Grand Sport Gen 2 tire chatter

**jefflohss00** · 02-17-11, 08:45 PM

My new 2011GS has the new generation 2 tires because it has selective ride control. When turning at slow speeds there is alot of tire chatter/slipping of the fronts. I understand that this is normal because of the tire width but am wondering if I made a poor choice and if the Gen 1 tires would have been better? I have been told that they are superior track tires but they have less tread depth and will not last as long as G1's. Opinions please.

**SGF** · 02-19-11, 07:33 PM

Would be interested in replies too, since just ordered new 2011 GS Conv today.

**Johnduck** · 04-13-11, 08:38 AM

I have a 2010 GS with the gen I tires and they are bad also, the colder it is the worse it is.

**Tuna** · 04-13-11, 09:20 AM

Seems pretty normal for really wide front tires with a lot of grip. Even my CTS V does this.

**BigJimZ16** · 04-13-11, 11:23 AM

My '10 Grand Sport Vert does the same thing. I'm almost immune to it now...

**Pourboire** · 06-15-11, 12:23 PM

Guys not sure about tire nomenclature, but my 2011 grand sport convertible has not exhibited anything mentioned. The car came
with Goodyear Eagle F1 tires. I monitor my g forces on the HUD when cornering and I have pushed it near 9 in some corners

**catbert** · 06-15-11, 12:49 PM

Anything is better than Gen 1s.

**Tuna** · 06-15-11, 03:24 PM

Originally Posted by catbert

Anything is better than Gen 1s.

The SuperCar G2's should be better in the rain and pretty much the same when dry.

**catbert** · 06-16-11, 03:46 PM

Originally Posted by Tuna

The SuperCar G2's should be better in the rain and pretty much the same when dry.

The tread looks wet friendly, but it's a Summer rated tire, so stay out of the cold and slush.

**Hib Halverson** · 06-16-11, 04:46 PM

Originally Posted by Pourboire

Guys not sure about tire nomenclature, but my 2011 grand sport convertible has not exhibited anything mentioned. The car came
with Goodyear Eagle F1 tires. I monitor my g forces on the HUD when cornering and I have pushed it near 9 in some corners

"...near 9..."

If you were cornering at lateral acceleration of 9g, you'd also be dead because of your snapped spine.

I suspect, you meant "...near 0.9g."

But...I digress.

The OP was talking about tight turns at slow speeds not high-speed turns near the car's handling limit.

Wide, ultra-performance radials when turning sharp at slow speeds may "chatter" a bit. The severity depends on the surface, but some chatter is to be expected.

Also, if we're going to discuss...or complain, as the case might be...about Goodyear EMT tires, let's at least get our nomenclature straight.

The first generation run flat, the Eagle F1 GS-C EMT, was offered from 94-96.
The second generation RFT, the Eagle F1 GS EMT, was offered from 97-04.
The third generation Eagle F1 GS-2 EMT and the Eagle F1 Supercar EMT were introduced in 2005 and continue today.

**Pourboire** · 06-20-11, 08:58 AM

Correct meant .9 G's, spent to many years flying jets and haven't gotten use to using decimal. I believe my driving experience in Arizona is completely different then most of the other states with hits moderate and hot climate.