Park Tool Bottom Bracket Retaining System Tool (BBT-RS) product-type_chain-locks Designed to accommodate 31

Designed to accommodate 31

Removable training wheels

It’s also fully biodegradable* and safe for metal

The GX Eagle chain is designed with SRAM's Eagle geometry

Simply Fast

Park Tool Bottom Bracket Retaining System Tool (BBT-RS) product-type_chain-locks Designed to accommodate 31About Park Tool Bottom Bracket Retaining System Tool (BBT RS) Bottom brackets have some of the highest torque specs of any component found on a bicycle. Despite this, some bottom bracket cups feature tool fittings that allow mere millimeters of engagement, which can be a problem when attempting removal or installation. Solution: the Park Tool Bottom Bracket Tool Retaining System. Used in conjunction with nearly any Park Tool bottom bracket tool, the