Toilets

Is it true that besides the Hoosiers, there are no r-compounds in my size? (275/35/18, 325/30/19) . Tire rack is showing no options.

I'd like a set of tires for my hpde and autox events but don't want a full slick like the Hoosiers.

What are my options?

Can I go to a 285/35/18 and 345/30/19? That way I can get nittos.

Thanks, car is a 2012 gs.

jlutherva

Check your e-mail for a spreadsheet on tire specs.

Jim

Toilets

Very nice thank you. Why are some in yellow? I guess really no choices for r compounds then...

jlutherva

I don't see the tire you are referring to, I do see a 285/40-18 NT05R. That's a little larger in diameter than I would go on the front. Also, that's listed as a drag racing tire. Diameters are 27.02 for the 285/40-18 and 27.36 for the 345/30-19. Ratio is .99. OEM is .959

Jim

Toilets

Is there a certain tolerance that you should be at in regards to the Oem .959 ratio?

And can 345s fit on my gs rims without doing any modifications to them?

jlutherva

Hopefully someone will chime in with thoughts on the ratio. I do know that 0.944 does work OK. I would almost bet that 0.99 will give engine drag alerts. I'm also not sure these tires will actually fit on the front of a GS.

WRT the fit of the 345/30-19's, I had no problem with R6's in this size.

Jim

trapp

I've been looking for awhile...you really don't have a really good option but Hoosiers...R6 or A6. You have to stay within 5% of the ratio difference of the stock sizes so to not mess with your nannies. The computer will detect a False tire slippage if your ratio (diameters) front vs back are off by more then 5 %.
You can find front scrubs fairly easy but the rears you might have to buy new. If you find something that works let me know....

Tom

Toilets

It looks as if the cup tires in the 285/35 18 and 345/30 19 may work and seem to be my only option without going to Hoosiers. I have nothing against Hoosiers but from a learning perspective I have heard they are not a good tire.

95jersey

If your goal is to learn, then stay on street tires until you are ready to move to Hoosiers. I would say once you have spent a successful season in Intermediate, you are ready to move up. Most folks run 295/18F and 345/19R. I run the 285 in the front personally.

jlutherva

For the first two years, I ran the OEM F1 tires. You can buy these fairly cheap and they make a good tire to learn on. They can get as hard as bricks after a bunch of heat cycles but up until then, they are a good learning tire and not hard on the budget.

Jim

DLevey

I run Kumho v710 335/30/19 rear and 305/30/18 front, they used to be alot cheaper the Hoosier's but not so any more