Wolf Tooth T47 Internal Bottom Bracket

Yes, this bottom bracket is specifically designed for 24mm spindles, which is the standard interface for Shimano Hollowtech II cranksets.

An internal T47 bottom bracket sits entirely inside the frame shell, offering a cleaner look and potentially better compatibility with certain frame designs compared to external versions where the bearing cups protrude.

Wolf Tooth uses specific spindle bushings to eliminate metal-on-metal contact between the crank spindle and the bearings, which is the primary source of creaking in many bottom bracket systems.

Yes, the bearings are designed to be serviceable. You can clean and re-grease them to extend their lifespan, which is a significant advantage for riders who frequently ride in wet or muddy conditions.

It uses a combination of O-rings, a wiper seal, and a labyrinth seal to create a robust barrier against water, grit, and mud, ensuring the bearings stay protected even in harsh weather.

This specific model is designed for an 85.5mm shell width. Please double-check your frame's specifications, as T47 shell widths can vary slightly depending on the manufacturer.