This bottom bracket shell is machined from 1-5/8" x .150" wall 3-2.5 titanium tubing. The outside diameter is the stock tube diameter. The width is 68.5 mm, supplied .5 mm oversize to allow clean up after welding. The threads are 1.370"-24, right and left hand, and the thread length is .50". The left hand thread is identified by a radial groove on the face of the shell. The minor diameter of the thread is 1.330"/1.340". It is relieved on the inside diameter to 1.385"/1.395".
- This threaded bottom bracket shells is 1.37" x 24 threads per inch and right and left threaded (also known as British Standard, ISO/English or BSA), making it compatible with all modern threaded bottom bracket spindles.
- Use our heatsink FT5002 (see Related Products on this page).
Item sold individually.
Photo courtesy of Triton Bikes.