RaceFace CINCH Bottom Bracket: BSA 83mm Shell x 30mm Spindle External Seal MFPN=TJB-MT2 The material on the outside

The material on the outside of the jacket is made from 80% Tencel and 20% merino wool

Fischer has two strips of mohair which are offset front and back so there is less resistance towards the ends of the kick zone

5mm center knobs and 3mm side knobs

in the workstand or hanging out on your hitch rack at the trailhead

59 degree engagement

RaceFace CINCH Bottom Bracket: BSA 83mm Shell x 30mm Spindle External Seal MFPN=TJB-MT2 The material on the outsideRaceFace CINCH Bottom Bracket: BSA 83mm Shell x 30mm Spindle External Seal. Race Face bottom brackets for use with 30mm spindle cranksets in the Race Face CINCH crank family. TECH SPECS Defined Color Black Bottom Bracket Shell I. D. 1. 37 Spindle Interface Type RaceFace Easton CINCH Spindle Interface Type 386 EVO Spindle Interface Type Rotor 3D+ Spindle Interface Type e*Thirteen P3 Connect Spindle Interface Type Zipp Vuma Weight 87 BB Shell Width (mm)