mkk62

so far i like kuhmos...drove for 5 yrs street tires, then r888's and nittos for 2, last yr running kuhmos ..dropped 1-2 sec sebring...but i only get 16 hc's i corded inside rears despite flipping tires ...making some alignment adjustments to increase tire wear..i am on my 3rd and 4th set and run the 245 squares / 305's rear as they are closer to stock heights...(wheel and tire) never had the delamination deputydog issue. gonna try hoosiers next...

Leigh2

Blake,

I bought these last fall and they did not have the 245/35 in a square profile to match the rears. I called Kumho and they said no problem plus Tirerack put me in touch with another guy using the same setup on a 6GT3 and he was happy. I really wanted to go with the 245/35 to get more fender clearance in the front as the car is very low and I had already ripped out a fender liner with the 40 series Nittos....even with 800 lb front springs. Plus I thought the extra rake would help keep the front end down at speed. So far so good at both Chuckwalla and Spring Mountain as I was the fastest street car at both events.
Spring Mountain was running the 2.9 mile configuration which features a bumpy very high speed (130+) chicane. the car was still a bit floaty but not as bad as it was running the climbing S's at VIR with softer springs and the 40 series Nittos. I like the combination using the shorter fronts. Next I'm going to try the Hoosiers so that I can get a 255/35 front to see if the braking improves.

Peter

AudiOn19s

No issues with ABS or anything due to the rolling diameter difference I assume?

996FLT6

I think the round up front vs square would be better. If u put the 35 vs 40 together side by side the round is wider ie more contact patch which is good for our cars. Mike

deputydog95

I ran mixed profiles in the kumhos out of necessity. That was all that fit in the 997 fitments. No issues. With that being said, I now have two stacks of hoosiers. Done with K's...

HiWind

Are H's similar prices to K's?

deputydog95

Yep, allegedly the K's last longer. I didn't have that experience. I don't find the K's nearly as fast either.

AudiOn19s

huh, would have thought otherwise, good to know.

(my cheap *** will still probably just buy Nitto's and go slide around on them all season to keep costs down )

Leigh2

No ABS issues at all...

AudiOn19s

What alignment settings are you guys running with the Kuhmo's? Particularly those of you getting 30+ heat cycles out of them.

996FLT6

Camber -3.2 front -3 rear toe in rear 0 toe front on stock rim size/offset caster ~ 8. This is driving to/for track. I flipped once and rotate side to side 4 times. 40 psi going to/fro track 30-31 hot on track. Mike

blake

Awesome - thanks!

I'm a little confused... -3 rear toe, or -3 rear camber?

Thx

himself

Here is the translation. FWIW, -3 rear toe would be CRAZY. Mike didn't give you the toe-in amount. It's like .13' or so.

Camber -3.2 front -3 rear

Toe in rear
0 toe front on stock rim size/offset

caster ~ 8.

This is driving to/for track.

I flipped once and rotate side to side 4 times.
40 psi going to/fro track 30-31 hot on track. Mike

996FLT6

^ what he translated : ). Mike

blake

Cool - thanks. My real intent was to drill down on the rear toe numbers that you guys are running. My current set-up has 0 in front, and 2-3mm per wheel in the rear. I am about to get another alignment after buying new tires (Kumho or R6s - done with MSCs), so wanted to double check...

-B