Cranks replacement
- Find suitable interface: square, Octalink, ISIS Drive,
Hollowtech II etc
- square can be diamond or square

- square can be diamond or square
- If you have your current Crankset:
- compare the leg length
- compare sitting depth
- Check the gears aren’t bent
- Check the sitting 47.5mm to 50mm to the middle gear is appropriate spacing between the axis of the bike tube and middle gear