Review on 🚴 SHIMANO BB-UN300 Bottom Bracket English 68 x 110mm Spindle Square Taper JIS: Premium Performance and Durability by Bryan Sperling

I bought this as part of an overhaul on my entry level road bike. The factory bottom bracket was supposed to be a sealed bearing design, but it turned out not to be, and it was full of sand and metal shavings since the bike was made. This BB was used as a direct replacement and as part of a general upgrade to a matching groupset. The difference between the factory BB and this day and night is that the Shimano turns much more freely and with significantly less drag. I expect that component alone will make a big difference in my cycling. 10/10, would buy again without a doubt.