The Wheels Manufacturing T47 Outboard Bottom Bracket is designed to fit bikes with T47 bottom bracket shells ranging from 68mm to 100mm. It is compatible with 30mm spindle cranks and features high-quality angular contact bearings for smooth and efficient performance. The bottom bracket cups are made from durable aluminum alloy and are designed to reduce bearing drag and extend the lifespan of the bottom bracket. The bottom bracket is easy to install and includes spacers to ensure proper chainline. The bottom bracket is backed by Wheels Manufacturing’s limited lifetime warranty.