Matt86Z

Hey. I've got a set of 15x10 Eagles here at the house, and I'm wondering if I could mount these on all four corners for Autocross. Also, would they be any good for a 100 (or so) second course, and which rims should I be looking out for to get the offsets and stuff right?

Axoid

I think you'll have to run in a prepared class with dedicated race cars. Stock, Street Prepared and Street Modified all require DOT tires and it doesn't sound like the tires that you have are DOT legal.

AFrikinGoodTime

Roadrace slicks are better than average street tires in autocross, however they do not heat up as fast as an auto-x tire. This will not allow there full potential. You will most likely get into trouble trying to prewarm your tires in the pit area .

Matt86Z

...they're marked D1002 FOR RACING ONLY, NOT FOR HIGHWAY USE...

Any idea on a DOT rating?

AFrikinGoodTime

DOT ratings are only for highway tires. You are probably refering to rubber compound.

Her are 3 tire terms for you.
1) DOT rated- means highway legal
2)UTQG- uniform tire quality grade
3)Rubber compound- basically the softness or stiff ness of the rubber used.

You can have the same treadwear, temp, and traction ratings on tires but they will not handle the same. These ratings do not have anything to do with rubber compound and the ratings are only a comparison for the tire's specific use-a.k.a. Auto-x, or roadrace. A roadrace tire is designed to handle higher speeds thus more heat and need to be warmed before the will attain max. traction. Where as an Auto-x tire has a rubber compound type that will heat up quickly for short runs and will wearout fast for prolonged highspeed use. Again, each of these tires can have the same UTQG ratings ( ex.- 40 C A) 40 is tread wear, C is wet braking traction ( not cornering traction) and A is temperature resistence (meaning how well it can resist overheating at the speed it is designed for)

LILRED383

What is an auto-cross tire?

AFrikinGoodTime

Here's an add from Hoosier. Just one of many Auto-x tire manufacturers:
The Hoosier R3S03 and A3S03 radials are Hoosier's latest generation of DOT legal competition tires. The R3S03 (Racing) tire features a tread compound suitable for track and road racing applications, while the A3S03 (Autocross) tire features a tread compound tuned for autocross competition. The Hoosier R3S03 and A3S03 are the lightest of the DOT legal competition tires.

All Hoosier Sports Car DOT radials have passed DOT requirements but have a special tread compound to facilitate racing. Due to this special compound, these tires are not suitable for highway use as the expected miles of wear of these tires is greatly reduced.

The R3S03 and A3S03 tires feature an asymmetric tread design (which looks directional, but isn't) and can be used on either side of the car. They are molded with a tread depth of just 4/32" so they will not require shaving for competition, however they will benefit from heat cycling before competition to enhance wear and provide more consistent performance.

The R3S03 and A3S03 have a symmetric internal construction that features nylon cord radial carcass plies reinforced by two fiberglass belts and a circumferential nylon cap ply under the tread. While the R3S03 and A3S03 have an inflated shape with rounded shoulders to better compliment camber challenged cars, they still benefit from vehicle alignments that offer significant negative camber. Be sure to read Hoosier Tire Care Tips for advice on the use of these tires.