Discussion Starter · #1 ·
My father has a '21 Hellcat NB and I bought him a set of Forgestar D5 17X10 wheels and M/T ET Street R's for the back. Friday night we took his cat to Cecil County Dragway for some grudge racing and since he hasn't raced in almost 40 years he decided to use the black key for his first few runs. On his first run he noticed some vibration coming from the rear about 3/4 of the way down the track all the way until he slowed the car way down. He did 4 more runs and ever run the vibration seemed to get worse to the point where he decided to call it quits for the night. On the 30 minute ride home we could feel a vibration coming from the back the whole time we were over 55mph. Our first thought was maybe a weight came off and a tire was unbalanced so when we got home we took the wheels off and all of the weights were still on. Next we put the factory wheels back on and took it for a drive to see if maybe something was wrong with the driveshaft or rear drivetrain, but the car drove nice and smooth. So now we are thinking that maybe the tire spun on the wheel and that is why he got a vibration because the wheels are out of balance. I wouldn't think the tire would slip on the wheel in 500hp mode, but we are going to take it back to the tire place on Monday and have them check to se if they are unbalanced. The Forgestar wheels have the Bead Knurling to keep the tires from slipping on the wheels so I don't know how they could have slipped. I wasn't there when the tire place mounted and balanced the wheels and tires, but maybe they put some of the lube on to help mount the tire. When we take the wheels and tires back could they clean off the lube and mount the tires dry to keep the tires from spinning? Is there any other way to keep the tires form slipping on the wheels because I really don't feel like buying him another set of wheels?