Wolf Tooth T47 Inboard Bottom Bracket

Inboard refers to the design where the bearings sit inside the frame shell rather than sitting externally. This creates a cleaner aesthetic and often allows for better compatibility with a wider range of cranksets.

This unit is designed specifically for frames with a T47 internal bottom bracket shell, featuring a 47mm diameter and 85.5mm width. You must verify that your frame uses the T47 standard before purchasing, as it is not compatible with BSA or PressFit standards.

Wolf Tooth uses specialized spindle bushings that separate the bearing's inner race from the crank spindle. By eliminating direct metal-on-metal contact, the system prevents the friction that typically causes persistent creaking.

Yes, it is built for harsh environments. It features a multi-layered sealing system, including o-rings on the spindle and inner shell, plus a wiper connection seal between the bearing and end cap to keep water and grit out of the bearings.

This specific model is designed for a 29mm spindle diameter. Please ensure your crankset matches this measurement, as it will not fit 24mm or 30mm spindles.