Weirdest high speed vibration issue

[zizouomar]

Hey there

So I recently got my 4 OEM wheels straightened, bought 4 new high perf tyres, balanced and aligned. As soon as I got out of the shop, it was amazing, smooth, no vibration, nothing.

But now, every first ride of the day on the highway, I have a vibration like a totally unbalanced wheel. Then, if I get out of the highway and do some city driving for a few min, then go back on the highway, no more vibration.

Never had such issue in 15 years of driving different cars, VW and Audis.

What could cause this ?

Thanks

[Audibot]

What kind of tires? Do you have them properly inflated? It almost sounds like a flat spot but that is something that takes a while to develop.

On my C7, when an engine mount goes, I get a vibration that feels like an unbalanced wheel.

[DanielHamilton]

Yeah this sounds like an engine/transmission issue more than wheels. What transmission?

[zizouomar]

Well, it ended up being Costco and their shitty balancing skills.
Seems like I lost a weight and it made the big difference.

Rebalanced at a proper shop and all smooth now.

[Audibot]

Well, it ended up being Costco and their shitty balancing skills.
Seems like I lost a weight and it made the big difference.

Rebalanced at a proper shop and all smooth now.

Ah yeah, Costco is great for some things but they will not road force balance either.

[zizouomar]

Ah yeah, Costco is great for some things but they will not road force balance either.

It was my first time using Costco for my tires/wheels. I was far from home and my only option was that.

Learned from my mistake.

[dalmation53]

What kind of tires? Do you have them properly inflated? It almost sounds like a flat spot but that is something that takes a while to develop.

On my C7, when an engine mount goes, I get a vibration that feels like an unbalanced wheel.

Facts becauae the engine is so damn heavy its all over the place lol,happend to me to

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