frafoss

Just bought a set of 235/35/19 and 305/30/19 Michelin Cup tyres. Can sombody reccommend tyre pressure for street? Since I don't have the GT3 the I don't know these.

Also recommended pressures for track, both cold and hot.

normank

GT3 Label says: 29 F 33 R

007GT3

take them to your local p-dealer and ask them to fill them with nitrogen while you are at it...they can check the specs.

frafoss

Are this cold for street?

frafoss

What are the advantages with nitrogen?

deutschmick

Compressed nitrogen does not carry water vapor as compressed air will. Recommended pressures are cold, for street use.

Moogle

yes those are cold temps. I do 30F 32R

AW

you want to be in a [30-32] psi range hot. If you go over or below you'll ruin them. This is why it is much better to use nitrogen since the expansion is predictable. I usually start around 22-23 cold.

AW

PS: I'm assuming you are talking about Michelin Cup Slicks, not Pilot sport cups.

nkhalidi

I have the same setup as you, frafoss (GT3 tires on a non-GT3) and I've found that 34-35 hot all round works well. I start around 27 cold. After the track day, it's a good idea to air back up to recommended pressures (37/44 cold) lest TPMS go nuts.

frafoss

Is 37/44 cold correct??? Thats more than recommended for Michelin PS2, and what I have read is that the Cup tyre should have less pressure because of the compound and stiffer tyre walls.

You says 34-35 hot all round works well. Have you tried with less pressure? Most of the other guys here recommend lower.