Springfield U-Brake Color:Black 55R/57-A is designed for use

55R/57-A is designed for use with 62mm outside diameter head tubes and features high performance 1

Lever upgrade kit comes with 2P cam

350 hub with straight pull spokes

Comes with 2-piston caliper

For use with 62mm outside diameter head tubes

Springfield U-Brake Color:Black 55R/57-A is designed for useThe Springfield U brake drops the two ordinary (and confusing) brake springs and replaces them with one central spring that applies the same force to each arm, requiring no additional adjustment. This makes assembly incredibly easy just bolt it on and go. Aluminum brake arms are designed to maximize stiffness and save weight One spring design provides hassle free installation More clearance for larger tires U brake can be used for front or rear Comes