SAFETY WARNINGS
EXPLODED VIEW OF BRAKE ASSEMBLY
TRP BRAKES
688 W. Amidan Dr. 4X-1
Ogden, UT 84404
Toll Free: 1-877-807-4162
Direct: 1-650-965-4442
Email: info@trpbrakes.com
Web: www.trpbrakes.com
T850 / T851
IN S TA LLATI O N I N STR U CTI O NS
Brake Pad Mounting
Bolt & Washer
Pad Holder
Brake Pad
Conical Washer
Pad Retaining Screw
Brake, Adjusting Arm
Spring Carrier
Rim Width Adjuster
Screw, 2mm
Spring Adjuster, 2mm
Brake, Upper Arm
Brake Cable Noodle
Pivot Bolt
Cable fixing Bolt
Straddle
T15 Cable Screw
• Improper use of your bicycle’s brake system may result in loss of control or an accident which could lead to severe injury. Because each bicycle
may handle differently, be sure to learn the proper braking technique (including brake lever force and bicycle control characteristics) for your
bicycle. Consult your bicycle dealer and/or the bicycle owner’s manual and practice your riding and braking technique.
• Securely tighten the caliper brake mounting hardware to the specified torque.
When re-installing, apply blue thread retaining compound to the brake mounting bolts threads and tighten to specified torque using a calibrated
torque wrench.
• If the mounting bolt(s) become loose, this could cause the brake to work improperly and cause an accident. This is a particular danger with the
front wheel as the rider may be thrown forward resulting in serious injury.
• Brakes designed for use as rear brakes should not be used as front brakes and vice versa.
• Read the service instructions carefully prior to installing the brakes. Loose, worn or damaged parts may cause serious injury.
• Be careful not to allow any oil or grease to get onto the brake pads. If the pads become contaminated, they should be replaced and the braking
surface of the rims cleaned carefully, otherwise the brakes may not work effectively.
• Always make sure the front and rear brakes are working correctly before you ride the bicycle.
• The required stopping distance will be longer in wet conditions. Tires will also skid more easily, which can result in loss of control. Reduce your
speed by applying the brakes early and gently.
• If using standard Tektro brake pads in combination with ceramic-coated or carbon fiber rims, the pads will wear more quickly than normal. Pads
specifically designed for carbon fiber rim surfaces are available from Tektro/TRP Brakes. Also consult your rim manufacturer for approved pads.
• Pads should be replaced if they have worn to the point that the grooves are no longer visible.
• Parts are not guaranteed against natural wear or deterioration resulting from normal use or crash damage.
• If you are unfamiliar with any element of assembly or maintenance of this brake system, consult a qualified mechanic or contact Tektro / TRP
Brakes Customer Service.
Torque Specifications:
Pivot bolt: 6-7 Nm (53-72 in-lb)
T850 Center PullT851 Side Pull
TRP hydraulic disc brakes are warranted against manufacturing defects in materials and / or workmanship for a period of two ye ars from the date of original retail purchase.
Not covered under this warranty is damage resulting from improper installation, adjustment or maintenance, lack of maintenance, alterations, crashes or use judged by
Tektro to be excessive or abusive. For warranty related questions or more information please contact a TRP Service Center or e-mail at info@trpcycling.com
Cable fixing bolt: 6 Nm (53 in-lb)
Pad fixing bolt: 3-4 Nm (26-35 in-lb)
T15 Cable fixing screw (T850 Center pull): 6 Nm (53in-lb)
For questions about setup, usage or general inquiries, please contact TRP by e-mail at
info@trpbrakes.com or by phone toll free in US, 877-807-4162 or outside US 1-801-648-7079.
INSTALLING AND ADJUSTING BRAKE PADS
INSTALLATION ON FRAME
Changing Brake Pads
Remove the pad retaining screw. Remove the pad by sliding it along the groove of the pad holder.
There are two different types of pads and pad holders to be used in the left and right positions.
(Note the orientation of the pads and holders on the bike if removing to replace the pads.)Slide
the new pad into the grooves of the pad holder making sure of the direction and fixing bolt hole
position relative to the recess in the brake pad.
Fixing bolt
3mm Hex wrench
Torque: 1-1.5 Nm.
TT and Aero road bikes often have cable routing that is more complex than traditional road
bikes. Reduce tight bends and kinks as much as possible to reduce friction for your rear brake.
Compressionless housing should be used to improve a soft or ‘spongy’ feeling brake.
A note about cable routing
The Rim Width Adjuster Screw uses a 2mm hex wrench for adjustment. This feature allows quick
setting of the brake to accommodate changing out wheels with different rim widths. This feature
can also be used for dealing with frame alignment or wheel dish issues. If this feature is used
frequently, you may need to reapply blue thread retainer occasionally to the screw threads.
Rim Width Adjustment
Brake pads will need to be adjusted to fit your particular rim. Including a slight toe-in will reduce
noise or vibration.
Use a 4mm hex wrench to reposition the brake pad holders . Tighten to approve 3 Nm (26 in-lb)
The brake arms can be adjusted to your rim width using the 2mm hex wrench. If this feature is
used frequently, you may need to reapply blue thread retainer occasionally to the screw threads.
Brake Pad Adjustment
BRAKE SET-UP
Cable Installation
Compressionless (linear strand) brake housing, is recommended for T850/T851 Road brakes to
yield the best performance. Sealing systems other than that supplied with your TRP brake are not
recommended as they may create excess friction and affect the brake lever return performance.
Route housing to minimize tight bends and acute angles.
A short length of spiral wound is best for use at the brake lever to accommodate the sharp bend at
the handlebar.
Take particular care when measuring and cutting the brake cable for bottom bracket mounted
rear brakes, such as with the T851. Housing that is too long will push on the brake arm and cause a
soft or squishy feel.
Cable fixing bolt torque for T851: 6 Nm (53 in-lb)
Cable fixing screw torque for T850: 6 Nm (53 in-lb)
Prior to riding, bend the cable after the brake cable fixing bolt so that it does not contact the
crank arm. (B-2)
Tools needed:
4mm hex wrench
Torque wrench
Tools needed:
5mm hex wrench
2mm hex wrench
T15 Torx wrench
1. The T850/851 is designed for Direct Mount specific frames.
2. Install each pivot bolt into its respective hold on the frame or fork. Engage a few threads of
each bolt alternately, instead of threading one bolt all the way in.
3. Tighten the pivot bolts to 6-7 Nm (53-62 in-lbs) torque using a torque wrench.
3. Pull the upper arms together to make sure there is free movement with no friction.
4. If installed on the frame under the bottom bracket, spin the cranks, particularly to check
clearance with crank mounted power meters.
4mm Hex wrench
Torque: 6-7 Nm(53-62 in-lbs)
The length of the brake housing
is critical to good brake feel.
Torque wrench
Cable cutters
Compressionless housing cutters
T851 Side pull
T851 Side pull - Under bottom bracket frame mounting
Cable attachment and bending after the clamp bolt.
Rim width adjustment screw & spring adjust screw
T850 Center pull
Once the pads have been set to your rims, the spring balance can be adjusted with the 2mm
Spring Adjuster Screw . Threading the set-screw in will increase spring tension. Threading out will
reduce spring tension. Balancing the springs should allow pads to contact the rim simultaneously.
Spring Tension Adjustment
Check
Squeeze the brake lever about 10 times to stretch the cable and seat the housing. Check that
the brake is operating correctly and that friction is minimal. Brake pad clearance can be
adjusted using the rim width adjust screws on each brake arm.
000907T850
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