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**MikeB** · 10-12-2019, 07:59 AM

Every vehicle I've owned with 18"-20" wheels and 45-50 series tires called for 32-35 psi cold. And that was anywhere from a 3600 lb. Mustang to a 5200 lb. F150.

I'd start with 34 psi and then have your customer use a tread depth gauge to measure across the tread every 1000 miles or so.

10-12-2019, 07:59 AM	#14
MikeB Senior Member Join Date: Jul 2000 Location: North Texas Posts: 3,423	Re: 20 Inch Tire Pressures Every vehicle I've owned with 18"-20" wheels and 45-50 series tires called for 32-35 psi cold. And that was anywhere from a 3600 lb. Mustang to a 5200 lb. F150. I'd start with 34 psi and then have your customer use a tread depth gauge to measure across the tread every 1000 miles or so. __________________ Mike 1969 C10 LWB -- owned for 34 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 23 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then!