I run M/T's & use to have a bad vibration in the driveline. Was told it was my driveshaft so I had it balanced, but it was fine. So I took my slicks to the Truck shop & they balanced them. One side had a huge amount of lead stuck on it & the other had very little. Both slicks have the same run out but were so different. After balancing the car was totally different & ran so smooth so I always get my slicks balanced. Another racer I know had bad tire shake after the launch & he got his balanced too, even tho other racers said it was a waste of time, but he said it improved his launch & was getting better 330' times. Each to their own but I'm a firm believer of balancing. .