NJ-GT

I bought these tires about 1 month ago. They have zero track time. I've used them on just 2 autocrosses. I wanted to compare them to the Kumho V710 for autocross. They won't heat up to optimum temperatures for AutoX, so my test expectations failed.

Specs:
(2) 24/64R18 - S7A (Softest Compound)
(2) 27/65R18 - S7A (Softest Compound)

These tires have ideal dimension for the street GT3. No ABS problems due to the the smaller on diameter rear tire. The GT3 Cup rear Michelin slick 27/68R18 (1.3" taller) doesn't work on the street GT3, due to the ABS going on ice mode and getting disabled.

I will post pictures later.

$850 including shipping.

Z06

I do not understand those numbers...how wide and how tall are they?

ltcjmramos

Can you convert this to the xxx/xx-18 (e.g., 235/40-18) format?

NJ-GT

Michelin Pilot SX - Slicks

24/64R18
Section Width: 252mm
Diameter: 643mm
DOT equivalent: 255/35R18

27/65R18
Section Width: 286mm
Diameter: 650mm
DOT equivalent: 285/30R18

The contact patch on both front and rear tires is wider than the DOT-R 265/35R18 - 295/30R18 Michelin Pilot Sport Cups. There are not grooves on these, so there is more rubber put to the ground even at the same width as a street tire. The rubber itself is way more sticky than anything found on a DOT Race compound tire.

We can't compare slicks to DOT-R by sizes. There are compounds, operating temperatures, tread width, total contact patch area, and other factors to be considered.

These tires are the same width as used on the 996/997 GT3 Cup cars from the factory. The difference is that the GT3 Cup uses a taller rear that doesn't work on the GT3 street car.

Not recommended for AutoX. They won't get up to operating temperature. On my second event on them they reached 120 degrees, when the operating range is 140 degrees to 212 degrees. They have two heat cycles.

Mike Buck

My bad, i converted based on tread width. Needed to pull the section widths from the Michelin website. Thought my numbers looked a little narrow

http://www.michelinsport.com/sport/f...ue=597&lang=EN

NJ's #'s are accurate

deleted my post

****EDIT

another question though. the michelin site doesn't list this S7A compound in the GT3 Cup rear size. what are your thoughts on using these S7A compound all around on a tracked(DE, race), street GT3? you've said they are not good for autox