I recently changed over to some 10 spoke SS wheels (OEM) and wrapped them with the Kumho Esta MX 275/40-17 tires. Tires are great but man my car is squirrley! It follows lines and ruts in the road and can make you switch lanes if you aren't paying attention. Any ideas?

I recently had the car aligned and it didnt make a difference. I never had this issue with my stock Z-28 16" wheels.

Thanks!

 

wider wheels follow the ruts more

 

Eh, you get used to it after a while. Just a trade off when you get a wider wheel. More grip .

 

Check your air pressure. If it is too high or low the tires will wander. Should be around 30 PSI COLD!

 

hmmm, I have a set of Michelin PS2's (295/30/18 rear and 265/35/18 front) and have them inflated to around 45psi cold and don't have any problems that I notice. Although I don't mind tramlining. I have my toe set at 0.0 degrees, my camber at -1.0 degrees and my caster at 4.8 degrees. I always run my tires COLD around 4-5psi LOWER than the max pressure listed on the tire without any problems. I like a stiff ride as well as precise steering response though.

 

The Pilot PS2's are rated for a higher than usual inflation. Their max psi is 50-51 psi, where a typical street radial is a max of 44 psi . . .

 

275-17 will tramline worse than 245-16.

Overinflated tires will have less grip, and tramline worse. It will handle more crisply, but reducing the grip is a high price to pay. Even for autocross, the highest pressure I ever needed was around 44/30 HOT, and that was straight off the course hot, not cruising hot. Somewhere around 32f/28r cold works well for street driving (MAYBE 34/28 cold if you will be driving recklessly). The MX will also wear quickly if overinflated, especially if you have any negative camber.

The MX also tramlines worse than the GS-D3, but not quite as bad as race tires. It's got a fairly stiff sidewall for a street tire.

 

Great info - Thanks!

I'll play with the air pressure and see if it will help out.

 

Ya mine does it to with those tires.