I usually run 315/60 M/T Drag Radials but I went to T&T at a marginal hooking track. I have a set of old 29.5/10.5W slicks on a 14 in. rim and I put them on my D50 to try. It hooked every pass but It would pull the front wheels about 3 ft. off the ground and head straight to the right every time.Most of the time I had to let completely off the throttle. It has never done that with the Drag Radials. I was wondering if one of the tires is bigger around than the other one or what do you think what the problem could be. What is the best way to measure the circumference?