Shimano Ultegra BR-RS811-R Road Caliper Brake - Rear Under Bottom Bracket Direct Mount BLK Model=Boyd Sprocket 6061 alloy body with 4140

6061 alloy body with 4140 heat treated broached spindle

5/3/4/5/6/8/10mm keys and holder

Disc Center Lock Hub Model Solix G Valve Presta Position Front and Rear Rim Drilling F: 24 R: 24 Depth 19mm Rim Material Carbon Wheel Diameter/ISO 700C / 622 Wheel Tire Type Tubeless Ready Wheel Weight 1320g Rim Model UL250c Spoke Type I9 Aluminum Axle Type F: 12mm R: 12mm Hub Spacing F: 100 R: 142 Rim Color Black

ultimate suppleness and comfort

Comes in a sealable bag

Shimano Ultegra BR-RS811-R Road Caliper Brake - Rear Under Bottom Bracket Direct Mount BLK Model=Boyd Sprocket 6061 alloy body with 4140The Shimano BR RS811 R under bottom bracket mount road brake caliper provides an exceptional balance of rigidity weight and stopping power. Features a sleek and integrated low profile design that is compatible with 20. 8 28mm wide rims and up to 28C sized tires. Exceptional balance of rigidity weight and stopping power Sleek and integrated low profile caliper design Compatible with 20. 8 28mm wide rims and up to 28C sized tires Includes R55C4