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      09-17-2014, 11:53 PM   #1
White 13
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Question Need some AutoX tires.

I need to buy some tires that I can use next year for AutoX in F Street. I have been very happy with the Yokohama AD08R with a treadwear rating 180. Unless I have missed something I will need a treadwear rating of 200 starting in 2015.

Wheels will be the ZCP 19 inch and I donít plan on getting a set of 18 inch wheels. They will be used for street driving but leaning toward AutoX.

I tried the Michelin PSS and they didnít hold up for AutoX. Tire Rack doesnít recommend those for hard use but instead suggests either the Yokohama AD08 or the Bridgestone RE-11, both having Tire Rack's extreme performance rating. RE-11 doesnít come in one size up with those for both the front and rear; I can live with that but would like to up size to 255 35 19 and 275 35 19 if I could.

I called Yokohama and the service rep in the competition department said they were not planning to re-rate the AD08 at this time. She also thought maybe the rule change may not go through but I have not seen anything to indicate that.

Anyone have any other suggestions I should check on before going with the RE-11?
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      09-18-2014, 10:55 AM   #2
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In the 255F 275R combo I really don't see an ideal autocross tire. In addition to the RE11, the Dunlop Direzza Z2 Star Spec, Hankook Ventus RS3, BF Goodrich Rival are all comparable to the AD08R but none of them have that combination.

The Super Sport are a phenomenal street tire, but just as you note, they are not really built to take the sustained abuse of motorsports use.
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      09-18-2014, 04:26 PM   #3
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Quote:
Originally Posted by ben@tirerack View Post
In the 255F 275R combo I really don't see an ideal autocross tire. In addition to the RE11, the Dunlop Direzza Z2 Star Spec, Hankook Ventus RS3, BF Goodrich Rival are all comparable to the AD08R but none of them have that combination.

The Super Sport are a phenomenal street tire, but just as you note, they are not really built to take the sustained abuse of motorsports use.
Thank you Ben,

Looks like very slim pickings for a M3 with 19 inch wheels in stock size or one size up. All of the above except the Bridgestone RE-11 won’t meet my needs for an AutoX tire from what I can see. I sure hope some manufacturer takes notice and gets some competition going. Seems like there is some easy money to be made here, just in case someone were to ask you.
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      09-23-2014, 09:24 PM   #4
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Quote:
Originally Posted by White 13
Quote:
Originally Posted by ben@tirerack View Post
In the 255F 275R combo I really don't see an ideal autocross tire. In addition to the RE11, the Dunlop Direzza Z2 Star Spec, Hankook Ventus RS3, BF Goodrich Rival are all comparable to the AD08R but none of them have that combination.

The Super Sport are a phenomenal street tire, but just as you note, they are not really built to take the sustained abuse of motorsports use.
Thank you Ben,

Looks like very slim pickings for a M3 with 19 inch wheels in stock size or one size up. All of the above except the Bridgestone RE-11 won’t meet my needs for an AutoX tire from what I can see. I sure hope some manufacturer takes notice and gets some competition going. Seems like there is some easy money to be made here, just in case someone were to ask you.
Yep. But there is hope. Don't be a slave to sizing. Pick the right tire first, its more important. Go with the 245/35 and 275/35 RS3v2 if you must stick with 19's. Hopefully you aren't afraid of adjusting the balance to compensate for more grip anyway, so any change in balance due to more stagger is easy to tune out and will have more ultimate dry grip than the PSS (and better wear). On an autocross course the car wants a little stagger anyway IMO, 2nd gear on street tires is wheelspin management anyway. Pretty well settled that the re11 is nowhere near the rs3 in ultimate grip, in fact rs3 is the tire that won FS nationals this year

But I recommend you take advantage of the -1 wheel size allowance (Apex now sells an 18x9 et31 and 18x10 et25 in their new wheel style which is perfect for this) or go with PSS or poorly sized RS3's. Rivals may have some 19" sizes soon too.

