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I am experiencing quite a bit of wheel shimmy after my tire shop installed my Y2k wcc wheels...Gets pretty bad past 70mph. My shop said they were all perfectly balanced and that the wheels were hopping around a lot on the balancer! Anyone else experience this or have a cure?
The tire shop should be able to tell you, if the wheels are out of round. You might have to send them back, they should not hop around on the balancer.
I've had the same situation with stock 18" wheels on a previous 97 VR4. The outter circumference (round) had been damaged causing the wheel hop. The balancing machine detected nothing. But, if you put a dial indicator on the outside circumference, and slowly turn the wheel while it is on the balancing machine, you can measure changes in the outside radius which is called runout.
they are made on a CNC machine and are extremely accurate.....
Yes, the CNC machine can do extremely close tollerance work. But all it takes is one small metal chip on the clamping fixture, and you have runout. This happens regularly with disc brake rotors.
I am experiencing quite a bit of wheel shimmy after my tire shop installed my Y2k wcc wheels...Gets pretty bad past 70mph. My shop said they were all perfectly balanced and that the wheels were hopping around a lot on the balancer! Anyone else experience this or have a cure?
I had a similar situation with my stock wheels. It turns out that one of them had been damaged somehow on the road and was out of round. This condition can be detected if the tire shop uses a Hunter 9700 balancer. Go somewhere that has one (usually Discount Tires or American Tires have them) and let them try to balance the wheels.