i just got my s2k back to the east coast and haven't played with it all summer. i've forgotten what tire pressures are recommended for street use and what to drop them to for track use. they are 255's all around. with all the different tire pressures i run on sport bikes on race tracks, dirt bikes in the woods, i've forgotten what these numbers are.

 

On the street it doesn't matter too much. I typically inflate to 45 cold for slightly better fuel mileage and to make the tires feel a little better/more responsive. Im sure you will get a bunch of different answers though... some people will read the sticker that says 32psi on the door jam and

Track pressures depend. What does your alignment look like? Since you are using a 255 on a 9.5 you can run slightly lower pressures than the same tire on a 9" wheel. Typically for EHP street tires 36-38psi HOT is a good place to start, then drop from there. If you have less than -2 or so degrees of camber you may want to start pressures closer to 38-40psi HOT.

 

 

Street: ~32 cold
Track: ~38 hot (puts me at about 30 front, 28 rear cold). Dependent on specific tires and car setup...

I don't see any point to running more than 36 cold on the street. Rolling resistance increases rapidly below 26-28 psi, but doesn't decrease much with inflation pressures above 34-36. If you need to run 45 to make the car feel responsive, you got the wrong tires! Otherwise generally agree w/Misencik.

 

thanks for the info!

 

FYI FWIW, Advan (at least for the AD08R) recommends 32-36 psi HOT on track. BYP racing ran them at 30 psi hot. I found that they performed better towards the lower end (I shot for 32 psi hot).

This in contrast to, for example, RS3 which I do like at 36 psi hot.

 

AD08s have a VERY stiff sidewall...I'd say 36 hot max...go 30 cold

 

awesome, thanks for the updates!

 

For the track tire pressure depends on the car and how the alignment is set up. The driver, the track and the temps at the track will have a lot to do with it. For better handling street a couple past stock is good. I also think 45 is way too high.

 

more good info