I got a new set of wheels put on today (Lexion 105's) with Conti Sport 3's in 255/30/19 on my S4. The car drives fine until 65 MPH and it shakes pretty bad. I feel nothing at all below this and it is not until 65 that I feel it. I haven't gone above 70 MPH with these wheels yet. It is not my alignment since with my old wheels it didn't do this.

I am pretty sure it is not a bend since I see no bends and feel nothing at all until 65 MPH.

Should I take the wheels and get them re-balanced? Any other ideas on what could cause it to shake other than wheel out of balance?

 

Maybe the wheels take centering rings that the vendor did not install, or were not in the boxes they came in.

 

I would get them balanced. I bought some wheels with tires mounted from Tirerack a couple of years ago, and got a bad vibration around 70mph. Dropped it off at a local tire shop and had the wheels balanced and it went away.

 

I would suggest getting an alignment and balanced. One worst case is the wheels cannot be balanced at all. Common cases on cheap wheels.

 

it's balancing. when a car vibrates at a certain speed only, it's balance issue.

dont waste your time doing an alignment unless your wheel is off or if you notice uneven wear (rear center wearing out faster is normal for 911).

 

It is possible that you have a wheel concentricity or "runout" problem.
A good tire shop can check just the wheels for runout. If the runout exceeds about .025-.030 in., either radially or laterally, it can cause harmonic vibration at highway speed.
If this is the problem, you can balance the wheels till the cows come home and it won't eliminate the vibration.

 

No need for alignment.

First, make sure the wheel center bore is correct for your car fitment. A lot of wheels that are not made specific for a car brand such as Oettinger or ABT for Audi, will require a center ring to make it hubcentric.

If it is hubcentric, then you need a rebalance. You may want to have them break apart the tire and wheel and remount them using a road force balancer machine like a lot of hunter machines have.

If that doesn't fix it, you may need new control arms or thrust arms but that shouldn't make your car shake that much.

 

I just went through this same thing this week. I would get them balanced it will make a huge difference as it only takes a little imbalance to shake. Worked great for me
Ricardo
997s

 

I got it figured out. There was water inside the wheel from when the tire got mounted.

 

Hmm...I would have guess balancing as well since I experienced this earlier as well...

Not sure why water would do it...what happens if you drive through a puddle or water gets into the wheels somehow?

 

Actually that is known to happen with certain makes of aftermarket wheels (I won't mention any names). When it rains water collects in a "valley" on the inner part of the wheel and that can temporarily throw off the alignment.