Run a current-spec 30mm-spindle crankset in a T47 threaded frame. Enduro's T47 External bottom bracket threads straight into the shell and carries 440C stainless steel angular contact bearings, Enduro's pick for wet weather and frequent washing.

Highlights

• T47 External threaded bottom bracket for 30mm-spindle cranksets (spindles 104mm or longer)
• Machined aluminium T47 cups thread directly into the shell
• 440C stainless steel balls and races for long life and corrosion resistance
• LLB-type seals to help keep water out
• Machined aluminium preload adjuster and a full set of chainline spacers included
• Black finish

Threaded T47 cups

Enduro presses the angular contact bearings into precision-machined aluminium T47 cups that thread directly into the frame's T47 shell. Enduro makes its bottom brackets at its own production facility in California, USA.

Stainless bearings & seals

This is a complete bottom bracket built around 440C stainless steel balls and races in an angular contact layout. Enduro is upfront that stainless steel carries about 20% less load than its standard 52100 chromium steel and is slightly softer, but it chooses stainless where corrosion is the bigger enemy: wet rides, road salt, sweat, spilled sports drinks and frequent washing. LLB-type seals and a water-resistant grease fill add another layer of protection against the elements.

Fitting & servicing

The 15° angular contact bearings need a light preload for the best adjustment. Some cranksets have a preload system built in; if yours doesn't, or it's plastic, use the machined aluminium preload adjuster in the box, along with the full set of spacers for precise chainline adjustment.

Our workshop can fit it for you as a separate service. Enduro also asks for its stainless bottom bracket bearings to be cleaned and re-greased by a qualified mechanic every six months to keep the warranty valid, and we can look after that too.

Compatibility & fit

• Frame: T47 threaded bottom bracket shell (External version)
• Crankset: 30mm-spindle cranksets with spindles 104mm or longer
• Check your frame's shell standard and your crank's spindle before ordering, or ask our workshop to confirm the fit.