V710s are an autox tire, not open track.

I've got 7 or 8 events on my 275/40/17 Hoosier R5s that I bought on clearance directly from Hoosier before the R6s came out. I did flip them after the 5th event, and they still have more in them. Proper suspension settings are a key element on making them last. I don't drive to/from the track on them either.

 

Someone should clue in all the MX-5 Cup drivers that they are road racing on an autox tire.

Guess we should tell Dave Schotz as well.... How the hell did he put his fbody ahead of the T2 350Z's at the Run-offs on an autox tire.

 

Running 275 V710's on a 7.5" rim here.

 

Huh, then the other concern I would have with the 285's is fitting them under my fenders...

 

I ran 275/35/18 NT-01s on 9.5 inch 30mm offset rims all round for a lot of track days on an otherwise stock suspension last year and found them to be excellent.

Fitted fine, excellent grip, turn in response and progressive breakaway. Reasonable wear and they were driven very hard, although I paid the price for no camber adjustment with shoulder cording. No issues driving to and from the track except for the fact they are very noisy.
Ordering another set for this year

 

News to me as well... I took 1st place at the VIR GT Live Lap Battle event in my class on Saturday, and on Sunday took 2nd...both with the Kuhmo V710's - silly auto-x tire

Saturday 10/06/07 Results
Pos. Name Car # Car Time #1 Time #2 Time #3 Time #4 Time #5 Fastest
01 Bill Reynolds 114 Nissan 350Z 67.252 62.287 64.810 60.854 - - 60.854
02 Martin Detelbach 116 Mitsubishi Evo 66.837 63.487 RR 61.545 61.397 - - 61.397
03 Unknown 115 Subaru WRX 70.735 68.478 67.053 65.560 - - 65.560


Sunday 10/07/07 Results
Pos. Name Car # Car Time #1 Time #2 Time #3 Time #4 Time #5 Fastest
01 Jack Latham 113 Subaru STi 66.486 62.714 61.570 61.049 59.993 59.993
02 Bill Reynolds 114 Nissan 350Z 69.049 62.061 62.034 60.590 60.090 60.090
03 Carlos Cosme 127 Mtsubishi EVO 66.923 63.744 61.000 61.854 - - 61.000

 

Yeah, and most of the road racers at the National Championships that are running Hoosiers are running the A6 -- not the R6.

Silly serious amateur and professional drivers and mechanics with years of experience, what do they know?

(That being said, they usually don't plan on having the tires last more than one or two weekends before they replace them.)

 

I've had a few people tell me that too when I showed up at Road Atlanta, Roebling Road, and CMP with them. They rock as road course tires though. I love them.

 

Can you link me to the results of the race you are talking about? I'd like to see their lap times and compare the tires of the other competitors. All I found from a quick search was this: http://www.scca.com/documents/result...twaterpro2.pdf

which shows him taking 3rd on Kumhos while 1, 2, 4, 5, 6, and 8 were on Hoosiers (2004 data).

I think the general statement that V710s are for short autox/races/open tracking vs long races/lapping is pretty fair. They are a good cross-over tire for those that autox and lap, but I have heard and been part of complaints about them losing traction for 25 minutes of hot-lapping. Additionally, I think it's fair to state that the V710s don't have the longevity of the comparable R5 or R6 Hoosier for open lapping. That seemed to be what the OP was looking for. "I want some R-Comps for road course use (not autocross), so if they take a little bit of heat to get sticky, thats fine...However, I do want something that will last a decent number of track days, and will give me good handling."

 

Respectfully, you are talking about 4 ~60s laps. I'm talking about 12-15 two minute laps. Again: "I want some R-Comps for road course use (not autocross), so if they take a little bit of heat to get sticky, thats fine...However, I do want something that will last a decent number of track days, and will give me good handling."

 

Exactly, Scotts. It looks like the V710's are not for me, whereas the R888 or RA-1s might be the ticket. Now to choose between the two.

 

my dad runs the RA-1's on his Miata, they have lasted a LONG time. maybe he isn't driving them to the max, regardless it seems to be a good tire shaved down.

 

The RA-1's are some of the best lasting..and pretty darn good gripping tires out there. The R-888's are suppose to be even better with the new tread pattern that is suppose to reduce blocking.

 

Not sure why you are looking at autox results when we are talking about road racing. Even worse, you are looking at ProSolo results where his car got bumped up a class because they had low turnout. I have no idea where you got your info that the V710 is an autocross only tire, but you could not be more wrong.

People that overdrive can kill any tire in 25 min. Schotz had one of the heaviest cars in T2 and ran the entire race without a tire issue. The three cars ahead of him on the track were all lighter, with more power and all ran on the Hoosier A (autocross) compound tire. Again, guys that can drive can keep the tires under the car, they will also run whatever it takes to win. You will not see any of the track day bricks or "lapping" day compound tires in any of these results.

2007 SCCA Cahmpionship Run-offs
Qualifying: http://scca.org/popup/raceresult.asp...=5643&file=162 *note the quickest 350 also on the Kumho V710

Race: http://scca.org/popup/raceresult.asp...=5643&file=204

Do I need to give you a link for all of the MX-5 Cup results also? You know the Pro road race series where the V710 is the spec tire.

 

Nope. I stand corrected. The V710 clearly is the choice for many sanctioned competitive events as well as the comparable Hoosier A-series tire, and is not just an autox tire.

I still believe that someone looking for longevity out of a tire is better off to avoid the V710 tire. I know that's not what you are arguing, but feel it needs to be noted here for others reading.

Thanks for the info. Happy lapping.

 

Okay, found the R-888 and RA-1s on tiredeals4less.com in 275/35/18 for about 340 a piece The R-888 also come in 275/40 for about the same price, as wll as 85/30. I'm leary about the 285's for two reasons, first my front wheels are 8.5", and while people have said they will fit, and I'm sure they will, it still concerns me. Also, I'm not sure 285's will fit under my fenders, while I know the 275's will.

On the other hand, the R-888s also come in 265/35 for about $50 less per tire, which might not be a bad idea; give up 10 mm on each tire and save $200. Definitely make my wife happy with saving money, and when I do go to TT-2 for Time Trials with NASA, might save me some points (although in TT-S it's mostly based on HP/Lb's) 10 mm per tire wouldn't be giving up much grip, I wouldn't think.

Finally, any reason to go with the 35 aspect ratio versus the 40 aspect ratio, if I go with the 275's?

As a note, I have driven on R-Comps before; my previous track tires were BF-Goodrich G-Force R1's, with 245 in front and 265 in the rear. As I mentioned in my original post (I think), I was very happy with the grip, but not as happy with the longevity.

 

Whoa don't put that wide of a tire on an 8.5" rim! Just because it fits doesn't mean it's safe or will get you more grip.
Autox guys stuff wider tires on small rims due to class restrictions (and that fact that they're not lapping at over 100mph). I personally wouldn't go over the manuf recommendations for tire size per given rim. In fact, I try to stay in the lower spectrum to get the best contact patch. I would think that a 285 on an 8.5" rim would generate less grip than a 255 on an 8.5" rim and have worse wear.

 

So you think 265's on an 8.5" rim would be fine? I'd really like to stay with the same size tires front and rear, to try and prevent some of the understeer the G's have.

 

I personally wouldn't do it. Toyo's website recommends a 9" rim even for the 265.
Upgrade the front rims and don't tell the wife

 

Dave. Check Edgeracing.com for prices. Have America Tire/ Discount Tire price match.

Doesn't apply much to you. But I'm running 275/35 275/40 18s on 9.5" rims and it feels great for the street.