What crank/bb? Help!

[JHJams]

I'm not sure on width's.. really you look at length of the crank arms. 175mm-180mm etc.

 

[expjawa]

The cartridge bottom bracket that you would use comes in a number of different widths, to cover a variety of chain lines in a variety of applications. You might have to experiment a bit to get what you need, because it'll vary depending on the crank arms you use and whether you're running single, double or triple. But a lot of the cranks will specify what chain line they'll have with a giving BB size.