Problems Balancing wheels
 

Hi - has anyone had problems balancing front wheels. I've 18 inch wheels on my 2.5 Boxter and have had them balanced several times and they still wobble. Any suggestions on how to put problem right or what the problem might be. The pressure I am running is 29 psi front and 36 psi back? Cheers

Hi, I had problems getting my 18 inch wheels balanced.
First thing was I got the suspension properly aligned, then I took the wheels to a specialist balancing shop that used a special spindle on a machine that that simulates a real suspension more accurately. Not too expensive and it's all good now.

Are they OEM wheels? Are you running wheel spacers?? Try torquing the front wheels on while the front is off the ground. The wheels might not be sitting on the hub properly & also check the wheels and make sure they arent bent

Boxster. Just sayin' ;).

You sure you don't have a bent rim? Should be obvious on a spin balancing machine.

I had the same problem. Dealer tried several times to balance & align. Problem was OLD tires, even though there were lots of meat on them and looked good. Check the date code on your tires. I had vibration at 70+ mph.

I had the same problem. I put on brand new tires and watched them dynamic balance them. The rims were perfectly straight and I still had some wobble, particularly on cold tires. It got better when the tires warmed up. This makes me think a lot of high performance tires have some Nylon cords in them. Also I put a 60 lb. bag of sand in the front boot and believe it or not that helped a LOT. Unconventional I know but it also seems to ride and handle better with the weight.

Every DOT approved tire I have ever looked at lists material & number of belts & plies in tread & sidewalls. Early speed rated Hi- perf radial tires like the Pirelli P7 use a nylon "cap" belt to minimize tire deformation at high speeds. Nylon shrinks when heated & flat spots easily while cold. Michelin Pilot Super Sports don't have nylon belts. One of the many pluses of using premium tires. Weight is a great dampener & Porsches are very sensitive to imbalances. I often notice a ride quality difference between a full tank & low tank.

If they are new tires, take them to a place that has road force balancing, and some one that knows how to use it. It often means dismounting the tires and remounting before balancing again. I battled it for months and 3 sets of tires is how I know. Mine now runs very smooth at all speeds.