Bottom Brackets
IRD QB-55 JIS Square Taper Bottom Bracket $29.99 each
- QB-75 has alloy cups and body with a plated CrMo spindle (avg. wt. 235g)
- QB-55 is our more affordable model with steel cups, alloy body, but it still has a plated CrMo spindle (68mm and 73mm sizes available)
- Italian threaded replacement cups available(aluminum)
- Sealed cartridge bearings
- Made in Japan by Tange Seiki
