Straddle

 

Cable

 

Brake

Brake Cable

 

Straddle Hanger

Pinch Bolt

 

 

Straddle Cable

 

90o

 

Cable

 

Anchor

Pivot

Caliper Arm

Cantilever Brakes - Utilizing a Straddle Cable

The length of the straddle cable, the height of the straddle hanger, and the brake pad-to-caliper arm position all have an effect on brak- ing power. Generally, the straddle cable bridge is set low and close to the tire for maximum braking force. The straddle cable should be high enough, however, to adequately clear the tire (and any debris that may stick to the tire) or to fit over the front reflector hanger. In the event of brake cable failure, the front reflector hanger would prevent the straddle cable from catching in the tire and locking up the front wheel. The straddle cable length (when adjustable) is set to transfer as much force to the brake pads as possible. For the most efficient transfer of force, the straddle cable and the line between the cantilever pivot and the cable anchor should form a right angle (90 degrees). If the force is not at a right angle, part of the force gets wasted in pulling on the brake post, which has no effect on braking.

Brake pad aligned with the rim surface

Pad and rim should be parallel

Pad should be “toed-in”

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1- 2 mm

0.5 - 1.0 mm

51

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Image 58
Pacific Cycle HF3305 manual Pinch Bolt Straddle Cable 90o Anchor Pivot Caliper Arm