Incendier

I would respectfully disagree with this assessment. Porsche themselves dynamically balance their wheels using adhesive weights on the inside of the wheels. Everything that comes off the truck, from a Boxster to the Carerra GT, is balanced this way, so it is clearly appropriate for a high-speed wheel.

Anyone who lacks the equipment to do a correct dynamic balance on a wheel with it off the car, using adhesive weights, shouldn't be seeing your car in the first place, and a decent technician should be able to isolate a suspension or driveline issue from a tire issue in short order.

The Hunter road-force equipped machines are Porsche-approved (actually, required), and I've been using them for years at the dealership to resolve all manner of vibration issues. Our machine will dynamic balance a wheel using adhesive weights, measure rim out-of-round and runout to the millimeter, and measure the road force of the tire/wheel combination in one shot.

Plus, many Porsche rims lack the correct lip for either the pound-on or bracket-and-weight forms of external weights.

tailpipe

Incendier

Respectfully you are not dissagreeing with me we both agree on wheels being dynamically ballanced if Porsche can do it without putting weights on the front of the wheel i'm all for it, the key is they need to be dynamically ballanced. I'm also sure that Porsche discards alot of tires and rims that are beyond thier specifications most tire shops wont do that, you are also right in vendors using the right equipment and processes it is up to all owners to research and choose thier best options and I think rennlist is one of the best places for that.

thanks for your opinion

paul

dr bob

On several cars with AL rims, I've spent a few minutes with the balance tech at the local tires store, sharing the settings I want them to use on the machine when they balance. The machines they use allow the tech to input wheel diameter and offset numbers so the machine can calculate correctly the weights and locations needed. The basic idea is that the machine expects the tech to use hammer-on weights at the lip of the rim. The corrected wheel size info fools the calculations to allow for stick-on weights behind the spokes. So tell the machine the wheel is an inch larger in diameter, and it's narrower and with less negative offset to allow for weights behind the face/spokes in front, and in from the lip in the rear of the wheel. This is tape-measure math, really.

Incendier

^ what he said.

Although all balancers function somewhat differently, every one that I've used (of a modern vintage) allows for compensation for the individual differences in rim construction.

'course, we could just throw 'em on the 'ol bubble balancer and call it good.