What Tire Pressure
Junior User
Joined: Nov 2000
Posts: 97
Likes: 0
From: Eastern Ontario
Flash get a grip, the firestone tires were junk, Ford installed goodyears same size same pressures on the same trucks and never had any problems. Only with certain firestones. The main problem was user underinflation (much less that 26psi cold) and overloading in very hot climates. Don't forget these tires had no UTOG rating on the sidewalls OEM. Replacement firestones were UTOG rate temperature "C" the lowest possible rating before rejection. I know as I purchased a replacement firestone before the recall. BTW there were atleast 3 tread patern variations depending which size you got. The size with the most problems was 235/75/15. With 45 or 50 psi in your tires I am glad they are on your truck. They must ride like steel wheels, good for the railway. I you want handling buy a Focus SVT!
Senior User
Joined: Jul 2004
Posts: 358
Likes: 0
From: Brisbane Australia
Firestone tyres ARE junk, I would never buy them. For the record I don't like Goodyear either.
I only run 50 psi on the highway when fully loaded, otherwise 40 or 45 is good.
It rides fine because the tyres are superior to the standard ones and I have much better shocks.
When I first got it, it had 30lbs in the tyres and standard shocks and it was dangerous.
What's wrong with improving the standard ride and handling?
Ok, so it would never compete with a Focus SVT, but I have a BMW for that and that's not the point anyway. I was after improvement and I got it.
I used to have a Mitsubishi Triton 4x2 one ton. It always rode fairly well for a one tonner.
I replaced the front shocks with Konis-better.
When the front tyres wore out (Dunlop SP Commercial) I replaced them with Yokahama one ton tyres. Because I was selling the truck, I put 40lbs in the front tyres instead of the usual 60 to improve the ride. 40lbs didn't feel right so after so messing around I ended up with 60lbs in front (max 75) and it rode better than with 40.
That was because the tyres were designed to run at higher psi.
I only run 50 psi on the highway when fully loaded, otherwise 40 or 45 is good.
It rides fine because the tyres are superior to the standard ones and I have much better shocks.
When I first got it, it had 30lbs in the tyres and standard shocks and it was dangerous.
What's wrong with improving the standard ride and handling?
Ok, so it would never compete with a Focus SVT, but I have a BMW for that and that's not the point anyway. I was after improvement and I got it.
I used to have a Mitsubishi Triton 4x2 one ton. It always rode fairly well for a one tonner.
I replaced the front shocks with Konis-better.
When the front tyres wore out (Dunlop SP Commercial) I replaced them with Yokahama one ton tyres. Because I was selling the truck, I put 40lbs in the front tyres instead of the usual 60 to improve the ride. 40lbs didn't feel right so after so messing around I ended up with 60lbs in front (max 75) and it rode better than with 40.
That was because the tyres were designed to run at higher psi.
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