I have been fortunate to have gotten 34K miles out of my factory provided Michelin Pilots on 04' 6MT (backs were slick, fronts had another 4K).

But, the Michelins are too expensive for my budget... so I went with the new Goodyear Eagle GTs. They have a good looking tread design and are quiet (at least in the first 1K miles :-).

The Goodyear dealer installed/balanced and aligned the car.

The problem is that I have extreme vibration at 65 mph now... I took it back and they re-balanced, so now it's not extreme until 70 mph. In the past I could go from 70 - 90 without knowing it, now I can not get over 80 due to vibrations.

Any suggestions... I am having the tires swapped out for another set (front/back) but the dealer says that the tires are not defective... so I am looking for experienced advice from fellow G35 drivers.

 

Just had these tires put on my 07 G35S Sedan - As in about 2 hours ago.
I haven't got them up to speed yet, but I will do so tomorrow (I usually drive about 70-80 on my commute). I'll be on the lookout for any odd vibrations and report back tomorrow.

 

I can feel a vibration that I didn't notice before at highway speeds, but it isn't bad.

I also haven't had my car aligned yet - The shop I bought my tires from doesn't do alignments.

I'm going to drive on them a little longer before I decide if I like them or not, but I haven't noticed a vibration as bad as the one that you describe.

 

Anyone have Road Force Balancing experinces that they could share?

 

keep taking them back until they dont vibrate anymore, you paid to have them balanced, make them do it right

 

If their balancer may out of calibration, taking it to the same place will yeild same results.

As for Road Force Balancing is what I have always used, it balances the tire while puting a "load" on it (friction pulley). It will balance the tire in two axis.

 

I think that the GTs are going back.

Today I noticed the vibration - 72-80 mph.
The doors literally started rattling.

I'm going to see what my other choices are...