I believe some of his points make sense, but the outside temperature will play a role here too. Here in Denver, during Spring the temperature during the day can reach 85 and can drop to 35 at night. I live in New York and I know you may have some drastic temperatures changes too. Therefore it will be impossible to really draw a conclusion from this experiment. My suggestion: take the car to the stealer and take care of the alignment/balancing.

When the dealer does an alignment on a BMW, don't they use sand bags to weigh the car down? I don't think any regular shop has the bags. I also think the alignment specs are different for the 20" wheels.

Any shop with a road force machine should be able to balance your wheels. For the alignment, I would stick with a BMW dealer...

Craig

Agree with Craig..

Have the wheel balance done using a Hunter Roadforce wheel balancing machine. It makes a big difference, especially so on big wheels. You can find a place in your area that has this machine using the Hunter site (brings up car dealers too):
Hunter GSP9700 Wheel Vibration Control System

Have the alignment done at the dealer. It doesn't cost much more (if anything) than at a generic place.

So I took it to a Goodyear shop that was listed as having a Hunter machine... which charged $30/tire (which is avg by calling around). First did the 2 rears - since the vibration is in the seats, visible shaking too)... and the vibration was still there, a little worse perhaps. Then I had them do the 2 fronts and while it's better, it is still pretty consistent when accelerating through 60mph and upward. It is also there when letting off the gas (no brake) from 80->60mph.

The shop just calibrated their machine yesterday so it's supposed to be really accurate. He put weights in different places (some needed more than others, said it was really off before)... and all 4 tires are now spinning perfectly round, the rims are not out-of-round and the tires look good.

Ideas? I can bring it to the dealer and state the same problem, state they were road-forced, but they will probably ask me to pay their fee to do it again at a much higher price (and still may not fix the problem). I already did a wheel alignment through them. Suspension isn't likely to cause this right?

*UPDATE* I spoke with the company that sells the rims (wheelsandcaps) - they say the vehicle won't even accept hub centric rings and their wheels don't require them. We had a good 5-10 min conversation and he was pretty knowledgeable so it wasn't like he was trying to squirm out of responsibility. He couldn't do anything for me after a year of use anyway. He thinks the guys never actually did the road-force, which usually accounts for up to 120mph. All I saw was a spinning wheel and unsure if anything was pressed against it from my angle. He thinks it's the actual Toyo tires that are bad because when a store gets a new rim they are supposed to spin the rim... 2 places have confirmed the rims are not out-of-round.

If you're getting vibration on acceleration/deceleration that's worn cv joints.

Hmm, the car has 6k mi., less when this started. Would that cause a creaking noise going up/down driveways (front and back wheels) like I've been experiencing too? It's weird how the vibration started immediately after I got the new wheels/tires on last year though. Could they have been damaged during the install - are they even close to each other?

I wouldn't think wheels would damage the joints. Have you taken it to the dealer? If it's under warranty let them diagnose the problem.

I've found that using the hub centric (the center of the wheel) to balance the wheel isn't very accurate (hunter or not) especially larger rims. I tried to balance an previous set (22") on a previous vehicle and the only way they were done correctly was by using a balancer that mounts to the wheel lugs (the way it fastens to the car).

Just wanted to update that my vibration is gone after replacing:
1) left rear warped rim - still had some vibration after, but it was definitely less
2) right rear toyo proxes ST tire

They gave me remaining-life credit (8/32 & 9/32) on all 4 so I got a new set of Proxes ST II for $250 plus taxes/mount/balance. Couldn't just replace the one since the STs are discontinued in the 315/35/20.

Right away I noticed the steering is lighter. Just glad the problem is gone and I can drive at highway speeds with a smile again. If anyone's interested, I can do a Proxes STII long-term review at some point. All dealers were really negative about the STs in comparison.

BTW, nobody go to AutoTrend in Lindenhurst, NY (also on ebay as 1015f). They sold me the out of round Toyo tire, I brought it back to them twice and they wouldn't admit to the problem. It was an easy warranty claim from Toyo but they chose not to do it. STS Tire immediately saw the hop when being spun on the balancer and did the claim for me. I've spent $500 more than I had to over these months to resolve this whole thing all because they were not honest with me about balance results from the beginning.

Another tip about balancing, ask what speed the balancer spins the wheels up to, because it makes a difference. You do not need road-force balancing to get it right. When I had that done it only went up to 25mph and the vibe was still there at 65. That was a waste of $135.