CStewTAMU

I was planning on getting some Kumho Ecsta v710 275/40-17. Apparently there is a national backorder. The guy most our club member buy tires from called every supplier he knows and couldn't find any.

I am hessitant to get Hoosier a6's. I hear the A6's might be the fastest tire, but I also hear their performance diminishes faster over the life of the tire when compared to the V710.

I do want something I can get more laps out of as I do NCCC autocrosses due to the providing 4-5 times the numer of runs/track time compared to SCCA.

I think BF Goodrich makes a very similar competition tire. Anyone use those?

I do want a slick tire like the a6 or v710-not a street tire with tread.

RX7 KLR

We run the R1 on one of our Club Racing cars, and have autocrossed on them as well. They are great on the track, stand up to abuse very well, and put down consistent lap times - the BFG R1 actually won two classes at the Runoffs last year.

However, as an autocross tire they are not great. They take to long to heat up, and even at its peak will be about a second off the pace of the V710 or A6.

trapp

The V710's are on backorder or the Kumho XS's???

RX7 KLR

It seems pretty clear from his title, and text, that he is talking about the V710. There is no mention of the XS in his post at all.

trapp

I just checked.......both are backorder nation wide. I heard the XS were backorder thats why I asked..

BFoster

Does anyone know the reason why the V710's are backordered? I tried to order a set two months ago, and Tirerack said it would be at LEAST 12 weeks before they would get them back in stock...

I prefer the Kumhos to the Hoosiers, even though they are just a hair slower.

I was HOPING that Kumho just let the supply of V710s go, and have built a new, faster tire that they are preparing to roll out.

jaa1992

I've been running the R6 in time trials, seems to be as sticky as my ancient v710's were.
Not sure if it helps you on an autocross.

0Finspeed

Take a look at these, they are in stock and ready to ship.

http://www.finspeed.com/Michelin-Racing-Slicks-MCH.htm

Compared to the A6's, you will not be disappointed.

Sidney004

Kumho has been struggling financially as of lately and that may have something to do with it.

Lan.Jet

What is the life compared to the A6's I usually get two days.

NASCAR314

Try the Kumho V700 VictoRacer tire in 275-40-17 it is a simalar rubber compound to the V710, just an older design. It does have some tread for a short while, but soon wears off to a slick surface with 2 grooves around it.

(NOT a "street tire")

I just got a set of 4 from TireRack 2 weeks ago, in stock then.

Good autocross tire for NCCC, probably a half second or so off the A6, but lasts a hell of a lot longer

vettehardt

I've been running the Kumho Victoracer V700s on my 76. Work pretty good and last quite a while.

Gordy M

Goodyear has a new DOT race tire Eagle RS that is said to be equal to the Hoosiers but do not fall off as noticeable. Not sure if they are as good auto-crossing but it might be an alternative.

RX7 KLR

The current Eagle RS would not be a great autox tire, very much like the R1 it needs some heat. But GY is supposed to release an autox version in the future.

dvandentop

how many sessions per day?


a user on here who has gone through 20-25 sets of these has told me he usually quits using is after around 25 heat cycles so that is a good amount of time.

0Finspeed

20-25 heat cycles, and they start to really fall off; you will most likely run out of heat cycles before you run out of rubber. The wear is very comparable to the R6's but once heated up, they are stickier than A6's.

Cloaked323

Not to Hijack just one question
running CCW 18x11 18x13 rim sizes shod with 295/30ZR18 & 345/35ZR18 What is the proper slick size, I want to be able to run in comp mode.

dfinke23

I run CCW 18x11/18x13 C14's with 30/65 Michelins on the front and 31/71's on the rear. I run comp mode for the first lap, then shut everything off. I ran comp mode at RA for a session with no issues.

dvandentop runs the same setup.

dvandentop

threshold yes it works great on road america and also autobahn, i usually warm them up in comp mode but once you do a lap or 2 i turn all the nannies off and let it rip. hold on as the grip on them is insane. i probably have about 12 heat cycles in mine now and still holding strong. that is after around 6 25 minute sessions at road america and quite a few sessions at autobahn also.

Lan.Jet

About 180Min on the fronts and 360Min on rears. I love the grip but $$$$