Both front and back are same size. Front has bearing, and back is keyed
---------- Post added at 07:50 PM ---------- Previous post was at 07:43 PM ----------
The axle I have is keyed all the way, and I noticed it's running out, so I took everything out and going to straighten. Also the bearing's are shot, so we'll do everything, and move the motor to center as well. Just made a career out of it.