Yeah, I just like to leave a little room for "HEAT" as I'm in the deep south and it's not uncommon for me to do a trip up to the farm (320 miles, mostly interstate) in 100* temps, if I was up in NY I prolly wouldn't worry about it. But yeah, the Terra Grapps on my Jeep are great for pavement and these awful red clay roads in south Georgia that can be downright treacherous when it rains. Which is another reason I'll run 'em about 80% instead of max, just a bit more footprint in the muck.

BTW, where abouts in Ulster are you? I grew up in Orange County, did a LOT of hunting/fishing in Ulster & Sullivan Counties as a teen...

 

Lived in New Paltz, NY. Now I'm in OC, Newburgh.

Well since my Silverado was a 2500 and the General tires I bought the truck with, ran 55psi minimum and the dealer had them at around 80 (if I can remember that far back)

I bought my new MB wheels and Grapps from Discount Tire and the guy said you'll love these tires and ride. Said the load range was perfect for what I used my truck (daily commuter only....quad or motorcycle in the back only). So it's somewhat obvious why I noticed and big improvement in bump comfort.


Funny thing was when I replaced the Grapps I bought some Goodyear Wrangler (same B load range) tires on tire rack. Brought it to a local tire shop where they work outside and Nascar style (4 guys remove wheels ) Well one guy read the door sticker and told the boss. Needless to say, they never installed them. Said I needed E rated tires. I never went back and just went somewhere else. Never a problem and sold the truck after she hit 100k miles.

 

I grew up in the 'burgh, lived there till I graduated OCCC & moved to Georgia to finish school in '91. Only been back three times since. Man has it changed in 20 years!!!

 

Tell me about it ! I moved up here from Pearl River in 1990 and it's changed quite a bit...er...bunch !

 

I have the 275/60R20 Cooper Zeons and try to keep them at ~40psi, but they are constantly getting low with the temperature swings we've had here in Houston lately. I have to fill them back up every two weeks or so.

 

With larger wheels you have less "play" due to the lack of sidewall. It's very important to check/adjust air pressure more often with larger wheels...

 

So i just looked up the specs online (tirerack.com) for my Firestone Transforce HT tires, stock size 265/70/17 with load range E and it says maximum cold inflation is 80PSI, i'm running at 35PSI per the door placard. Based on HammerZ71, then i'm way too low, i should be around 60PSI (75%)?

 

Running that low you'll see improved traction but tire wear will be pretty fast and you'll lose a good bit of fuel economy. Loys of guys run 'E" tires low to soften the ride up as tires that stiff can ride very rough. I would never recommend an "E" tire on a half ton truck unless you tow/haul a lot or need the thicker sidewall for off-road. Better to get a "C" or "D" tire and run them at 80% capacity.

The other problem with running an "E" tire is that the sh*tty stock shocks don't handle them well, so again the band-aid is too run the tires low to help soften the ride. I'd bring the tires up to at least 50 PSI and see if what it feels like, undoubtedly it will ride more like a truck - but you'll probably get 25% longer life out of the tires than at 35 PSI. I'd also recommend a heavier duty shock with those tires...

 

I do tow a lot being a lawn guy, but should i still inflate to say 60PSI

 

I would and if it's too stiff back it on down to 50 PSI. A tire that is run too low for it's rating will cause a few problems over time. When a tire is under inflated, there is too much contact with the road by the outer treads, which wear prematurely. Also, due to increased friction with the road, there is more heat generated which will not only cause faster wear but can cause an issue with the brakes and hubs which will have you replacing them sooner as well.
Outer tire wear will also cause front end vibration problems, especially when turning, this results in more wear on ball joints, tie rods and the rack...

The 35 PSI rating on the door assumes you are running either a "P" tire (passenger car - which many 1500s ship with) or a "C" range tire which is usually happiest at 35 PSI, but not an LT tire in a "D" or "E" range...