E Load Rated Tire Pressure
07-24-2015, 12:48 AM
#41
Who doesn't want a F150?
This thread is hilarious ... Until about a week ago, I was running 10-ply 275/65r20 Nitto Terra Grapplers on my 2014 FX4 ... I had the fronts at 42-43 psi, and the rears at about 39-40 psi ...
The truck rode more harsh than w/ the stock pirelli tires, but that's to be expected when going from a 3/4 ply to a 10 ply ... but the ride was NOT bad ... just a little more "sporty".
I never had any issues w/ the tires feeling like they were slipping on the wheels. In fact, they were solid as a rock on the stock 20" FX4 wheels ...
The tires were also barely showing any signs of wear after nearly 15K miles ...
The only reason I changed tires is because I really wanted the new Cooper STT Pro's, which I got in 295/60r20 ... I have those at 42 psi front and back right now ... they are 10 ply as well, and they ride great.
As for what's on the door sticker for tire pressure. That is NOT an "end all be all" number. That number is SPECIFIC TO THE TIRES THAT CAME ON THE TRUCK FROM THE FACTORY. As soon as you change to ANY different tire, all bets are off.
As for always running 10-ply tires at 80 psi (or max psi for whatever the tire says) ... that's ridiculous. Just like most P rated tires say "max pressure 44 psi" ... that doesn't mean run them at 44 all the time ... that just means do not go over 44 psi. Unloaded, those tires typically run best in the 35-38 psi range ... if you really load down the vehicle, you air the tires up to compensate for the extra weight ... that's all ... it's not rocket science.
Same goes for 60-80 psi rated 10 ply tires... those tires are made to be able to be aired to high pressures to counter the added weight when towing or hauling. But, on a lighter truck (like our F150's) ... airing down to about 40 psi is more than ok. They are not gonna slip, or be under-inflated and wear the edges too fast ...
The whole point of tire pressure is to find where the tire needs to be for whatever vehicle the tire is on. The exact same tire on two different vehicles might need to be at two different inflation factors, based soley on the weight of the vehicle and how it's being used.
Will more air in any given tire make it ride more firmly or more harsh? Probably ... but does that mean its improper to air to that higher pressure? or to a lower pressure? nope ...
Soooo much mis-information in this thread ...
The truck rode more harsh than w/ the stock pirelli tires, but that's to be expected when going from a 3/4 ply to a 10 ply ... but the ride was NOT bad ... just a little more "sporty".
I never had any issues w/ the tires feeling like they were slipping on the wheels. In fact, they were solid as a rock on the stock 20" FX4 wheels ...
The tires were also barely showing any signs of wear after nearly 15K miles ...
The only reason I changed tires is because I really wanted the new Cooper STT Pro's, which I got in 295/60r20 ... I have those at 42 psi front and back right now ... they are 10 ply as well, and they ride great.
As for what's on the door sticker for tire pressure. That is NOT an "end all be all" number. That number is SPECIFIC TO THE TIRES THAT CAME ON THE TRUCK FROM THE FACTORY. As soon as you change to ANY different tire, all bets are off.
As for always running 10-ply tires at 80 psi (or max psi for whatever the tire says) ... that's ridiculous. Just like most P rated tires say "max pressure 44 psi" ... that doesn't mean run them at 44 all the time ... that just means do not go over 44 psi. Unloaded, those tires typically run best in the 35-38 psi range ... if you really load down the vehicle, you air the tires up to compensate for the extra weight ... that's all ... it's not rocket science.
Same goes for 60-80 psi rated 10 ply tires... those tires are made to be able to be aired to high pressures to counter the added weight when towing or hauling. But, on a lighter truck (like our F150's) ... airing down to about 40 psi is more than ok. They are not gonna slip, or be under-inflated and wear the edges too fast ...
The whole point of tire pressure is to find where the tire needs to be for whatever vehicle the tire is on. The exact same tire on two different vehicles might need to be at two different inflation factors, based soley on the weight of the vehicle and how it's being used.
Will more air in any given tire make it ride more firmly or more harsh? Probably ... but does that mean its improper to air to that higher pressure? or to a lower pressure? nope ...
Soooo much mis-information in this thread ...
