![]() Now reassemble the brake arms and parallel-push cages including adding one or more rotor spacers between the brake arm and the parallel-push pivot cage to take up most of the slack.You now can push out the parallel-push cage pivot. Remove the 2mm Allen set screw from each brake arm.Take a photo of a parallel-push cage to remember the order of existing spacer and spring.Using a utility knife, peel off the silver stickers from the ends of the parallel-push cage pivot.On your workbench, remove the brake pads.Remove the brake arms from the bike using a 5mm Allen key.Firstly, buy some disk brake rotor spacer/washers from a bike shop and super glue from the local supermarket, hardware store etc.This works the same as the tune-up kit did. Shimano parallel-push V-brake tune-up kits have all but dried up so I fixed my squealing XT parallel-push V-brakes by adding disc brake rotor washers to tighten up the parallel-push pivot cage. A direct-pull brake only stops working if the cable parts. If the front wheel, the rider will pitch forward. If the main cable of a traditional cantilever brake fails, the transverse cable can snag on a knobby tire and lock the wheel. This increases the mechanical advantage of the system, requiring the use of special matching brake levers.ĭirect-pull brakes also avoid a serious risk. Since the cable runs straight across the top of the tire, direct pull cantis need longer arms to get the cable high enough to clear the tire. ![]() When the brake is applied, the housing pushes on one cantilever while the inner cable pulls the other. The cable housing connects to one arm, and the inner cable runs across the top of the tire to the opposite arm. The "direct pull" cantilever, also commonly known under its Shimano trademark name "V-Brake" is a simpler design, using only a single cable. The main cable would pull upward on the middle of the transverse cable, causing the cantilever units to rotate inward. Traditional cantilever brakes used two cables, a main cable running down the centerline of the bike, and a second, "transverse" cable connecting the cantilever units on each side of the wheel.
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