9
2.6a Fit front AVID BB7disc brake wheels and brakes
The brake calipers have been fastened to the
kingposts, but they need to have the calipers
aligned and the pads adjusted.
Make sure the Caliper Positioning System (CPS)
bolts are loose.
Fit the disc brake rotors to each wheel using 6
bolts per rotor. Set the rotor to rotate in the
direction indicated on the rotor. Tighten the rotor
bolts with a
T-25 Torx bit to 6-7nm or 4.5-5 lb. ft.
Locate the front wheel 12mm axle bolts. Remove the nuts and washers, and partially insert them in wheels
from the outside (the brake rotor is on the inside) so they don’t protrude on the inside of the wheel. Put the
wheel up to the kingpost, sliding the rotor gently into the brake calliper, until the axle bolt is aligned with the
hole in the kingpost. Push the axle bolt through the kingpost and put the washer and the M6 nylock nut onto
the axle bolt which is protruding on the inside of the kingpost. Tighten using a 13mm (1/2”) wrench and a
10mm wrench are needed to tighten the front wheels. After the first time the nut has been installed and
removed, the 13mm wrench will not be necessary; you can lock the axle in place by leaning gently on the
wheel. It is important that these bolts are tight; you will not damage the bearing by tightening to the required
torque.
Repeat the fitting procedure for the other wheel.
The brake cable has been clamped onto the
actuating arm, but it should be checked to
make sure that it is tight. Use the barrel
adjuster at the brake lever to remove any cable
slack. Be careful not to advance the actuating
arm by pulling on the cable.
With the CPS bolts loose,
turn the outboard
(closest to the wheel) knob clockwise until it
pushes the rotor into the position shown. This
knob is sometimes quite stiff and a T25 Torx®
key can be used to make it easier to turn.
Note
that the rotor should not be centered between
the walls of the caliper body
