2012
BB7 & BB5
™
™
Mountain and Road
Service Manual
GEN.0000000003513 Rev B
sram LLC 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.
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.
To the extent allowed by local law, except for the obligations specifically set forth in this warranty
statement, in no event shall SRAM or its third-party suppliers be liable for direct, indirect, special,
incidental, or consequential damages.
· This warranty does not apply to products that have 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, www.rockshox.com, www.avidbike.com, www. truvativ.com, or
www.zipp.com.
· 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 damage to the product caused by a crash, impact, abuse of the product,
non-compliance with manufacturer’s 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 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:
Dust seals/Bushings/Air sealing o-rings/Glide rings/Rubber moving parts/Foam rings/Rear shock
mounting hardware and main seals/Stripped threads and bolts (aluminum,titanium, magnesium or steel)/
Upper tubes (stanchions)/Brake sleeves/Brake pads/Chains/Sprockets/Cassettes/Shifter and brake
cables (inner and outer)/Handlebar grips/Shifter grips/Jockey wheels/Disc brake rotors/Wheel braking
surfaces/Bottom out pads/Bearings/Bearing Races/Pawls/Transmission gears/Spokes/Free hubs/
Aero bar pads/Corrosion/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 authorized by SRAM for use with SRAM components.
· This warranty shall not cover damages resulting from commercial (rental) use.
Avid brake service
We recommend that you have your Avid brakes serviced by a qualified bicycle mechanic. Servicing Avid
brakes requires knowledge of brakes components as well as the special tools and fluids used for service.
This publication includes trademarks and registered trademarks of SRAM LLC designated by the symbols ™ and ®, respectively.
Copyright © SRAM LLC 2013
For exploded diagram and part number information, please refer to the Spare Parts Catalog available on our website at www.sram.com.
For order information, please contact your local SRAM distributor or dealer.
Information contained in this publication is subject to change at any time without prior notice. For the latest technical information, please visit our website at www.sram.com.
Your product‘s appearance may differ from the pictures/diagrams contained in this catalog.
Product names used in this document may be trademarks or registered trademarks of others.
2
Table of Contents
BB7 & BB5 Mountain & road disc brake caliper overhaul........................................................................................................................................5
caliper overhaul disassembly service instructions.................................................................................................................................................................... 5
caliper overhaul cleaning & inspection instructions................................................................................................................................................................ 7
caliper overhaul assembly service instructions.......................................................................................................................................................................... 7
bb7 & bb5 mountain & road disc brake pad installation instructions........................................................................................................10
disc brake pad and rotor bed-in procedure.................................................................................................................................................................12
3
SAFETY FIRST!
At SRAM, we care about YOU. Please, always wear your safety
glasses and protective gloves when servicing your Avid brakes.
Protect yourself! Wear your safety gear!
BB7 & BB5 mountain & road
introduction
Avid caliper assemblies need to be serviced in order to optimize braking function. If caliper brake piston motion is ‘sticky’ or
lacks a positive and smooth return, the caliper body/brake piston o-ring may be out of place or damaged. Inspection and/or
replacement of these parts, due to any of the above situations, will be necessary to restore proper brake function.
caliper overhaul disassembly service instructions
Troubleshooting (not pictured)
The most common issue with the BB7 is that the
outboard pressure foot can become dislodged if
the outboard adjustment knob is turned too far
clockwise without the rotor in the caliper (wheel
off or caliper removed). The brake is not broken,
nor does it require disassembly to replace the
pressure foot. To replace the pressure foot, turn
the outboard adjuster knob counter-clockwise
until it stops. If the knob doesn’t stop, then the
foot screw (the end of which can be seen in the
center of the knob) has become disengaged
from the knob and possibly from the threads
inside the drive cam. In this case, remove the
knob, then using a pair of small needle-nose
pliers or a schrader valve tool, turn the foot
screw all the way back out until it stops. Now
the pressure foot can be replaced. Relocate the
pressure foot into the bore, then give it a firm
push in the center. It will click back into place.
If you removed the knob, replace it and you’re
done!
Getting Started
1. Remove the cable anchor bolt and plate, then
pull the cable housing and inner wire free of the
caliper. Remove the rubber cable boots.
Remove the Brake Pads
2. Turn both adjuster knobs all the way out
(counter-clockwise), then squeeze the pad tabs
together and pull both pads and pad spring clip
straight out of the caliper.
5
1
2
caliper overhaul disassembly service instructions (continued)
remove the outboard knob
3. Remove the outboard pad knob with a small
flat-head screwdriver. Be careful not to mar the
surface of the torque arm.
4. Turn the foot screw which is now exposed
counter-clockwise until it stops.
3
4
5
remove torque arm
5. Hold the spring loaded torque arm securely in
place.
6. Remove the torque arm fixing nut using an
11 mm wrench. Remove the lockwasher.
7. Remove the torque arm, outer body seal, and
spring. Then remove the hex-hole washer.
foot screw
6
7
8
9
10
11
12
13
remove drive cam/outboard pressure foot assembly
8. Using a 5 mm hex, remove the 2 caliper body
bolts.
note: the bolts are different lengths.
