![Shimano Bb Un55 Square Taper Bottom Bracket | Bottom Bracket Road Bicycle Shimano - Bicycle Bottom Brackets - Aliexpress Shimano Bb Un55 Square Taper Bottom Bracket | Bottom Bracket Road Bicycle Shimano - Bicycle Bottom Brackets - Aliexpress](https://ae01.alicdn.com/kf/H773d3568c30b40b6a740871e67a335e7e.jpg_640x640Q90.jpg_.webp)
Shimano Bb Un55 Square Taper Bottom Bracket | Bottom Bracket Road Bicycle Shimano - Bicycle Bottom Brackets - 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 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](https://preview.redd.it/0rebayvg94851.jpg?width=640&crop=smart&auto=webp&s=2214088adb5fc8fa4040e00baa4f34208a1f8053)
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
![Shimano BB-UN55 68x113 JIS Square Taper Bottom Bracket, new/open box - bicycle parts - by owner - bike sale - craigslist Shimano BB-UN55 68x113 JIS Square Taper Bottom Bracket, new/open box - bicycle parts - by owner - bike sale - craigslist](https://images.craigslist.org/00o0o_6Oe7jENLHff_0CI0t2_600x450.jpg)