What tire pressure for street use with flotation tires?

[ghunt81]

Those of you that have 31x10.50's, 32x11.50's or 33x12.50's...what kind of tire pressure are you running on the street?

Never had a vehicle with tires like this, my old F250 had 10-ply tires that called for something like 80 psi , just wondering what's the best to put these at for best ride and wear?

 

[JoshT]

The FX4 LII came with 31x10.5-15 stock. IIRC ford calls for 32 psi on them just like they do on all other Rangers.

For best ride and wear you really need to go by the tire manufacturer's load tables, and do some math for the weight of your truck. On the 32x11.5 Falken Wild Peaks I have on my 99 the load tables put PSI somewhere around 25 or 28 PSI. The ride was improved at that pressure, but the handling and gas mileage suffered. Can't say about the wear as I didn't run at that pressure long enough. I ended up putting them back at 32 PSI. Given the limited mileage I put on the truck each year, I will take the hit in tread life.

 

[jeremysdad]

Falken Wild Peak At's, as well...33 front, 30 rear. Seems to be a good balance between handling and treadwear. Lower psi in the rear if not loaded...hauling trailer, bed loaded, add a couple pounds.

 

[SenorNoob]

I've found 32-35 works good enough for every (admittedly stock-like) combination I've ever seen.

 

[4x4junkie]

The FX4 LII came with 31x10.5-15 stock. IIRC ford calls for 32 psi on them just like they do on all other Rangers.

For best ride and wear you really need to go by the tire manufacturer's load tables, and do some math for the weight of your truck. On the 32x11.5 Falken Wild Peaks I have on my 99 the load tables put PSI somewhere around 25 or 28 PSI. The ride was improved at that pressure, but the handling and gas mileage suffered. Can't say about the wear as I didn't run at that pressure long enough. I ended up putting them back at 32 PSI. Given the limited mileage I put on the truck each year, I will take the hit in tread life.

Your tread life should actually be better with the higher pressure (less rolling resistance = reduced tread wear), it just won't wear quite as evenly is all (proper rotation should help reduce any unevenness).

When I had 31s on my Ranger, I too ran 35 front, 30 rear (bumping the rear up to 35-40 if hauling a heavy load). I have 33s now so I run the rears a couple PSI lower when unloaded (front still at 35).