Shimano BB-UN300 Square Taper Bottom Bracket for sale online | eBay
Shimano BB-UN300 Square Type Bottom Bracket
Measured my existing BB (pic1) and it landed between 122 and 123mm. Guess it's a 122,5mm right? Shimano UN-300 seems to have two models D-NL and LL123. What's the difference? I've also
Sealed Cartridge Bottom Bracket Removal And Replacement