Light vibrations in the Kia Stinger above 70 mph

[Katakuri2003]

I recently bought a used 2020 Kia Stinger GT1 and took it to the dealer after noticing vibrations were detected beyond 60 mph. Three bent rims were the culprit, and a wheel repair business quickly fixed them (under their dime). Following rim repairs, rebalancing, and alignment, the vibration now begins beyond 70 mph. Other than the problem that was already resolved, I don't know what might trigger this. Furthermore, when moving forward at such speed as opposed to releasing the gas, it seems as though vibrations are more obvious. But that might just be in my head. Are there any suggestions for me or am I being overly sensitive?

 

[Kazz]

I believe you still have a wheel balance problem. Dealerships often align for a common speed of 55 or 65, etc. They don't always have the best equipment, either.

I would start by telling them at what speed the vibration begins and ask them to balance your wheels for that speed. They may say that balancing at that speed may give you vibration at a lower or some other speed. Personally, I ignore that input and have my wheels balanced at my preferred top speeds (79mph in a 70mph zone, for instance).

Worst case, get to a dedicated tire and wheel shop and explain your problem. You will have to pay, but balancing is cheap and you should only need the front two balanced. Plus, their techs can tell you what they think of the wheel repairs, etc.

Good luck!

 

[D.J.]

Maybe a road force balance could help you

 

[MerlintheMad]

Personally, I ignore that input and have my wheels balanced at my preferred top speeds (79mph in a 70mph zone, for instance).

Lol, my "preferred top speeds" are very extra legal, so, this approach will not suit.

OP: on my last road trip I did some fast passing a number of times, and I too noticed a faint vibration that I'm pretty sure wasn't there before. Could be a thrown balancing weight(s), could be a slightly damaged wheel (although I've only hit something ONCE, that was sticking up, and was loud enough to make me imagine a totally destroyed wheel: but when I stopped and looked it over, the most I could see was a little scrape on the rim less than two inches long: but the "BAM!" was so scary-loud: nevertheless, I think it's possible that the wheel is ever so slightly out of true now).

My experience was similar to yours: above 70-80 MPH the vibration would begin: but I never felt this through the steering wheel, only generally through my feet. I admit to being very sensitive to this, on the lookout for it: because I want to know that I could potentially take my Stinger all the way up to over 150 MPH and still have it rock solid smooth. If the vibration did not increase beyond c. 115 MPH, then I can live with it as-is. Naturally, the faster I went the more rapid the vibration became, although the level of vibration did not seem to build, if that makes any sense.

 

[Kazz]

Lol, my "preferred top speeds" are very extra legal, so, this approach will not suit.

I believe my point is obvious. Have the shop balance your wheels at a higher rotational speed.

 

[D.J.]

I believe my point is obvious. Have the shop balance your wheels at a higher rotational speed.

Is that a thing shops can do?

Every dynamic balancer I have ever seen, even the road force balancers, use one preset default rotation speed.

Are dynabeads a thing in the automotive community

Tire Balancing

 

[Kazz]

Well, I'm an old fart. And maybe today's equipment doesn't. But I've had it done in the past when I've run into these kinds of issues. They either laugh behind my back and just rebalance them better or they actually can balance at a higher rotational speed. LOL

It really only crops up when you have wheels with issues or poor quality tires. Those kinds of tire issues may not be as common as they once were, either.

 

[7Andrei7]

From my personal experience there can be a million issues causing the Stinger to vibrate at high speeds or under braking and this is mainly because the steering is extra sensitive.

First make sure it vibrates on all roads. There might be slight imperfections in the highway surface that causes slight steering vibration. The steering doesn't really filter out a lot of roughness. My Stinger is super smooth cruising at 87mph on most roads and then you suddenly reach a rougher part of the highway and the steering wheel vibrates as if the wheels are unbalanced. It can be a new part of highway where they used a rougher type of asphalt.

If it vibrates on all roads, make sure they did proper wheel balancing at the dealer. I've had this happen many times. Second or third try was usually successful.

If that does not work, check that there are no faults with the tires. If the wheels were bent the tires could have some very slight uneven wear and cause vibrations. They will even out in time. Or if the tires are new one of them could be bad.

 

[stoopid]

Maybe a road force balance could help you

+1, road force balancing has fixed vibration issues for me at higher speeds in the past.