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Old 03-12-2002, 01:26 AM   #1
Cosworth
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'00 RC51, '08 KTM

Default Street/Auto-X tire pressures for 225/40/18 tires?

I should have my 225/40/18 SO-3's here any day now and was wondering what tire pressures some of you with 18" tires run on both the street and at the track (if you partake in such activities)? I tried a search, but "18" is not searchable and combinations of "225/40/18 tire pressure" don't yield much. The factory placard also doesn't seem to make much of a mention of this particular size either!
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Old 03-12-2002, 10:41 AM   #2
Cosworth
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I know there a a lot of you running P1's at least, what tire pressures are you running?
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Old 03-12-2002, 12:00 PM   #3
speedbuggy67
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Hey man, can't wait to see them, PM weasel 555 he has P1 in 18's in our area. He will be happy to tell you. I believe I have heard guys keep them at 36 front 34 rear, but I would make sure they stay hard as the harder they are the harder it is to bend them.

Scott
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Old 03-12-2002, 02:12 PM   #4
Cosworth
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Scott,
Are you going to be around this weekend? I should have this stuff done by this weekend for sure! I might want to go up the D&D this Sat. night to meet an old friend of mine... Maybe we can meet up Sat. night at D&D? I'll need direx though....

Jon.
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Old 03-12-2002, 02:23 PM   #5
NightmareOnSubySt
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Excuse me for budding in but if you're interested, I was running 44lbs front and 40lbs rear at 2 autoxs on 18's. Max cold pressure on these tires is 51lbs. I may have been able to lower pressures but did not want to risk excessive rollover.
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Old 03-12-2002, 02:50 PM   #6
Cosworth
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Nightmare: thanks for the info! May i ask what pressure you run everyday on the street?
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Old 03-12-2002, 03:09 PM   #7
jeffg
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I run 225/40-18's
street pressure 40/40 psi
autoX 44/42 psi

jeff
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