More information about Associated Disc Brake Steel Cam GT ASC7555Associated replacement disc brake cam that comes with their Nitro Trucks. Direct fit replacement part. Made of 1/16" thick brass, prebent. This applies the pressure to the brake shoe to stop the truck. If there are any burrs on the end of the cam remove them because the cam clip may break during installation. One brake cam clip is used, there is one extra. The top goes over the spur gear and the loop connects to the linkage to the throttle/brake servo.