Tire questions.

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kustomizm
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Tire questions.

Postby kustomizm » Wed Jul 03, 2013 12:07 pm

So Tire Rack has Hankook R-S3 265/35r18 on closeout. I am leaning towards them considering they are about $400 a set cheaper than the 265/40 18 i was looking at. so calling Tire Rack they thought the 40 series could be a little loose handling wise on a 9" wheel. they thought the 35 would be better handling wise on the skinny wheel. these are shorter diameter wise too .41 inches and a gearing would be .65 mph at 40mph vs my existing track tire. About 5mph at 65mph vs my street tires. Do you think it would be worth a try or stay with the 245/40. i think these will still spin easy on the start being shorter although they are .8 inches wider but i am inclined to try them to gain the larger footprint.
Derek R. #30 Silver 2011 Ford Mustang GT

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Re: Tire questions.

Postby saabman » Wed Jul 03, 2013 3:04 pm

Giving the design width for the tire is a 9-10 inch wheel, you would seem to be ok running the 265/35. But have you ever taken tire temps to see if you are generating any heat in your tires. Even on Hoosiers I can spin at the start, but they give plenty of grip on course. Just sayin....
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SoloSE-R
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Re: Tire questions.

Postby SoloSE-R » Wed Jul 03, 2013 4:46 pm

The difference between your tires and these is less than the difference between any set of tires at full tread and that same set at 2/32". In other words, I wouldn't worry about it. Be aware, though, that the closeout RS3s are the 140 treadwear version that may or my not be legal in the class you want to run next season (depending on which class that is and what rules they've settled on).
Josh
2007 Honda S2000 - Laguna Blue - B Street - TCK DA Konis/Karcepts FSB/no muffler/Hankook RS3
2005 Volvo V70R - Titanium Grey - 6MT - Stock - DD

kustomizm
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Re: Tire questions.

Postby kustomizm » Thu Jul 04, 2013 6:42 am

Chris, I haven't taken tire temps but they do get hot and sticky. Josh, that is a good point with classing. Right now I'm in a street touring class which is limited to 140. Unsure if they are changing to 200 next year though. Do you think these 265/35 will be a looser tire than the 245/40 i am currently running? Goven the rim width?
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Re: Tire questions.

Postby saabman » Thu Jul 04, 2013 7:26 am

No, I suspect you wont see much difference in squirm (tread) or flex (sidewall). Have you looked at the width of the tread between the two tires. There can be a great deal of variance in the tread width in a given size. Hot and sticky is good, when you add a wider tire it will spread the load more and heat less.
Chris

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kustomizm
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Re: Tire questions.

Postby kustomizm » Thu Jul 04, 2013 8:29 am

If these are the same compound as current R-S3 and are being relabeled as 200 treadwear wouldnt an older version still be legal? I am breaking down and ordering them later today I think. After looking at my current tires are a little small the rim/tire are almost even. Rim a little wider. For my wheels I think the wider will be better.
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Re: Tire questions.

Postby SoloSE-R » Thu Jul 04, 2013 8:39 am

saabman wrote: Hot and sticky is good, when you add a wider tire it will spread the load more and heat less.


With street tires, managing heat is usually more important than just getting them warmed up. The Rivals seem to be the least heat-sensitive of the fast street tires (I've had some pretty fast first runs, and it takes a lot to overheat them). The RS3s need to warm up a bit, and rarely fall off unless they're being dual driven on a 90 degree day. Once they overheat, they kinda go off a cliff, though. The Dunlops typically need to be sprayed after 2 runs on a cold day and between every run on a hot day. Heavy cars tend toward overheating tires more rapidly though - my competitor in NER with the Shelby Mustang sprays his Rivals on hot days, I have not felt the need to spray mine. Even with 9 rapid fire runs at the Evo school, they only felt slightly greasy and the times were consistent within a couple tenths.
Josh
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Re: Tire questions.

Postby SoloSE-R » Thu Jul 04, 2013 8:47 am

kustomizm wrote:If these are the same compound as current R-S3 and are being relabeled as 200 treadwear wouldnt an older version still be legal? I am breaking down and ordering them later today I think. After looking at my current tires are a little small the rim/tire are almost even. Rim a little wider. For my wheels I think the wider will be better.


As of the current proposal, it looks like 140 TW tires will be legal through the 2014 season.
Josh
2007 Honda S2000 - Laguna Blue - B Street - TCK DA Konis/Karcepts FSB/no muffler/Hankook RS3
2005 Volvo V70R - Titanium Grey - 6MT - Stock - DD

kustomizm
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Re: Tire questions.

Postby kustomizm » Fri Jul 05, 2013 7:10 am

Do you know what size Rivals are on the Shelby Mustang?
Derek R. #30 Silver 2011 Ford Mustang GT

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Re: Tire questions.

Postby kustomizm » Mon Jul 08, 2013 4:57 pm

Tires ordered. 265/35-18 Hankook R-S3
Derek R. #30 Silver 2011 Ford Mustang GT


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