9. Carefully remove the inboard caliper body half
and set aside.
10. Remove the pad retaining clip and set aside.
11. Pull out the drive cam/outboard pressure foot
assembly. Be careful not to lose any of the three
ball bearings.
12. Use a 5 mm hex to remove the outboard caliper
body half from the bike and set aside.
drive cam disassembly
13. Use small needle-nose pliers or a schrader valve
core tool to turn the foot screw clockwise until
it is completely unthreaded from the drive cam.
This will separate the outer pressure foot from
the cam assembly. Remove the foot screw from
the drive cam.
remove pressure foot
14. Using a T25 TORX®, turn the inboard pressure
foot clockwise until it is free from the inboard
caliper body half.
14
6
caliper overhaul cleaning & inspection instructions
17
16
cleaning
15. Clean all metal parts in alcohol, including the
cable anchor bolt and plate. Clean the cable seal
boots and outer caliper body seal in mild soap
and water. Rinse and dry all parts completely
(not pictured).
caliper body inspection
16. Inspect both caliper body halves for any damage;
pay close attention to all threaded surfaces.
18
small part inspection
17. Check ball bearing and cam ramps for excessive
wear.
note: it is normal to see ball tracks in the cam
ramps.
18. Check the threads of the drive cam, foot screw,
inner pressure foot, cable anchor bolt, and
torque arm fixing nut for damage.
19. Check the spring for any signs of damage.
20. Check the cable seal boots for nicks, tears, or
cracking.
19
20
caliper overhaul assembly service instructions
assemble caliper
21. Very lightly grease the inner pressure foot
threads.
22. Using a T25 TORX®, thread the inner
pressure foot into the outboard caliper body half
until the pressure foot is flush with the inner face
of the caliper body.
23. Very lightly grease the foot screw threads, tip of
stem-end on outer pressure foot, and the ramps
of the drive cam.
24. Using small needle-nose pliers or a Schrader
valve tool, thread the foot screw into the drive
cam completely, but do not tighten.
21
22
23
24
grease
grease
grease
7
caliper overhaul assembly service instructions
assemble caliper (cont)
25. Insert the stem-end of the outer pressure foot
into the hole in the end of the drive cam and
install by firmly pressing it straight in.
26. Lightly grease the ramps of the fixed cam in the
outboard caliper body.
27. Place the ball bearings into the ramps of the
fixed cam.
28. Insert the Drive Cam/Outer Pressure Foot
assembly through the hole in the outboard
caliper body. Rotate the cams against each other
to ensure the ball bearings are seated properly in
both sets of ramps.
29. Apply a high-strength thread-lock such as
Loctite 272 to the drive cam threads.
25
26
28
29
27
important: be careful not to allow any threadlock to enter the area around the foot screw.
30. Hold the Drive Cam in place and re-install the
return spring, outer seal, and washer with hexshaped hole.
note: the spring leg that extends away from the
spring should point away from the caliper body.
the notch in the outer seal should face away
from the caliper body and be located underneath
the spring leg.
31. Install the torque arm, aligning the spring leg
with the spring tension notch on the back of the
torque arm. When engaged correctly, the spring
adjuster screw will be driven against the spring
leg on the back of the torque arm. Press the
torque arm onto the flats of the drive cam shaft.
Make sure the arm is fully seated and hold firmly
with your thumb.
32. Place the lockwasher on the drive cam with the
rounded side toward the caliper body. Thread on
the torque arm fixing nut by hand, then torque to
6.3-6.7 N•m.
30
31
extended
leg
notch
spring tension
notch
32
33
note: be careful to keep the pad retainer in place
while joining the halves together.
8
34
pad retainer
important: do not over tighten the torque arm
fixing nut.
33. Install the outboard adjuster knob by aligning the
rectangle tab of the foot screw with the
rectangular hole in the the knob, then press it on
firmly.
34. Re-install the pad retainer in the outboard
caliper body.
35. Apply a high-strength thread-lock such as
Loctite 272 to the 2 caliper bolts.
36. Align both caliper halves together and insert the
caliper body bolts. The short bolt goes in the hole
near the cable anchor, and the long bolt goes in
the hole near the housing stop. Torque both bolts
to 8.5-10.1 N•m.
spring
tension
notch
35
36
caliper overhaul assembly service instructions
install the new pads and spring.
37. Assemble the spring between the new left and
right pads. Align the spring to the pad as shown.
Squeeze the brake pad and spring clip assembly
together then press firmly into the caliper until it
“clicks” into place. The pad marked “R” goes on
the spoke side of the brake.
38. Push the upper and lower boots onto the
integrated cable stop.
39. Place the cable anchor plate on the cable anchor
bolt, grease the bolt lightly and install into the
torque arm. (not pictured)
40. Re-mount the caliper onto the bike.
41. Set up the brake by following the procedures
in the Avid Ball Bearing Disc Brake Installation
Guidelines. Be sure to torque to the proper
value.
