01-01-12, 11:58 PM
Hi Simon, first of all you need to be certain there is no notchiness in the steering head races (which could have been caused by a bump, or running them adjusted too tight. Secondly, as on a push bike, the wheels need to be in line or it will pull to one side. You need a hand to carefully run a string round them, as the marks on the swing arm may not be accurate. (I take more notice of my piece of string!) Hope it's nothing more serious like a bent frame, good luck with it.