Odyssey Springfield BMX U-Brake - Rear - Sunday Blue 51mm Features include a diamond shape

Features include a diamond shape tread pattern for straight-line grip

These grips are approx 4-1/4" long and sealed in the bag

It comes with 4 bearings

This is a chromoly BMX spindle for 8 spline 19mm cranks

and stiffness

Odyssey Springfield BMX U-Brake - Rear - Sunday Blue 51mm Features include a diamond shapeOdyssey dsigned the Springfield brake to be affordable, as well as easier to install (and remove) without sacrificing performance. The Springfield 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. The brake arms are designed to maximize stiffness and save weight