![Amazon.com : SHIMANO BB-UN300 Bottom Bracket - English, 68 x 110mm Spindle, Square Taper JIS : Sports & Outdoors Amazon.com : SHIMANO BB-UN300 Bottom Bracket - English, 68 x 110mm Spindle, Square Taper JIS : Sports & Outdoors](https://m.media-amazon.com/images/I/71RMNoIRjeL._AC_UF1000,1000_QL80_.jpg)
Amazon.com : SHIMANO BB-UN300 Bottom Bracket - English, 68 x 110mm Spindle, Square Taper JIS : Sports & Outdoors
![Shimano BB-UN26 BB-UN300 BB-UN101 Bottom Bracket Square Hole 68/73mm Bicycle Axis BB MTB Road Bike Bottom Bracket UN26 UN101 Shimano BB-UN26 BB-UN300 BB-UN101 Bottom Bracket Square Hole 68/73mm Bicycle Axis BB MTB Road Bike Bottom Bracket UN26 UN101](https://ae01.alicdn.com/kf/Ha7af5b7fc70a47a19abb34d57ea62b9af/Shimano-BB-UN26-BB-UN300-BB-UN101-Bottom-Bracket-Square-Hole-68-73mm-Bicycle-Axis-BB.jpg)
Shimano BB-UN26 BB-UN300 BB-UN101 Bottom Bracket Square Hole 68/73mm Bicycle Axis BB MTB Road Bike Bottom Bracket UN26 UN101
![BB-UN300 drive side won't thread in (counter-clockwise to tighten)! Driving me nutz. The non-drive side threads just fine (clockwise to tighten). What's happening here? : r/bikewrench BB-UN300 drive side won't thread in (counter-clockwise to tighten)! Driving me nutz. The non-drive side threads just fine (clockwise to tighten). What's happening here? : r/bikewrench](https://preview.redd.it/g7a1metnduu61.jpg?width=640&crop=smart&auto=webp&s=0ef8d063f119ba6c4403d05b27d89b0e08b3d062)
BB-UN300 drive side won't thread in (counter-clockwise to tighten)! Driving me nutz. The non-drive side threads just fine (clockwise to tighten). What's happening here? : r/bikewrench
![Shimano UN300 Square Taper English MTB Bottom Bracket (Silver) (BSA) (73mm) (123mm) - Performance Bicycle Shimano UN300 Square Taper English MTB Bottom Bracket (Silver) (BSA) (73mm) (123mm) - Performance Bicycle](https://images.performancebike.com/images/large/bikes/shimano/ebbun300c23x.jpg)
Shimano UN300 Square Taper English MTB Bottom Bracket (Silver) (BSA) (73mm) (123mm) - Performance Bicycle
![BB-UN300 drive side won't thread in (counter-clockwise to tighten)! Driving me nutz. The non-drive side threads just fine (clockwise to tighten). What's happening here? : r/bikewrench BB-UN300 drive side won't thread in (counter-clockwise to tighten)! Driving me nutz. The non-drive side threads just fine (clockwise to tighten). What's happening here? : r/bikewrench](https://preview.redd.it/3bfkdhqnduu61.jpg?width=640&crop=smart&auto=webp&s=ef4688e57613355cff1f2b7f2588cb8e3471b24b)
BB-UN300 drive side won't thread in (counter-clockwise to tighten)! Driving me nutz. The non-drive side threads just fine (clockwise to tighten). What's happening here? : r/bikewrench
![Shimano Shimano BB-UN300 Bottom Bracket - English, 68 x 122.5mm Spindle, Square Taper JIS, 47.5mm Chainline - Dynamite Bike Lab Shimano Shimano BB-UN300 Bottom Bracket - English, 68 x 122.5mm Spindle, Square Taper JIS, 47.5mm Chainline - Dynamite Bike Lab](https://cdn.shoplightspeed.com/shops/666130/files/50216671/1500x1500x2/shimano-shimano-bb-un300-bottom-bracket-english-68.jpg)