But you are really limiting yourself with not going to 18's. Lots of good options and wider ones too. A 9"/10" wheel combo is more than enough, for instance, to support the 275 and 295 BFG Rival. Before Hoosiers were banned (boo) I ran the 295/315 18" and there was tons of space, tire height was just right, and 19" tires were limited then too due to the m3's tire height limitations in front
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      09-24-2014, 12:52 AM   #5
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Good points. I really looked at the RS3 but then just decided on the RE-11 Bridgestone just to keep the size correct. Hopefully this will just be until something else comes along. Even better maybe I will like them. Tried the PSS and that didn't work out. With the new M3/M4 using 255/275 sizing maybe more manufactures will look at that combination. I sure wish Yokohama would upgrade the AD08 to a 200 treadwear.

Thanks for the help.
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      09-24-2014, 08:53 AM   #6
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I'd go to 18" also -- just pick put a set of Apex wheels as Rich mentioned, and now the world of possibilities opens up. You'll be able to choose an autox focused tire which is a huge compromise on the street (i.e. something like the Rival is molded at 7.1/32" to comply with min tread depth SCCA rules which obviously isn't ideal to buy and put into daily use) not to mention how street miles will be continually heat cycling the tires.

That said, "I think" BFG should be coming out with more 19" sizes next year to add to the one 19" size now.

Second thought is that supposedly Michelin gave a tire clinic at the Monterey this year where they supposedly stated their intention was to make the Pilot Sport Cup 2 a dominant choice for street tire autocross next year with sizes down through 18" (and I assume a re-rating of the treadwear to 200 from 180). Here's link to a board member discussing this subject. The PSC2 is a fantastic tire, but whether or not it will be a great autox tire (i.e. come up to operating temp quick enough) remains to be seen. I'd love to test some now as they are available in 255/35-19 and 275/35-19, but the current tires are 180TW so not street tire class legal.

I find it odd that the above quoted tire clinic outlined such a plan for the PSC2 though given that BFG is Michelin, so thinking further, maybe what's coming is a Rival 2? A combination of the PSC2 and Rival into an even more worthy street tire for next season? Who knows, but it probably is worth waiting until early next season to see how the tire situation sorts itself out.
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      09-24-2014, 11:20 AM   #7
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And heeeere come the $400+ tires to have in Street classes if that's true for these near-r-compounds like the psc2 and trofeo etc. That didn't take long.
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      09-25-2014, 09:52 PM   #8
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Quote:
Originally Posted by Richbot View Post
Yep. But there is hope. Don't be a slave to sizing. Pick the right tire first, its more important.
Hi Richbot,

Do you think this is still true if you had to choose between a tire like the Dunlop or RS3 at OEM sizes versus an inferior tire at F 265/35ZR18 and R 295/35ZR18?

At what point do you give up on a particular tire since there are so many other options in sizes in tires like the super sport?

I find myself facing the same issue since I like to keep my fender gap under control by not going too much smaller in overall height (Yes, it should be function over form, but I can't help myself since we can't use lowering springs for this class).

Thanks!
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      09-26-2014, 08:06 AM   #9
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Having run 2013 season with 245/40-18 Rivals all around (since the 275/35 wasn't yet available), I'd definitely support what Rich has stated. The right tires (street tire class focused/designed tires) in stock sizes will be superior to all the other choices (non-street-tire-class-typical-high performance tires) in larger sizes.
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      09-26-2014, 04:50 PM   #10
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Great, thanks for the input. That's exactly what I was looking for.

Looks like it will be OEM sizes for me.
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      09-26-2014, 06:57 PM   #11
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More tire discussion in this thread also.
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      11-16-2014, 01:55 PM   #12
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I've already got a pair of ARC-8 18x9's (going to trade a pair of 18x8.5's plus cash or buy outright) and will get a pair of the 18x10 et 25. 18's are the answer based on choices and gearing. I'm been through every UHP tire in the past four years and feel the Dunlop Z2 SS (265/35-18F/275/35-18R) or the R-S3 v2 (265/35-18F/285/35-18R) but will keep an eye on the PSC2's but feel the PSS were way over-rated and didn't like the Rivals as they sit (pre-2014 Nat's testing) were not my style.
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