18x8 Shimy

[Bone]

I just got my wheels in 18x8. When they were first installed they would shimmy from 55 to 80 everywhere else they were smoot as silk. I had them order hubcentric rings which they installed yesterday. Now it shimys from 60 to 75. It feels like a tire is out of round or out of balance. The rims have been checked twice they are true. They have been rebalanced twice. The tire place is startign to F with me about them being performance tires that they wont ride the same. I keep explaining its not a "riding" Issue but they keep saying it is. My factory ones were smooth as silk at those speeds to. So anyone else have this problem with new wheels? Any ideas how to fix this? I hate to make them buy them back because they are exactly what I want in looks but they sux to drive on....

[orion::S14]

Torque the lugs evenly (and in a star pattern) with a GOOD TQ wrench.

Either that, or you have cheap tires...or both.

Otherwise...???????????????

- Brian

[Dream240]

First try driving the car on a new road that's smooth. This will give you an excellent basis for shimmy issues. Because performance tires will reveal EVERY little bump and hole in the road surface.

Also are the wheels "dynamic" or "static" balanced? Dynamic is a balance of BOTH sides of the wheel, static is a balance of only the inside of the wheel, this is only used when you can't mount "stick em" weights on the outside edge of the wheel well.

Dynamic, when done right, will give you the best balance, you might get some high speed (85+) shimmy but not much. Check your wheels for the weights to see what kind of balance they gave you. If it's not right make them do it again and WATCH them do it so you can make sure the wheels are spun to "0" balance. You'd be surprised how many of these guys let a 0.25 difference go, and you WILL feel that on performance tires.

Good luck.

[Bone]

It has sticky weights on the inside of the wheel, I will make them rebalance them yet again since I was unavailable to watch them balance them the first time. Thx

[SirWarrior]

yep. my buddy has a shop and he refused to any work on my wheels, as he knows how anal I am about it. But he did show me what to do and now I can go back and do it myself, without bothering any of his mechanics.
he's happy, and I so am I.