjust the high speed
compression you must follow instructions available in the Boxxer Service
Guide available on our website at www.rockshox.com. With the assembly
removed, use a 5mm wrench, turn the compression nut clockwise to
increase high speed compression damping and counterclockwise to decrease
high speed compression damping (Fig. 1). Note the location of the low speed
adjuster prior to making the high speed adjustment.
CAUTION: ENSURE
THE
20.0%
15.0%
10.0%
5.0%
0.0%
140.5
148
155.5
163
170.5
178
U-Turn Travel Adjustment (mm)
Fig. 2
B ox xe r R i d e : C h a n g i n g t h e S p r i n g R a t e
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
replacement springs.
NOTE: WHEN DECREASING TRAVEL (SEE “U-TURN TRAVEL ADJUST”), YOU INCREASE THE SPRING RATE.
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.
*
NUT MAY BECOME DISENGAGED DURING OPERATION IF THE
ADJUSTER IS NOT FULLY THREADED INTO THE NUT.
C h a n g i n g Tra ve l ( R a ce O n ly )
25.0%
133
THE END OF THE COMPRESSION ADJUSTER ROD DOES NOT BECOME
RECESSED INTO THE NUT.
30.0%
TO
Fig. 1
WE RECOMMEND THIS SERVICE BE PERFORMED BY A QUALIFIED BICYCLE MECHANIC.
OBTAIN SERVICE INFORMATION OR INSTRUCTIONS, VISIT OUR WEBSITE AT WWW.ROCKSHOX.COM OR
CONTACT YOUR LOCAL
ROCKSHOX DEALER OR DISTRIBUTOR.
To change the travel of your fork you must perform a full service on your fork. To
obtain service information or instructions, visit our website at www.rockshox.com or
contact your local RockShox dealer or distributor.
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95.4309.223.000, REV. D
SRAM CORPORATION. • DECEMBER 2004
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