Shimano BB-UN300 Bottom Bracket - English | 73 x 118mm Spindle - Square Taper JIS Shoe Covers the three Torx sizes most

the three Torx sizes most commonly found on modern bicycle components including disc brake rotors

better-shifting replacement and a smart spare to keep on hand for race day

The waterproof roll-top closure seals tight and stays sealed

powerful fit

or have lost their texture are a cheap fix that makes a noticeable difference in cockpit feel

Shimano BB-UN300 Bottom Bracket - English | 73 x 118mm Spindle - Square Taper JIS Shoe Covers the three Torx sizes mostWhich bikes use the Shimano BB UN300 73 x 118mm Bottom Bracket? The Shimano BB UN300 73 x 118mm is the benchmark square taper bottom bracket for mountain and wide shell bikes, a cartridge bearing design that delivers Shimano quality and smooth, consistent rotation in a sealed unit compatible with square taper JIS cranks. The 73mm English threaded shell and 118mm hollow spindle cover the common mountain bike and wider Q factor configuration, so if your