![Measured my existing BB (pic1) and it landed between 122 and 123mm. Guess it's a 122,5mm right? Shimano UN-300 seems to have two models D-NL and LL123. What's the difference? I've also Measured my existing BB (pic1) and it landed between 122 and 123mm. Guess it's a 122,5mm right? Shimano UN-300 seems to have two models D-NL and LL123. What's the difference? I've also](https://preview.redd.it/dobsmzq58nd81.jpg?width=640&crop=smart&auto=webp&s=1716cfca85d57dd7cbba094e0f733ead0d1c05d1)
Measured my existing BB (pic1) and it landed between 122 and 123mm. Guess it's a 122,5mm right? Shimano UN-300 seems to have two models D-NL and LL123. What's the difference? I've also
![SHIMANO BB-UN101 Bracket Axle length/shell width (mm)LL123 68/73 Square Type Bottom bearing square bottom bracket SHIMANO BB-UN101 Bracket Axle length/shell width (mm)LL123 68/73 Square Type Bottom bearing square bottom bracket](https://ae01.alicdn.com/kf/S76693f2663b74c0bbeea6c8251b3093cp.png)
SHIMANO BB-UN101 Bracket Axle length/shell width (mm)LL123 68/73 Square Type Bottom bearing square bottom bracket
![Shimano BB-UN300 bottom bracket British thread (LL123), Silver, 73-122.5 mm : Amazon.co.uk: Sports & Outdoors Shimano BB-UN300 bottom bracket British thread (LL123), Silver, 73-122.5 mm : Amazon.co.uk: Sports & Outdoors](https://m.media-amazon.com/images/I/41fm9maDhwL.jpg)
Shimano BB-UN300 bottom bracket British thread (LL123), Silver, 73-122.5 mm : Amazon.co.uk: Sports & Outdoors
![Shimano BB-UN300 bottom bracket British thread (LL123), Silver, 73-122.5 mm : Amazon.co.uk: Sports & Outdoors Shimano BB-UN300 bottom bracket British thread (LL123), Silver, 73-122.5 mm : Amazon.co.uk: Sports & Outdoors](https://images-eu.ssl-images-amazon.com/images/I/51KZ2F3RP1L._AC_UL600_SR600,600_.jpg)
Shimano BB-UN300 bottom bracket British thread (LL123), Silver, 73-122.5 mm : Amazon.co.uk: Sports & Outdoors
![Measured my existing BB (pic1) and it landed between 122 and 123mm. Guess it's a 122,5mm right? Shimano UN-300 seems to have two models D-NL and LL123. What's the difference? I've also Measured my existing BB (pic1) and it landed between 122 and 123mm. Guess it's a 122,5mm right? Shimano UN-300 seems to have two models D-NL and LL123. What's the difference? I've also](https://preview.redd.it/peiwd2d69nd81.jpg?width=640&crop=smart&auto=webp&s=01b455f593465867e326d45b449e526d7fa4568f)
Measured my existing BB (pic1) and it landed between 122 and 123mm. Guess it's a 122,5mm right? Shimano UN-300 seems to have two models D-NL and LL123. What's the difference? I've also
![Shimano Bb-un101/-k Square Tapered Bb Set | 123 Mm Bottom Bracket For Bicycle - om electric cycles at Rs 749.00, Karnal | ID: 2852892356773 Shimano Bb-un101/-k Square Tapered Bb Set | 123 Mm Bottom Bracket For Bicycle - om electric cycles at Rs 749.00, Karnal | ID: 2852892356773](http://5.imimg.com/data5/ECOM/Default/2024/1/379300498/NX/HM/EG/78289478/bbshimanobb-un101-k1.jpg)