Park Tool BBT-RS Bottom Bracket Tool Retaining System 31.6mm x 20mm offset tapered nose-to-wing transition

tapered nose-to-wing transition

The SHIMANO GRX 12-speed rear derailleur also features an integrated chain stabilizer that delivers quieter shifting and more secure chain management during rough rides

Recommended for use in cool to cold conditions

A key accessory for chilly starts or changeable weather

seat rails

Park Tool BBT-RS Bottom Bracket Tool Retaining System 31.6mm x 20mm offset tapered nose-to-wing transitionBottom 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 BBT RS uses a spring based tension system to apply consistent,