37
38
40
completing ball bearing disc brake caliper overhaul
You are almost ready to ride, but first it’s a good idea to test your brakes by pulling on the lever extremely hard (as hard as you
can imagine yourself pulling the lever while you’re riding) several times. Check that the caliper closes and returns properly.
Make one last check of all the bolts and fittings.
If everything checks out, YOU ARE READY TO RIDE!
9
bb7 & BB5 mountain & Road
introduction
Avid brake pads should be replaced when the total thickness of the backing plate and pad friction material is less than 3mm.
Replacing worn brake pads will improve braking performance. New brake pads are subject to a “bed-in” period. It may take
anywhere from 20 to 40 complete stops to break in Avid pads. You may begin to notice an increase in braking power after the
first ride. Brake noise can occur during the break-in period, as well as off and on throughout the life of the brake pads. This is
normal and should not affect braking performance. Noise is dependent upon factors such as brake setup, rider weight, riding
style, braking style, and riding conditions (i.e. dust, soil, and contamination of friction surfaces).
brake pad installation instructions
remove the old pads
1. BB7 only: Turn both adjuster knobs all the way
out (counter-clockwise), then squeeze the pad
tabs together and pull both pads and pad spring
clip straight out of the caliper.
BB5 only: Turn the inboard adjuster knob all
the way out (counter-clockwise). Pull the pad
spreader clip from between the pads, then
remove the pads out of the caliper one at a time.
2. Inspect and measure the total thickness of each
brake pad with a ruler. If the total thickness is
less than 3 mm, you need to replace both brake
pads (not pictured).
1
BB7
BB7
BB5
BB5
BB5
BB5
note: if the backing plate and pad material is
thicker than 3 mm, you can simply re-install your
brake pads as outlined in step 3 and follow the
procedures for pad wear adjustment.
10
pad replacement (continued)
install the new pads and spring
3. BB7 only: Assemble the spring between the new
left and right pads. Align the spring to the pad as
shown. Squeeze the brake pad and spring clip
assembly together then press firmly into the
caliper until it “clicks” into place. The pad
marked “R” goes on the spoke side of the brake.
BB5 only: Install the new pads one at a time into
the caliper. Slide the spreader clip into position,
between the pads.
3
BB7
BB7
BB5
BB5
pad wear adjustment (not pictured)
BB7 only: The BB7 has a manual pad wear
adjustment feature. You can use this feature to
compensate for brake pad wear until the pads
need to be replaced with two very simple
adjustments: Turn both the inboard and
outboard red adjusting knobs clockwise one
or two clicks as needed to restore your brake
to optimum settings. Do NOT use your barrel
adjuster to compensate for pad wear. A pad
wear indicator is at the center of each knob. As
the knob is turned in, the indicator will retract
deeper into the knob giving a visual indication of
approximately how much the pads have worn.
BB5 only: The BB7 has a manual pad wear
adjustment feature. You can use this feature to
compensate for brake pad wear until the pads
need to be replaced with two very simple
adjustments: Unscrew (counter-clockwise) the
barrel adjuster on the caliper. Turn the inboard
pad adjustment knob clockwise. Both of these
adjustments move the brake pads closer to the
rotor. You do need to adjust both pads they
wear. Try different settings until the brake feels
just the way you like.
important: make sure you tighten the locknut on
the barrel adjuster after you adjust.
note: while you can perform a simlar adjustment on the barrel of your brake lever, we suggest that you adjust for pad wear at the caliper.
that way you leave the brake lever for on-the-fly
adjustments.
this concludes the disc brake pad replacement
instructions. you have done a great job! you are
now ready to ride. enjoy!
11
BB5
disc brake pad and rotor bed-in procedure
All new brake pads and rotors should be put through a wear-in process called ‘bed-in’. The bed-in procedure, which should be
performed prior to your first ride, ensures the most consistent and powerful braking feel along with the quietest braking in most
riding conditions. The bed-in process heats up the brake pads and rotors which deposits an even layer of brake pad material
(transfer layer) to the braking surface of the rotor. It is this transfer layer that optimizes braking performance.
Wa r n i n g :
The bed-in process requires you to perform heavy braking. You must be familiar with the power and operation of disc
brakes. Braking heavily when not familiar with the power and operation of disc brakes could cause you to lose control of
your bicycle, which could lead to a crash and could lead to serious injury and/or death. If you are unfamiliar with the power
and operation of disc brakes, you should have the bed-in process performed by a qualified bicycle mechanic.
i m p o r ta n t:
To safely achieve optimal results, remain seated on
the bike during the entire bed-in procedure.
1
Accelerate the bike to a moderate speed, then firmly apply the
brakes until you are at walking speed. Repeat approximately
twenty times.
2
Accelerate the bike to a faster speed. Then very firmly apply
the brakes until you are at walking speed. Repeat
approximately ten times.
i m p o r ta n t:
Do not lock up the wheels at any point during the bed-in procedure.
3
12
Allow the brakes to cool prior to any additional riding.
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