MSW ST100 Bottom Bracket - English | 68 x 122.5mm | Square Taper JIS

Is the MSW ST100 the Right Bottom Bracket for Your Build?

The MSW ST100 Bottom Bracket is a dependable, no-fuss English-threaded square taper unit built for bikes running a JIS square taper crankset. The 68mm shell width covers the most common road and mountain bike frame standard, and the 122.5mm spindle length matches a wide range of JIS-compatible cranks for correct chainline and smooth pedaling mechanics. Steel cup construction delivers long-lasting durability in an everyday riding application where a serviceable, reliable interface matters more than grams saved.

Compatible with standard English (BSA) threaded bottom bracket shells, the ST100 threads in with the same tools used for any cup-and-spindle BB. Designed to work with JIS square taper cranks from a range of manufacturers, including entry to mid-level road and mountain drivetrains. A straightforward, proven solution for builds, rebuilds, and replacement applications where a reliable square taper bottom bracket is needed at a practical price.