Shimano Square Taper Bottom Brackets (BB-UN55) | Achetez sur eBay
What is the difference between this Shimano BB-UN50 and the BB-UN55 ? The former is hard to find for sale, the latter seems to be found everywhere : r/bikewrench
BB-UN55 – LE TOUR DE Thierry
BOITIER AXE PEDALIER Shimano Bb Un55 Old Bike Vecchia Bici Velo Ancien EUR 10,00 - PicClick FR
Shimano BB-UN55 MTB / Road Bottom Bracket - 68mm | High on Bikes
Shimano BB-UN55 68mm Square Taper Bottom Bracket - Rebec and Kroes Cycle & Sport