SHIMANO BR-RS811 CALIPER BRAKEThe latest in rim brake technologyThe BR-RS811 is Shimano's sleek new direct mount rim brake that offers a terrific balance between performance and price point. With SLR-EV technology the caliper features reduces friction at the pivot area, resulting in improved response and efficiency. Not to mention the two bearing and one roller structure further improves efficiency in the pivot area. With its low-profile design and support for under bottom bracket mounts you'll never have to worry about not achieving maximum aero benefits. Tire clearance for up to 28c tires ensures you can run your favorite tires without having to think twice. FeaturesSLR-EV technology improves caliper response and efficiencyUnder bottom bracket mount support makes this caliper compatible with even the most aerodynamic of bikes28c tire clearance lets you run your favorite wider road tiresBrake mount type: Direct MountReach: 51mmR55C4 brake pads includedCarbon rim compatible pads sold separately | Shimano | BR-RS811 CALIPER BRAKE REAR