[MHadden]

For those of us who are getting, or thinking about getting the GTP, think about this. As far as stock tire size goes...only Goodyear LS2's and Brigdestone Summer only tires are available...I see this being a major problem in the future for those of us who might want a "better" tire than the LS2. Hopefully they'll be better than the LS's on my GF's GASE...Only winter will tell...

 

[Subtle_Cynicism]

I hate worrying about tires. I will say that I am concerned that if I get a GTP, they will not perform well in the snow, and I have to have a car that does decently in snowy weather, Minneapolis is known for it.

 

[MHadden]

I'm hoping the Stabilitrak system will help save some skids, but that system would use a brake induced turn in slippery weather, and is only as good as the tires on the car...

 

[Hambone]

What size tires are they?

 

[MHadden]

The GTP uses 225/50-18's...

Only tires I can find are the OEM tires, the LS2's, and the optional summer tires offered as a package, the Bridgestone Potenza RE050A's...

 

[Blackrider]

Thank god we have about 2 days of snow here a year

 

[MHadden]

Must be nice...except I like snow. It's fun

At least these LS-2's have a 400 TW rating...at least they'll last about 30-40k miles. Still wish they'd make the Triple Assurance's in this size...

 

[otcpharm]

Have you looked into the availability of upsized tires? Like bumping the 225's up to 235 or 245?

Or is it a 7" wheel, which puts the 225's at the upper width limit?

 

[MHadden]

No, I haven't. I'm not good at sizing up larger sizes, and eve then, it's hard to keep the rpms o nthe tires the same as OEM (to keep the speedometer/odomter in check). I guess some research is in order once I find time (15 credit hours and 40 hours a week leaves little time for play).

 

[otcpharm]

245/45-18's would only introduce a 0.7% error in the speedo.

60 indicated would be 59.6 actual.

Nice - in that size there are "all-seasons" from Avon, Continental, Dunlop, Michelin, Pirelli, and Goodyear, speed rated V, W, and Y.

For "summer-only", you can add Bridgestone, BFGoodrich, General, and Yokohama.

 

[02eco]

The ideal size in a 245 would be a 40 series and 235's would be a 45 series.

See this thread, I really like these:

http://www.g6ownersclub.com/forum/showthread.php?t=535

 

[otcpharm]

The ideal size in a 245 would be a 40 series and 235's would be a 45 series.

245/40 is 1.2" shorter than stock, with the speedo reading 4.3% too fast.

235/45 is 0.6" shorter than stock, with the speedo reading 2.0% too fast.

Again, the 245/45 is only 0.2" shorter than stock, with the speedo reading only 0.7% too fast.