I started a new Fatbike conversion project. The rear triangle widening is easy thing and done before. But now I have a problem with the bottom bracket. I thought that 73 mm bottom bracket will do fine. But when I installed (a Chinese) fatbike crankset, I noticed that the spindle is not machined for the bearings for the whole length. The spindle is a bit thinner in the middle and now with this narrow bottom bracket it makes slack in the crankset. I also tested RaceFace spindle and there is the same problem. Does anybody know, if there is some kind of widening set for pressfit 41 mm shell available? I found some for 46mm shell. If not, then I guess the only solution is to machine a custom part on a lathe.
by ActiveLifeinFinland