WHEELS Mfg T47A Bottom Bracket

The 'a' stands for asymmetrical. This bottom bracket is specifically designed for frames with an asymmetrical T47 shell width of 77.5mm to 79mm, often found on modern road and gravel bikes to accommodate specific drivetrain geometries.

Yes, this unit is precision-machined to fit 24mm spindle cranks, such as those from Shimano. It provides a direct, secure interface without the need for adapters.

The included sleeve acts as a barrier between the bearings and the inside of your frame. It keeps out debris and moisture while preventing internal cables or hoses from rubbing against the spinning spindle, which helps maintain smooth rotation over time.

Yes, the Enduro ABEC-3 bearings are fully serviceable. You can easily clean, grease, or replace them when necessary, which extends the overall lifespan of the bottom bracket compared to sealed, non-serviceable units.

You will need a bottom bracket tool with a 48.5mm x 16-notch interface. This is a standard size for many T47 bottom brackets, but it is worth double-checking your current toolset before starting the installation.

Yes, note the orientation: the drive-side cup uses a left-hand thread (tightens counter-clockwise), while the non-drive side uses a standard right-hand thread (tightens clockwise). Always grease the threads thoroughly before installation to ensure a creak-free fit.