SRAM Guide R Disc Brake - Black - 900mm HoseSRAM Guide R Disc Brake Black 900mm Hose This high quality 4 piston caliper disc brake gives you smooth, one finger control all across the mountain. Packed with some of the finest features and technologies such as Reach Adjust, you can customise its reach exactly how you want it. Comfortable and easy to use, this powerful model gives you flawless performance on every single ride. Additionally, this version also includes the World Championship winning