SLC Tire Pressure settings

Blair

Supporter
Looking for some input on tire pressure for normal street and highway driving. Not performance based. 275/30/19 Front 335/25/20 Rear thx
 
on my race cars (~1,500lbs to 2,400lbs) i use 30psi

on my oem cars (lambos, vipers, corvettes, mustangs, etc.) i use 34psi

yeaaaars ago i used to use the rule 10psi per 1,000pds, so on my sl-c i'd use like 22-24psi, but that's stupid for the street as it leaves minimal cushion room if something happens.
 

Ian Anderson

Lifetime Supporter
For my GT40 which was 95% Road use
Front 22 psi rear 26 psi was where I ended up.

I tried at 28 and 30 but it was then running only on the center portion of the tread.

David Morton (RIP) also told me once that the aquaplane number in mph is calculated at 9 times the square root of tyre psi. So when running on lower pressures be aware of puddles
 
Ditto what Alex said, low pressures open you up to a pothole bending/cracking a rim and other nasty damage. I'd not go below 28f/30r. I tend to run 34/36 but also high speed stuff.
 

Howard Jones

Supporter
I run My SLC on track with slicks at 28PSI all around HOT. I can tell the diffenence of 1 PSI. Low F the front wants to push. High R the rear gets loose. 3 PSI the wrong way and the cars feel like it either has flats or I got into someones oil.
 
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