Shimano Altus Rear Cantilevers Brake Silver with Brake Blocks MTB & Cyclocross. These alloy cantilever brakes feature a polished silver finish, making them ideal for mountain, cyclo-cross, and touring bikes. They come as a pair to fit the rear of your bike and include Shimano brake blocks for reliable stopping power. The spring tension adjuster allows for easy brake setup, and the side mount brake pads facilitate simple pad replacement. Color: Black / Silver. Content: 1 Pair Rear Cantilevers.