Main Axle Nut
The main axle nut uses a Shimano BB tool interface, the one that’s been around for ages, the one that is in your toolbox. If you own a Madonna V1 with the 44 mm hexagon nut, you can retrofit this one. Sorry we didn’t use this tool interface from the start.
- Shimano BB tool interface, TL-FC33 or TL-FC32
- Fits the Madonna and Jibb