Air Pressure with new tires - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cab4word67 · 07-13-2021, 07:06 PM

I have a 67 C10 step side with new 20s all the way around. Is there a range to start with for optimum air pressure. This is what I am running now

255/35R20 on 9.5 rims 40PSI FT Tire max is 1660 lb @49PSI
275/40R20 0n 9.5 rims 35PSI RR Tire max is 2049 lb @49PSI

I had the truck weighed once back when it had a lift kit and it was 5000 lbs
Im thinking 3000 lbs in ft with the SBC, the rest is in the rear. What do you all run for PSI?

jimijam00 · 07-13-2021, 07:22 PM

Do the chalk test

07-13-2021, 07:06 PM	#1
cab4word67 Registered User Join Date: Sep 2020 Location: portland oregon Posts: 184	Air Pressure with new tires I have a 67 C10 step side with new 20s all the way around. Is there a range to start with for optimum air pressure. This is what I am running now 255/35R20 on 9.5 rims 40PSI FT Tire max is 1660 lb @49PSI 275/40R20 0n 9.5 rims 35PSI RR Tire max is 2049 lb @49PSI I had the truck weighed once back when it had a lift kit and it was 5000 lbs Im thinking 3000 lbs in ft with the SBC, the rest is in the rear. What do you all run for PSI?

07-13-2021, 07:22 PM	#2
jimijam00 Registered User Join Date: Apr 2009 Location: PNW Posts: 553	Re: Air Pressure with new tires Do the chalk test



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