BSA
The BSA bottom bracket is the most popular and reliable threaded bicycle standard. Also known as “English” or “BSC” threading, it features two separate bearing cups (one for each side of the frame) that screw directly into threads inside the bike frame’s bottom bracket shell.
- Thread Standard: 1.37″* 24 TPI (24 threads per inch).
- Shell Inside Diameter: 33.7mm to 34.8 mm
- Shell Widths:
- Road Bikes: 68 mm wide.
- Mountain Bikes (MTB):73 mm wide.
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Bottom Bracket Adapters: BSA/ITA to BB386
$59.99 Select options This product has multiple variants. The options may be chosen on the product page -
BSA Threaded Bottom Bracket (68mm~73mm) for SRAM GXP
$49.99 Add to cart -
BSA-Threaded Bottom Bracket (68mm~73mm) for Shimano Hollowtech II
$49.99 Select options This product has multiple variants. The options may be chosen on the product page
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