Shimano Ultegra BR-RS811-R Road Caliper Brake - Rear Under Bottom Bracket Direct Mount BLK Model=Boyd Sprocket Separate and independent Open and

Separate and independent Open and Pedal pistons for optimum tunability

A truly all terrain tire designed for grip on snow hard pack loose dirt or grass via its well spaced large square knobs

6061 alloy body with 4140 heat treated broached spindle

Aither is a multi-cell foam compound that forms the structure of the Armour Labeled Size 24 x 1

Shimano Ultegra BR-RS811-R Road Caliper Brake - Rear Under Bottom Bracket Direct Mount BLK Model=Boyd Sprocket Separate and independent Open andThe 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