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Old 02-06-2003, 06:17 PM   #1
mdot
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Default newbie tire question...tread wear rateing

For Auto-X most classes need a tread wear rateing of 140 or higher. When I go to the TireRack.com, I can't find anything in the tire spec that talks about this. What is it? and how do i know if the tire meets it?
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Old 02-06-2003, 06:36 PM   #2
Chuck H
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If you pick any random tire on the Tire Rack site, then click the "specs" button on the top of that page, it will bring you to a table of specs. One of the columns will be labelled "UTQG" (uniform tire quality grade). The first number in that section is the treadwear indicator. For any normal street tire, it's probably going to be greater than 200. Typically high numbers (like 300 or more) indicate either a harder rubber compound or a deeper tread. Unfortunately, though, those ratings are self-generated by the manufacturers and don't necessarily have anything to do with reality. They're sometimes artificially low on "performance" tires so that people will assume that they're stickier.

Pretty much the only tires that aren't going to pass the treadwear rating rule for auto-x are the ones the Tire Rack classifies as "Competition" tires. Since those are technically DOT legal, the treadwear rule is the way the SCCA keeps people from running race tires in street tire classes.

If you're looking for a tire to run in Street Touring class with, I'm pretty sure that the Falken Azenis pretty much own that class. Unfortunately, Tire Rack doesn't sell those.
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Old 02-06-2003, 07:06 PM   #3
mdot
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thanks. It was the "utqg" that I had no idea was about.

I was looking at what class I would be in. I recently bought a set of rims with yokahamas on them and was trying to fing the tread rating. Thanks for showing me how.
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Old 02-06-2003, 07:23 PM   #4
mdot
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If you don't mind one more question. If I'm running Vishnu stage 1 with struct tower braces on streat tires, I'm in STS class. But as soon as I put on the yokahama's (i just checked the tire raetings = 66!) I'm in ESP class?

I'm disapointed only in the fact that I'ld be the only one running in that class in my region. Last year i was stock DS and alone. I did fine in the PAX Novice class, but I was hoping to be in STS. So I could compare actuall times, rather than handicapped PAX times.
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Old 02-06-2003, 07:26 PM   #5
AnimalMother
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if you are running vishnu stage one then you are in SM. Otherwise, if you don't touch the factory boost control you would be in ESP or STX. The WRX does not fit in STS in any form.

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Old 02-06-2003, 09:16 PM   #6
Chuck H
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As a newbie, you're going to get smoked no matter what class you run in, so I'd just go with SM and not worry too much about getting trophies. The first year or two is always a learning experience and no one is naturally good at auto-x -- it takes lots of practice.

I made the mistake of thinking engine mods would help me out (I wanted them for the street, but figured I'd give autocrossing a try). And there's nothing more embarrassing than running a 200+ hp Neon with pretty decent suspension mods in SM and still getting smoked on raw times by the fast guys in bone-stock 132 hp SOHC Neons in ES. But it's a good way to learn that seat time is worth more than any mods you do to the car.
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Old 02-10-2003, 01:15 PM   #7
mdot
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This will be my second year auto crossing. And I did really well my first. so these engine mods are for me, not for the racing so much.

The reaon I thought the wrx was in STX (Sorry i misspelled when i said STS) was from this thread:

http://forums.nasioc.com/forums/show...hreadid=174189

which states that the wrx with vishnu is in STS.
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