Bushnell Eccentric Classic Bottom Brackets

​The Problem Solvers Bushnell Eccentric Bottom Bracket is the industry leading design for chain tension adjustment on tandem and dedicated single speed bikes equipped with eccentric bottom bracket shells. This tried-and-true design is easy to install and fine-tune to your ideal placement and holds standard, English threaded bottom bracket cups. The classic version features full-body, aluminum construction across the shell for maximum surface area friction and additional value.​ Bushnell Eccentric Bottom Bracket Instructions