ericstanley

Okay, so 2008 Solo2 Rules, 13.4 (Stock Category, Wheels), says:
On a car that has staggered sizes (like ours) does that mean that you have to run both factory sizes (is that what "as installed" means?) or can you run one of the factory sizes at all 4 wheels?

Also, I noticed that the tire section (13.3) doesn't seem to require OE tire sizes... does that mean that any tire size is acceptable so long as it fits on the OE wheel size?


Thanks,

Eric

Cashmo

Yes, if the car came with 17's up front and 18's in the rear that's what you have to run in Stock class. In every other class you can run whatever will fit.

Correct, any rubber that will fit. Does your local club offer a "Street Tire" class?

Jeff

ericstanley

Thanks... I figured as much, but wanted to make sure...

Honestly, I'm not sure... I'll find out. I plan to order a set of wheels and tires for A/X so I don't burn through an expensive set of street tires several times a year and I don't really want to damage my shinies. I'll likely look for a set of OEM C5 Z06 wheels and a set of DOT-R compounds to fit them (as wide as will fit, I guess).


The more I read in the rules the more I realize that I have some things to change about my car to get back down to stock class (intake and brakes, for example). I don't think I can be competitive in stock class let alone the next levels up...

SLandstra_Z06

"I'll likely look for a set of OEM C5 Z06 wheels and a set of DOT-R compounds to fit them (as wide as will fit, I guess)."

DOT-A compounds, not DOT-R's.

A is for Autocross (Hoosier A6's are the best tires for Solo)

Mojave

R compounds refer to more than just Hoosiers. There are Kumho's, Nittos, Toyos, etc, etc. R compound is any DOT approved race tire.

Some would argue that V710's are a better AX tire, but that is a debate for another day.

LehmanZ06

Yes the 710's are better if you are trying for longest time on course.

However where I run we generally always try for the shortest time, and that means Hoosiers.

Mojave

Plenty of National Championships have been won on V710's, but many would agree the A6 is the tire to have. However, the point I was making was that R compounds refer to more than just Hoosiers.

Also, we can debate V710's vs A6's in another thread (not that I'm not agreeing with you).

doje

I have run both V710's and A6's on the Auto-X. I prefer the V710, but my car has a street/race alignment. In order to benefit from the A6, you need a lot more negative camber. I know people that have done this, and (in that case) the A6 is a superior choice.

ericstanley

To be honest, there are so many opinions and experiences about both tires, that at some point you just have to find a reason to pick one or the other. I picked Hoosier because I like the fact that they are an American company and always have been...

Bimota Guy

Cal Club (LA area SCCA) offers a street tire class ("SK"). Mod rules are as for stock class, but with a limit of 140 and above wear rating for the tires. This is an indexed class as several stock classes are combined into "SK1" and the others into "SK2" as follows:

SK1 – SS, AS, BS, FS
SK2 – CS, DS, ES, GS, HS

They are very popular classes.

San Diego region now has these same classes.