SHIMANO BB-UN55 Jeu de pédalier, BB-UN55, Silver, 70-107mm : Amazon.fr: Sports et Loisirs
Shimano – support inférieur un55, 70/118mm, b/Bolt (ebbun55i18) - AliExpress
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
BOITIER AXE PEDALIER Shimano Bb Un55 Old Bike Vecchia Bici Velo Ancien EUR 10,00 - PicClick FR
SUPPORT INFÉRIEUR SHIMANO BB-UN52 108 mm 36x24T carré fileté italien vintage neuf dans son emballage d'origine EUR 63,35 - PicClick FR