pratner

So running in the stock class of nccc in autocrossing and going for points. Right now I'm running on some firestone runflats and am about to order some wheels and tires for the track. I'm very limited on what I can do to stay in the stock class, I know I have to stay with stock wheel size which are the 18 in front and 19 in back, and I know I have to stay on street tires so which tires do you guys recommend that will fit the 19's and give the most grip. Guys I'm running against are running kuhmo Ekstas (or something like that) I didn't know if there is anything better that will fit the wheel size. Thanks in advance.

stormgti

Bridgestone R-11, tread wear 180 will give you good traction on track and street will fit OME wheel size.

TorontoC6

RE-11's get my vote.

Do you have to stay stock size? I run 265 front 305 rear. I put them on last year, ran 8 track days, and 7500km's last year and hope they last most of this season.

Another suggestion would be the Kumho XS.

NASCAR314

The Kumho Ecsta XS is the best "bang for the buck" Damm good tire! available in stock sizes as well.

The Bridgestone Potenza RE-11 is great as well, costs a little more.

As for sizes, in NCCC you can go up or down 10mm in width, and up or down 5 on the aspect ratio (sidewall), so if you go with RE-11's you can run a 255/35ZR18 on the fronts, stock wheels, and stock size on rear. (285/35ZR19) Probably the "Hot Ticket" in group 1S at the moment.

avizandum

The 255's with a 285 will throw off the rake and for 10mm it's not worth it...

For autocross only, I'd take the Bridgestones. I've run both.

NASCAR314

25.7" dia. for the 245-40-18
25.0" dia. for the 255-35-18

so your front end will drop approx. 0.35" (less than 3/8")

For "Street" class, 1SK in NCCC autocross, I don't think the change in rake will matter......my opinion anyway. But for only gaining 10mm in width, it is pretty irrelevant either way. Splittin' hairs here. The Kumho Ecsta XS's will be about $175 less (per set) than the Bridgestone's if that makes a difference to you.

TrollRoadToNoWhere

If you really wanted performance, you would ditch the factory 18/19 and go with some 26" spinners. The low profile of the tire will offset the higher weight. Plus it will look dope. Yo. Forget the rules, rules were meant to be broken.

Bob Troll

running in the stock class of nccc in autocrossing and going for points. Right now I'm running on some firestone runflats and am about to order some wheels and tires for the track. I'm very limited on what I can do to stay in the stock class, I know I have to stay with stock wheel size which are the 18 in front and 19 in back, and I know I have to stay on street tires so which tires do you guys recommend that will fit the 19's and give the most grip. Guys I'm running against are running kuhmo Ekstas (or something like that) I didn't know if there is anything better that will fit the wheel size. Thanks in advance.

The Kuhmo Ekstas are a mighty fine tire, but I find the Kuhmo Estratas being better due to them sticking to the road better and also helping the gear manifold rotate at a much higher acceleration. When racing, because I'm always racing, I make sure my mud flaps are high and tight and lowered about 7 inches, the lowering of the mud flaps helps the gear manifold rotate, too. I hope this helps, and as Dale Jarrett always said, "When you are running against guys with Kuhmo Ekstas, it's always best to have Kuhmo Estratas!"

TrollRoadToNoWhere

Bob-
Excellent point. However, if you lower too much, ie 7" the spinners will take out the mudflaps. You probably wanna go 5" at most, otherwise your spark tube will prematurely wear the Kuhmo Estratas. Seeing as they retail for over $200 per tire, this could get quite expensive. Keep that in mind OP.

pratner

Haha, alright I do appreciate the help guys, looking between the ecsta or r-11. Seems to be my only two options with that size rim. In your opinion are the r-11's worth the extra money?

NASCAR314

I have only run the Kumho Ecsta XS, .....several sets worth. So that is pretty much my opinion. People who have run the RE-11's say they are better. But they bought them.

I DO KNOW the Kumho's love heat, so if you are down South, you may like them as well. Wheel alignment is critical also. These C6's like to push in the front, add some neg. camber and as much caster as you can get.