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Thread: Looking for new tires for autocross Reply to Thread
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Topic Review (Newest First)
07-22-2007 02:56 PM
Fogrider I have autoX-d on both the tires you mention, but in STU on appropriately prepped STi's. My buddy got the 615's and I got the -01R's. After initial break-in, his seemed to provide more crisp feedback on turn-in, but this advantage seemed to go away quickly with heat cycles. The 615's soon became obnoxiously loud and their wet adhesion never came close to the 01R's. I am happy with the Bridgestones. I also can't believe how well they have worn. I run -2.5 front -1.5 rear camber and zero toe. From the above, my vote for a daily driven autoX tire between these 2 would be the 01R.
That said, consider sizing. A narrow rim impinges a tire's ability to provide a wide contact patch. The width of the contact patch doen not increase linearly from 205 to 215 to 225 to 235 to 245 on a 7" wide rim. On my SVT Focus rally car (Production class) my tarmac set up is 1993 OEM 16" SVT Mustang rims with 225/45/16 Yokohama 048 R-compounds. This works great with the tall gear ratios of the Getrag and still fits over my SVT brakes.
Price: Tirerack has 225/45/17 -01R's for $125 with no rebates applied (I can't remember the date on the SCCA rebate cut off.) This is a lot of tire for this price point.
my $0.02
07-19-2007 08:01 PM
LazarusZX3 I'm running Faulken Azeni RT-615 215/40/16s on 16x7 Rotas. Mine is lowered with the Eibach Sportline 2'' drop. No rubbing issues. They are dedicated Auto-X tires. Everyone in my class only uses the Faulkens. They have mountains of grip! Amazing, amazing improvement over Kumho, Firestone, Federal. All of which I have had on the car before.
07-19-2007 03:37 PM
DirtyDeeds We're running 225/45-17 RT-615s on our SVT on stock 17x7 wheels as a daily driver without any problems. So far, the wear from daily driving has been okay.

We did encounter a little rubbing in hard turns over bumps. We pulled the fenders out just a tad by hand and the rubbing went away.
07-19-2007 02:42 AM
killer ZETEC look at fuzion tires. they might have something that works. i auto x using my stockers (lighter than the 19's) and at 35 psi these thing will not give up. they are pretty clear in letting you know when the limit is reached but they last a long time and are fine for wet/ dry driving (i have hri's i dont really know about the others) i think these are a good tire for the money and i will contiue to race on these till they wear themselves out
07-18-2007 10:24 PM
tiresmoker
Quote:
Originally Posted by focusedaddiction View Post
if your concerned about rubbing, you might consider trying a 215/40/17 . I'm 2"s lower & have no problems with clearance.
You can d.d. on azenis rt-615,s but you will save alot of money when you get a dedicated set of race wheels& tires.( they are great , but wear fast especially if you drive agressively.)
azenis won't last much more than a season & a half when D.D. & autoX!

In SM, you still have to run a "DOT" tire even if it's an "R" compound, other wise you will be bumped into a prepared or modified class.
I'm in SM & run Nitto NT-01's this year & love them, but be prepared to replace R comp.s every season. that's the nature of race tires.

Yeah I pretty much figured that going in. I've been running street tires for 2 years now, and it's close to the end of the season, only about 6 autocrosses left, so if I can ride the rest out on a good street tire then I'll be happy.

This winter I'm gonna get me a set of wheels with r-comps for autocrossing on so I don't have to worry anymore about dd'ing and auto-x'ing on the same tires. This is one of those situations where you got to pay to play. Damn my region for having so many autocrosses a year. lol

I was about 92.4567382% sure I still had to run a DOT r-comp in street mod. Even though the index will only be about 1-2% greater with a slick, every little bit helps ya know.

Thanks for the help everyone. I had my mind pretty much made up in some RT-615's, but I just wanted to get some opinions on them first. Looks like I'm gonna be getting me some Falkens.
07-18-2007 05:59 PM
focusedaddiction
Quote:
Originally Posted by tiresmoker View Post
I probibly should have mentioned that I'm lowered about 2 inches. That may end up causing me a problem.
if your concerned about rubbing, you might consider trying a 215/40/17 . I'm 2"s lower & have no problems with clearance.
You can d.d. on azenis rt-615,s but you will save alot of money when you get a dedicated set of race wheels& tires.( they are great , but wear fast especially if you drive agressively.)
azenis won't last much more than a season & a half when D.D. & autoX!
In SM, you still have to run a "DOT" tire even if it's an "R" compound, other wise you will be bumped into a prepared or modified class.
I'm in SM & run Nitto NT-01's this year & love them, but be prepared to replace R comp.s every season. that's the nature of race tires.
07-18-2007 05:14 PM
WD40 Go to the motorsports section and check out the 595RS race tires.
You have seen the May issue of Grassroots Motorsports??
Page 103:
Quote:
The 595RS is also said to exhibit easy breakaway characteristics, a handy feature for those in the drift scene...
has alot of void area and quite a bit of flex in the sidewall, which made the tire feel pretty squishy and squirmy at the limit of adhesion
Sounds like a good drifting tire...(blech).
I certainly wouldn't swap out my RT-615s for the Federals for AutoCross/Road Race use.

BTW, the 595RS is no where near an R Compound tire...it's a street tire with a 180 TreadWear.
07-18-2007 04:38 PM
tiresmoker ^^^killer, I'll have to keep that in mind
07-18-2007 04:27 PM
b16sir1991 Ok, well if you get some dedicated rims, let me know. I can get a killer deal on some of these:
http://www.federaltire.com/
Go to the motorsports section and check out the 595RS race tires. I can get those for about $90 each.
07-18-2007 04:26 PM
miniboon that link has some great DOT r-comps on it, and the advice given to me before was that the 615's were something you could not go wrong with....next season they will be my dedicated AX tire, and probably on my dd wheels as well
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