Right now width in the front is different than width in the rear. I didn't set it up that way intentionally, just using what I have on hand. The front is 1.5" and I normally give it 50 pounds. The rear is 1.75" and I normally give it 40 pounds. The rear is a Travel Contact, the front is a City Contact (not as good for dirt, but "OK" unless it's very muddy).