Track tires

1376 Views 14 Replies 7 Participants Last post by wtknght1, Apr 18, 2001

John K

Discussion Starter · Feb 22, 2001

What do you guys think of buying track tires in the stock C5 sizes? I'm trying to buy a set of track tires on a budget and this option seems pretty good. I can get a set of 97-99 wheels pretty cheap and BFG R1A's in the stock sizes are pretty cheap too. I know this won't be the optimum combo but what do you think about this for the price/performance compromise?

Thanks,

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John Kelchen
'01 Blk/Blk ZO6

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Jose Gonzalez

· #2 · Feb 26, 2001

Hello John

From what I hear, the BFG's R1 and R1A will soon be history. That info. came from Tirerack. But, they still may have some available. For the next few months, the only option would be the Hoosiers in a 18 inch wheel. Kumhos will be out around June. That info. came from Ruby at Kumho. An option might be to go with C4 wheels. Either the Grant sport or the late model wheels. My understanding is that the off set is similiar. This way you would have the option of running kumhos, which thay say give you the most bang for your buck.

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Jose Gonzalez
Primo Racing one bad black Corvette

Jose Gonzalez

· #3 · Feb 26, 2001

A correction on release date for Kumhos. Ruby at Kumho said late April or early may.

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Jose Gonzalez
Primo Racing one bad black Corvette

Dave Schotz

· #4 · Feb 27, 2001

John, 275/40/17 is perfect for a 9 1/2" wheel! I wouldn't worry about the difference. You will like the Kumho's they Rock! (IMO)
Dave

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Dave Schotz
2001 Z-06 White w/Mod Red
Solo 2 SS Class #39
www.sccaforums.com

John K

Discussion Starter · #5 · Feb 27, 2001

You're right Dave, I ran 275's on 9" rims for quite some time. I was trying to remember the SCCA rule on tire size for stock classes. Isn't within 10% of the stock size is OK? I haven't autox'd in a long time and would like to start doing a few this year. If the 10% rule that I remember is correct then 275's would work nicely.

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John Kelchen
'01 Blk/Blk ZO6

John K

Discussion Starter · #6 · Feb 27, 2001

Jose,

Thank you for replying and the info. I've been curious about Kumho for some time; a few of my f-body buds swear by them but I've always been a BFG man. It's true that BFG DOT track tires are history. Don't know if that's a bad thing if Kumho is coming out with 18's. Anyway I went the cheap route for now. Bought some 2000 C5 knock-off wheels and some close-out BFG R1A's from Tire Rack. Total cost not much more than I'm selling my set of 17x9's for.

BTW, do you know if Kumho is going to make a front tire the correct size for the Z? I don't know of anyone making a 265/40 17 currently.

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John Kelchen
'01 Blk/Blk ZO6

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John K

Discussion Starter · #7 · Feb 28, 2001

Thanks Jose, I'm probably remembering a long-outdated rule. Sounds like I'll be completely legal with my regular C5 wheel/tire combo although at a disadvantage.

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John Kelchen
'01 Blk/Blk ZO6

Gordy M

· #8 · Feb 28, 2001

Jose

Is the SCCA tire rule for new type of tire or does it relate to tire sizes. As I recall, it started years ago when BFG released their autocross tires at the Nationals in certain sizes. The following year the rule was changed to the April 30 and the tire had to be available in so many sizes per diameter. Haven't run SCCA for several years but that is what I remembered.

They moved my 64 vette from FS to AS (it was not even competitive in FS with the 6 " wide wheels)

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01 Z06 Black
64 FI RED Convt.

Jose Gonzalez

· #9 · Feb 28, 2001

The 2001 SCCA rule book says that the tire must fit the stock wheel and fender without modification on the fenders. I can not find anything on the +/-10% rule.

Something else that might be an issue is that the Rule book say that you can not us any tire that comes out after April 30. This might be a problem with Kumho, especially at Nationals. There are some real protest happy folk at this event.

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Jose Gonzalez
Primo Racing one bad black Corvette

Jose Gonzalez

· #10 · Mar 1, 2001

The SCCA rule is that any new tire must be available by April 30. By their rules, just about any change would make the tire new. The way I read it the Kumho would be seen as new. The tires must also be available in four diameters and at least six sizes.

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Jose Gonzalez
Primo Racing one bad black Corvette

Jose Gonzalez

· #11 · Mar 12, 2001

I ran my Z06 at it's first Auto X this weekend. I bought some 295 BFG R1A that tirerack had listed a $120 eack. I got about 15 runs and they are shot. I did not know BFG's history with the g force tires when bought them. Thank God I was so smart to buy 4 of the 295. Any body want to buy those two from me? HA HA.

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Jose Gonzalez
Primo Racing one bad black Corvette

Mike

· #12 · Mar 27, 2001

I would like some advice on getting a spare set of wheels and tires for my Z06. I will be mostly autocrossing the car, with some roadracing later this year. My choices are to buy the ZR-1 wheels, 17 x 9.5 and 17 x 11, then put 275/40 and 315/35 Kumhos on them. Or, I can buy a set of chrome Z06 wheels and use these for street, racing my current stock wheels with Hoosiers on them.

What do you think would work the best? Do the ZR-1 wheels and especially the 315 tires fit?

Jose Gonzalez

· #13 · Apr 13, 2001

My understanding is that the Grand Sport wheels will fit on the Z06. The ZR1 wheel looks like the Grand Sport but have a different off set. The ZR1 may stick out the fenders. Something else to keep in mind is that both the ZR1 and Grand Sport wheels are against the rules on a C5 in the SCCA if you run in Super Stock. You have to run the stock wheel size.

Mako

· #14 · Apr 18, 2001

I would love to have some recommendations on racing wheels and tires for track events. Both wheel and tire sizes and types. Light, durable and bad-a$$ looking would be great.

Thanks!

wtknght1

· #15 · Apr 18, 2001

SCCA T1 rules say that you can run p315s all around with 17 x 10 in front and 17 x 11 in the back and the tires can stick out up to an inch. Kumhos are awesome tires...no doubt! Running the 315s in front eliminate the push somewhat in the car and definitely helps out on threshold braking. The 275s are really just worked too hard.

I run (and sell) Kinesis wheels. Check out www.tracktapes.com for some photos.

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