Al N. Posted December 29, 2006 Share Posted December 29, 2006 So the other day I finally took Orange out for a spin with my younger daughter and we stopped to put some air in the tires. For starters, what are people running as typical F/R pressures for the 15" CR500s? (I put in 40 all around...44 is the limit printed on the tire). Also, can anyone guess what the Treadwear rating is? I was shocked, shocked I say, to find out that they are UTOQ 20!!! I don't think I've ever had a tire that was under 240. Link to comment Share on other sites More sharing options...
bball7754 Posted December 29, 2006 Share Posted December 29, 2006 From what I've read on Blatchat, 20 psi and lower is "normal" for a Seven. I usually run around 18 - 20 psi (with the infamous Michelin Pilots aka "pileups"). Steve Link to comment Share on other sites More sharing options...
Al N. Posted December 29, 2006 Author Share Posted December 29, 2006 Even on the CR500s, hunh? (I thought the ACB10s ran that way.) Wow. I guess it's got pretty stiff sidewalls. Link to comment Share on other sites More sharing options...
jfgw Posted December 29, 2006 Share Posted December 29, 2006 I run 16-18psi on 13" Hoosier R6's and they are treadware 40.... Link to comment Share on other sites More sharing options...
pksurveyor Posted December 29, 2006 Share Posted December 29, 2006 I use 18 psi on my SV. Caterham recommends 16 psi.pksurveyor2006-12-29 09:27:47 Link to comment Share on other sites More sharing options...
slngsht Posted December 29, 2006 Share Posted December 29, 2006 40 is way too high. you'll get much more grip at lower pressures. I'd say play with it a little, starting at 25, and see how you like it. With a car like yours, it'll probably end up being lower than 25. The best way is to take her to autox or skid pad with a tire temp gauge http://www.usa7s.com/aspnetforum/images/emoticons/smile5.gif Link to comment Share on other sites More sharing options...
stevet Posted December 29, 2006 Share Posted December 29, 2006 40 is too high. I'm at 20 psi on 14" rims (recommended by Caterham). Folks with the same tire/wheel set up as mine recommend anything from 15 to 20 psi. Link to comment Share on other sites More sharing options...
Al N. Posted December 29, 2006 Author Share Posted December 29, 2006 Gosh, I feel like such a rube now! I am immediately going home to let some air out! Happy New Year all. Link to comment Share on other sites More sharing options...
Boxologist Posted December 29, 2006 Share Posted December 29, 2006 i run 18-21 psi on my avon zr1s. u don't ned the high psi in our tyres becaus ethe car is so light. i run just under 40psi on my subarus, and they are 2.5x the weight. Link to comment Share on other sites More sharing options...
stevet Posted December 29, 2006 Share Posted December 29, 2006 didn't mean to rub in in, Al, just wanted to get to 100 posts http://www.usa7s.com/aspnetforum/images/emoticons/hurray.gif Link to comment Share on other sites More sharing options...
solder_guy Posted December 30, 2006 Share Posted December 30, 2006 Thanks for the info! I had no idea that the PSI was that low either! http://www.usa7s.com/aspnetforum/images/emoticons/confused5.gif Rob Mitchell solder_guy2006-12-30 07:37:31 Link to comment Share on other sites More sharing options...
yellowss7 Posted December 31, 2006 Share Posted December 31, 2006 Al, I run 13 inch CR500's at 18 pounds front and back. For autoxing, I run 12 pounds in the Hoosier slicks. Link to comment Share on other sites More sharing options...
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