Impossible to balance wheel ... two shops already failed ..., New tyres didn't help ... Options

[johannes]

I bought a set of Mahle with tyres.
I brought them to a shop to have them balanced.
When I put them on the car it started to vibrate at 90 to 120 kmh (55 to 75 Mph)
Brought it back to the shop, redid the balance, didn't help. They say, the tyres may be warped. I bought them a new set of tyres, let it balance ... didn't help.
They sent me to another shop that has a better machine. They put (a lot of)weigths inside and outside the rim (ugly), but it didn't helped.
The problem occured when I bought these rims I figure they may be bent ...
Could this old and wise guy be right ?
http://www.youtube.com/watch?v=PeclYZQCyso

Any advices ...

[Katmanken]

First, I'd loosen the lug bolts and properly retorque the wheels onto the car with the cross torque sequence. Shops use high power air tools and when they don't use the cross torque sequence, can bend the wheel. Sometimes loosening and retightening the lug bolts solves the problem

You need to measure the rims to see if they are bent.

You can do this on the car by jacking up one wheel so it doesn't touch the ground and spinning the wheel while measuring the rim movement.

Two possible rim movements. If it's bent from a side hit, face the wheel like you want to remove the lug bolts. Place a dial indicator at the edge of the rim so that the probe of the indicator is parallel to the axle and touching the edge of the rim next to the tire. Spin the wheel. If the rim is bent, the probe of the indicator will move in and out along the axis parallel to the axle.

The other bend to a rim comes from a front impact such as a curb or pothole. In that case, the rim is no longer round and a dial indicator can also tell.

Sometimes you get both.

If the rims are OK, it's probably the tires.

[Drums66]

First, I'd loosen the lug bolts and properly retorque the wheels onto the car with the cross torque sequence. it's probably the tires.

I think this is your problem (IMG:style_emoticons/default/idea.gif)
this has happened to me before! (IMG:style_emoticons/default/shades.gif)

[johannes]

First, I'd loosen the lug bolts and properly retorque the wheels onto the car with the cross torque sequence. it's probably the tires.

I think this is your problem (IMG:style_emoticons/default/idea.gif)
this has happened to me before! (IMG:style_emoticons/default/shades.gif)

I'll try that as soon as my finger will be OK again

Are the front wheel bearings properly adjusted so there is no slop?

Yes, it has be done, and the front suspension is in good shape. You can't move the weel with your hands. Everything is tight

johannes, there are two shops in my area that have a tool that they roll up to the car and they can spin the tire and balance it. I think its called strobe balancing.

I haven't seen that before. I'll ask around. Thank you for the advice.

what comic?

This one ... http://HMSbd.com you can watch the trailer on the top of the webpage