Corvette Z06 Forum banner

1 - 8 of 8 Posts

·
Registered
Joined
·
808 Posts
Discussion Starter · #1 · (Edited)
The short story - Feeling a vibration through your steering wheel? Have your tires balanced.




Here's the long story -

Ever since I had my Toyo Proxes RA1s mounted I noticed a weird vibration through my steering wheel while driving, especially at higher speeds. I would characterize the vibration as a similar sensation to that of driving over rumble strips.

At first I thought the vibration was due to getting greater road feedback through the tires. (The roads around here are poor to bad in many areas.) Anyway, I just put it in the back of mind and continued driving.

However, today I took advantage of the clear cool weather and took an extended trip (Omaha to Lincoln) and decided that it wasn't just the bad roads after all, I clearly had a problem.

I dropped in to a Walker Tire in Lincoln because I saw a beautiful Viper GTS out front. Turns out it's the owner's (Nick Vuko), a great guy, who treated me to a tour of the store and his home and collection of cars. He remarked that my wheels were not correctly balanced when I had the Toyos mounted and suggested that I have them re-balanced. Anyway, I had the wheels re-torqued there and after hanging out with Nick and the Viper I set sail for home. On my return trip I noticed that the vibe was still there despite the re-torque.

I dropped in to a tire/wheel specialist who specifically worked on Vettes and was told something very interesting that I never knew before. He pointed out that according to GM engineers the stock wheels must have outside wheel lip weights to get optimal balance. He went on to say that the tape on weights although more attractive need to be placed as far outward (from the hub) if they are to be used at all and even then one could only expect about 95% true balance.

So I had my wheels re-balanced (turns out they were in fact out of balance - more precisely "static" balanced) and away I went. Wow, what a difference! The vibration is gone and I actually found that some of the roads aren't nearly as bad as I previously thought.


Arthur :z:
 

·
Registered
Joined
·
17,744 Posts
Good info thanks :z:
 

·
Registered
Joined
·
296 Posts
I have the stock Z06 polished wheels, and had them balanced on a Hunter GSP9700 tire balancer. The guy that balanced them has been mounting and balancing wheels for over 15 years. He told me that the tire also needs to be balanced to the rim. To get a good balance, you sometimes need to rotate the tire 180 degrees on the rim. He used the stick on weights on the wheels, and the knock on rim weights on the inside.

My wheels are perfectly balanced using this method.

I would say experience plays a key role in good tire balancing.

augydog :cheers:
 

·
Registered
Joined
·
844 Posts
I watched my wheels being balanced after I had the Toyo T-1's installed 2 weeks ago. My local Firestone Dealer (who has fixed a flat for me before and done a rebalance) uses a dynamic balancing machine. One of my new tires only needed a weight on the inside rim-and both tires requirerd very little "weights" at all. So far the car feels great but will have it on I-95 this week and will pay close attention for any vibration(s). Thanks for the info. :zboobie:
 

·
Registered
Joined
·
882 Posts
Most depends on the technician and his skill. :flaming:

I have the inside stick-on weights (close to the outer rim) as well as the inside rim weights. The dealer I used does this all the time and has no issues. The ride is smooth. :D

On other cars where look is not critical, I have had both outer and inner rim weights. More than once, there was vibration on new tires. Re-balancing the new tires once again, cured that issue. My guess is just sloppy work. :bang:

Other tires, at about 1/2 their life develop vibration. The tire wear looks normal and the tires rebalance identically. With older tires, I have always wondered if breaking the bead and repositioning the tire would help? Only after replacement, does the vibration go away. The techs give many explanations, most of it pseudo science. The dealer gives a warranty and pro-rates generously so the damage is minimal. :)
 

·
Registered
Joined
·
1,575 Posts
I just had new tires mounted and they installed the weights on the inside outer rim. I thought this was great. No more weights on the outside. The car runs smooth. Could this be a problem however? :-?
 

·
Registered
Joined
·
722 Posts
augydog said:
I have the stock Z06 polished wheels, and had them balanced on a Hunter GSP9700 tire balancer. The guy that balanced them has been mounting and balancing wheels for over 15 years. He told me that the tire also needs to be balanced to the rim. To get a good balance, you sometimes need to rotate the tire 180 degrees on the rim. He used the stick on weights on the wheels, and the knock on rim weights on the inside.

My wheels are perfectly balanced using this method.

I would say experience plays a key role in good tire balancing.

augydog :cheers:
I wouldn't even bother with a shop without a GSP9700. The machine can also measure the degree of radial force variation each tire has and determine if the tire's going to be impossible to balance, which hasn't seemed to be a problem on our Zs. :cheers:
 

·
Registered
Joined
·
2,388 Posts
roushraven said:
I dropped in to a tire/wheel specialist who specifically worked on Vettes and was told something very interesting that I never knew before. He pointed out that according to GM engineers the stock wheels must have outside wheel lip weights to get optimal balance. He went on to say that the tape on weights although more attractive need to be placed as far outward (from the hub) if they are to be used at all and even then one could only expect about 95% true balance.
I have had my stock wheels/tires balanced with the tape-on weights placed inside the wheel. No problems ... smooth all the way up to hyper speed.

I think it depends on the machine used (go dynamic for better balance), the operator and where they place the tape-on weights. They should be as far out from the center of the wheel as possible.

The clip-on weights on the outside of the rim lip look like crap ... plus they can shift from tire flex (their clip is pinched between the rim and tire) and chew up the paint, seen it happen before.
 
1 - 8 of 8 Posts
Top