1stz51

I use these tires for HPDE's. I usually start out at 26 PSI cold. just curious what others are doing.
Thanks,
Bill R

Bill Dearborn

In 10 and the beginning of 11 I used Nitto NT05s. Great wear. I got 26 track days and several autocrosses from them. However, on the track the tires weren't quite as capable as stock EMTs. In an autocross they seemed to be quite a bit better than the EMTs.

How do the Kumho's work for you?

Bill

1stz51

With my limited experience. I really liked them.very sticky but do not last as long as NT05's. I think that was because of press. took me awile to figure out press and tire wear. think I got 14 days outta them.
3 days were at TGPR which is very rough on tires. but cheap to go and 1 hr from the house.

MisterMidlifeCrisis

What did you do with the tire pressures with the XS?

DarkMastyr

I aim for somewhere around 37-38 psi hot. Seems to work ok, but I don't have extensive testing to back that up. Generally in the mornings it can be quite chilly in NorCal, so I start out around 26-27 psi cold, but will continue to let air out throughout the day as things warm up.

Personally I thought the XS's were going to be stickier than they are for 180 treadwear rating... maybe I'm too spoiled riding around with other guys in R Comps. You can really hear them though... here's a lap around Thunderhill with them.

MisterMidlifeCrisis

They're squealers, all right. When I first started HPDEs, I liked tires that made noise for the extra clues it gave me that I was close to the traction limits, but after a bit of experience, it started to just irritate me for some reason, so I switched to tires that are quieter.

Nice driving! Isn't it fun?

1stz51

yea that is about the same as me. these tires heat up pretty quick. and starting out at higher PSI cold this elevated hot PSI to were the center of the tire wore out quicker then the sides.

taken19

I would like to hear more on these tires as well. My PS2's are almost done and I was looking into these as replacements.

Anybody else with experience on these tires?

1stz51

I like 'em. Just ordered a new set, these tires seem to stay on back order quite a bit for C6 sizes. Hopefully I figured out air press were they will last a couple extra days.

wtb-z

I ran them this year, and usually around 35 hot. Might try a bit lower in the future.

For a "street" tire they take a whole lot of heat to actually make any grip but are otherwise very enjoyable.

Stock C5Z06.

taken19

How many track days did you get out of your last set?

wtb-z

I got 9 track days and about 5k street miles out of my set from full tread - they were still in the 3/32nd range but fairly dead from a grip standpoint.

theVcar

Im shopping also. I am eyeing the RE-11. Rode in autox with this guy Brian from BS and he stated Re-11 is great. A little more $$ but it may be worth. Getting prices on Monday

rustyguns

wtb-z

The RE11 would probably be a better street/autocross tire, and the XS is probably a better road course tire.

It will be hard to get enough heat into the XS without a few warmup laps. Although maybe in AZ....

taken19

Thank you for the data point. Looks like a solid choice for the money.

1stz51

Got 14 days outta them plus about 2000 on street. Now that I got a trailer hope to get a few more days outta them