275/35-19 on Front Stock Sport Rays for track use?

clee078 · 04-08-2019, 08:08 PM

From what I've read, the fitment shouldn't be an issue to run the standard rear tire size on the stock front wheels. My suspension is fully stock.

What I'm wondering is if this is safe for track days (9" rim width is the narrowest acceptable rim width for 275s). My thought is running a square 275 will dial out a bit of the understeer, and maybe help a touch with the sidewall rollover I'm getting on 245s. But, primarily looking for balance and more grip.

Currently running Michelin PS4S. Would consider going to a bit more extreme like RE71R at the next change.

SS_Firehawk · 04-08-2019, 08:40 PM

275 is fine on the fronts. Lots of guys run a 275 square with Rays Sports on track.

Try a set of Kuhmo V720's and keep pressure between 32 and 34 psi. Some guys had issues with delamination, but they wore perfectly all day at Sebring. They're hundreds less as well.

240se · 04-10-2019, 05:07 PM

I am running a set of 4 Michelin PS4S in 275/35-19 on the sport rays. A couple of track days and a some autox runs and I like it. The Michelin PS4S have not worn as much as I thought they would but I'm thinking of trying some 200TW tires for more grip.

Brendan · 04-11-2019, 10:09 PM

I've gone as high as 285 on my fronts no issue and I drove the crap out of my car. The only reason I went back to 275 is because I plan on running that size when i go to 18s.

04-08-2019, 08:08 PM	#1 (permalink)
clee078 Base Member Join Date: Jan 2009 Location: SF Bay Area Posts: 31 Drives: 40th Rep Power: 16	275/35-19 on Front Stock Sport Rays for track use? From what I've read, the fitment shouldn't be an issue to run the standard rear tire size on the stock front wheels. My suspension is fully stock. What I'm wondering is if this is safe for track days (9" rim width is the narrowest acceptable rim width for 275s). My thought is running a square 275 will dial out a bit of the understeer, and maybe help a touch with the sidewall rollover I'm getting on 245s. But, primarily looking for balance and more grip. Currently running Michelin PS4S. Would consider going to a bit more extreme like RE71R at the next change.

04-08-2019, 08:40 PM	#2 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7335	275 is fine on the fronts. Lots of guys run a 275 square with Rays Sports on track. Try a set of Kuhmo V720's and keep pressure between 32 and 34 psi. Some guys had issues with delamination, but they wore perfectly all day at Sebring. They're hundreds less as well. __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction

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04-10-2019, 05:07 PM	#3 (permalink)
240se Enthusiast Member Join Date: Nov 2013 Location: VA Posts: 260 Drives: Gunmetal 12' Rep Power: 12	I am running a set of 4 Michelin PS4S in 275/35-19 on the sport rays. A couple of track days and a some autox runs and I like it. The Michelin PS4S have not worn as much as I thought they would but I'm thinking of trying some 200TW tires for more grip.

04-11-2019, 10:09 PM	#4 (permalink)
Brendan Track Member Join Date: Apr 2013 Location: Colorado Posts: 640 Drives: Poor man's Porsche Rep Power: 542	I've gone as high as 285 on my fronts no issue and I drove the crap out of my car. The only reason I went back to 275 is because I plan on running that size when i go to 18s.