Shimano TL-FC37 Bottom Bracket Tool Insert

The Shimano TL-FC37 bottom bracket tool socket is the impact wrench version of the TL-FC25, designed for those fitting and removing bottom brackets mainly in the workshop. It has a 1/2" female square drive for an impact wrench or ratchet, or 32 mm spanner flats.

It is made from hardened steel and has precision teeth for a secure grip on the bottom bracket. It is compatible with SM-BBR60 Hollowtech II, as well as SM-BBR60, BB-MT800 and BB-MT801. To choose between the two drive options, consider the tool you use: the 1/2" square drive with an impact wrench, or the 32 mm flats with an open-ended spanner.

Founded in 1921 in Sakai, Japan, by Shozaburo Shimano, Shimano is still based in the same city today. For cyclists, it makes drivetrains, brakes, wheels, pedals and cycling shoes. Its history in bicycle components began with the production of freewheels in 1922.