Anybody tried these tires yet? I'm looking for a good track/autocross tire.
The Hoosier A-6's did good for autocross but that's it. R-6's are too cold
natured for autocross because of warm-up requirements. I've been looking
at Toyo's R888 295/30 x18 on all four corners. Been running 285/30 x18
T-1R's but not enough grip in dry conditions. Any input would be appreciated!
Thanks, Dave

 

They're related to the Toyo RA-1 and the Nitto NT01, and as such I believe it's more of a road race tire, rather than an autocross tire.

 

For the lighter car the v710 works well for both trackday and autoxes. They do get a little greasy on the track, but sticks just fine. However, they won't last nearly as long as the ra1/r888s. If you do frequent autox and only 1 or two track days a year, I'd run the v710s.

 

From the new grassroots magazine.
they tested the BFG r1 vs. kumho v710 vs. hoosier a6 vs r888 (the toyo ra1 replacement).
it was perfect test for me because they tried to use 285/30/18's which is what i want to run next season.
weird thing is they used stock rx8 wheels size of 18x 8.
i used to wonder if the hoosier would fit on my 9.5.....well they put it on an 8 inch wheel!!!
so i guess the hoosier would fit mine (tire rack specs says min for hoosier is 10.5 wheel).
then they put the v710 on and it didn't fit! Too wide. so they used a 245/35/18 instead.
they used a 295/30 for the R888.
v710 had the fastest 10 lap average and the fastest overall lap.
a6 second place. R1 3rd and R888 4th.

http://www.nnjr-pca.com/site/index.p...ewtopic&t=2333

 

That's interesting, I've always wondered about the benefits of stuffing huge tires on way too narrow rims (like a 225/45/15 on a 15x6). I always figured there had to be a point where the benefits trail off and it starts to be counterproductive. It seems that they may well have found just that point there. Nominally a 285 is an 11.2" wide tire, and it's on an 8" wheel! Those have only a 3.4" sidewall, not much room to stretch that much.

 

Thanks for the info guys! 2mchpwr....Seems like SCDrew on your link has
tried about everything; very informative! Based on his experience; sounds like
the best set-up would be A-6's for autocross/ R-6's for track. $$$ is what's
in the way of that...lol. Best combo for me may be (the cheaper route), R-6's
for track/autocross and keep my Toyo T-1R's for the wet. I can see I'd be
giving up some for autocross, but the track performance carries more weight
for me ( I have definitely got the BUG...LOL). Any further info is welcomed and
appreciated. Thanks, Dave

 

Stock class autocrossers often stuff way-too-wide tires onto narrow wheels because they're limited in wheel width by the rules. Everything is tradeoffs. For the stock class guys, more tire offsets the poorer response from the too narrow wheel. In the case of a tire that almost fits, sucking the sidewalls in with a narrow wheel may make it fit, but sidewall flex will be less than optimal. As always, it's all about coming up with the best net performance.

 

Putting a wide tire on a narrow rim will change the profile of the tire. The surface of the tire (tread area) will have a more rounded profile, which results in a smaller contact surface. This also leads to more sidewall rolling. It's better to fit the tire to the rim, rather than trying to go overboard with a wider tire...