Steering Shaking Badly

[RussCan]

I just bought a new set of DCR 19" 3 piece forged rims. I had Goodyear F1-GS-D3 tires mounted and balanced and installed. I drove the car off the lot and it starts shaking around 40 MPH and never stops. There is no sweet spot speed. I take it back and the tech says he will re-road force them again. After doing them again he said that the front driver side rim was high on Lateral Rim Run out. He said the inside was 0013 and the outside was 0035. The Radial Run out was 20 inside and 41 outside. The Passenger side front was also not that great. Lateral Inside was 0010 and the outside was 22. The Radial Runout inside was 0015 and 0030 outside. Does anyone know what tolerance of Lateral and Radial Run out is acceptable on quality 3pcs forged wheels. Right now I'm trying to get the rim issue resolved, then I will worry about the tires.

Thank You, Russ

[nick49]

Your not being consistant with your numbers and you don't state if you're talking in thousanths, tenths, inch, metric or what. 0013 if you mean 13 ten thousanths of an inch is perfectly accetable for a machined wheel. But what is 20,41 and 22?

Regardless of measurements, you could have a non-concentric forging that cannot be corrected with balance weights. I'd get a refund or go with a better quality wheel if this can't be corrected. Also compare weights to known quality wheels, weight is everything.

[1999C4CO]

Just as a question are you using Hub Centering Rings on your rim install. When i put the 19in wheels on my 996 i was having a similar issue b/c the wheel manu forgot to include the rings (small plastic pieces that go on the hub to center the weeel) with the shipment. Two days later they arrived, i put them on and bingo the issue was resolved. I would assume if you and your wheel shop went to the trouble of measuring run out it was thought of but who knows.....

Andrew

[RussCan]

I had the wheels custom made for the car. I don't think they require Rings. The Hunter Machine does not require rings to measure the rims and that is were the measurments are from. In regards to the Numbers there all thousands of an inch. So again, are some of these higher than tolerance on 3 piece rims should be? Also in regards to the weighs of the wheels the fronts are 24lbs for 19' inch and the rears are 27.

Thanks, Russ