I recently put a new set of Nitto Terra Grapplers on my 02 Ram 1500. The size is P285/70/17. I went with P rated tires because I dont haul anything to require a D or E range tire, and frankly thats what the truck came with.
My problem is that these tires have a max PSI of 35. The door placard suggests 35 PSI. My issue is running these tires at max psi, temp flucuations, and because the tires have a higher load capacity at 35 then the ones I took off had at 44 psi concerns me about wearing the centers out. The tires I took off were from Firestones bottom shelf (Peerless Widetrack Baja H/T) and had a max weight/ psi of 2535 at 44 psi, the Terra Grapplers are 2833 at 35 psi, thus my concern. I ran the Widetracks at 40 psi and they wore as even as I could ask and with 42,000 miles on them still had 6/32 (which is half) of tread left and i now in service on a co workers truck.
I called Nitto and they looked up what Dodge puts on the placard and told me to run it at that PSI totally ignoring the concerns I had about the load capacity and over pressurizing the tires once they heat up. Is there a chart, or any expert advice that I can use as a guide, maybe a weight to PSI conversion or something. Thanks in advance.
My problem is that these tires have a max PSI of 35. The door placard suggests 35 PSI. My issue is running these tires at max psi, temp flucuations, and because the tires have a higher load capacity at 35 then the ones I took off had at 44 psi concerns me about wearing the centers out. The tires I took off were from Firestones bottom shelf (Peerless Widetrack Baja H/T) and had a max weight/ psi of 2535 at 44 psi, the Terra Grapplers are 2833 at 35 psi, thus my concern. I ran the Widetracks at 40 psi and they wore as even as I could ask and with 42,000 miles on them still had 6/32 (which is half) of tread left and i now in service on a co workers truck.
I called Nitto and they looked up what Dodge puts on the placard and told me to run it at that PSI totally ignoring the concerns I had about the load capacity and over pressurizing the tires once they heat up. Is there a chart, or any expert advice that I can use as a guide, maybe a weight to PSI conversion or something. Thanks in advance.