Wheels Manufacturing T47A BB

The 'A' stands for Asymmetrical. This specific version is designed for frames with an asymmetrical bottom bracket shell, typically found on certain Cervélo models. You must ensure your frame specifically requires the T47A standard, as it is not interchangeable with standard T47 bottom brackets.

No. This specific model is designed exclusively for 24mm spindle cranks, such as those from Shimano. If you have a 30mm spindle, you will need a different bottom bracket configuration.

You will need a bottom bracket tool compatible with a 48.5mm, 16-notch pattern. This is a standard size used by many major tool manufacturers for external bearing bottom brackets.

Yes. The system uses Enduro ABEC-3 bearings that are designed to be easily serviced or replaced. This allows you to maintain the bottom bracket over time rather than replacing the entire unit when the bearings eventually wear out.

The sleeve acts as a barrier to keep dirt and moisture out of the bearings and prevents internal cables or hydraulic hoses from rubbing against the crank spindle. We strongly recommend installing it to ensure smooth operation and protect your frame's internal components.

The drive side cup is left-hand threaded, meaning you turn it counter-clockwise to tighten. The non-drive side cup is right-hand threaded, which tightens clockwise. Always grease the threads before installation to prevent seizing.