Hello!

I have 2007 F150 XLT that I put 2007 FX4 rims on, with the accompanying Pirelli Scorpion tires. These Pirelli tires have always been terrible. When it rains the tires just spin.
If it snows, I do not drive the truck. I went to Kal Tire to replace the tires with the same size tires 275/55/R20. I asked for the Nokian WRG4 SUV tires. The techs informed me that my truck tire sticker says that I must use a tire pressure at 60PSI and that the Nokian tires only go to 44. But this tire pressure was for the 17 inch rims/tires that came with the XLT and not the FX4 rims/tires that I swapped them for. They wanted to sell me a cheaper tire, that was much thicker.

The stock FX4 tires are only rated for 44PSI as well. Are 04-08 F150 rim and tires interchangeable? Is it not safe for me to use FX4 rims and tires with different tires pressures?


I'd appreciate any help that can be offered. Kal Tire doesn't seem to know, my local dealership wants to "book an appointment".

Thanks

 

Most tire places only want to install what is on the placard on your vehicle in the door jamb for liability reasons.

However, if you take the rims/tires off and bring them to the shop, they will put on whatever you ask.

As far as tire pressures, you always follow what is on the tire! So if a tire says 44 PSI, don't go any higher than 44 PSI or you will run the risk of a blowout or damage to over inflation. Rims do not care about how much pressure is in a tire.

My best advice is to go online to say Tirerack.com and buy those Nokian WRG4 in 275/55/R20, YOU take the old rims/tires off the truck, and get a friend to take you down to the shop to swap tires. Then go back home and put them on your truck and be done with it.

 

Only problem with buying from Tire Rack is shipping cost.

You must have the HD Payload option if it came with 17's with 60 psi recommended.

 

Thanks ManualF150 - I kind of thought that they were going strictly by what they read on the placard. But one of the guys was really trying to sell it to me that it was a safety issue.

I'm not sure if there is HD Payload as I bought the trucked used already. But I do not haul a lot of stuff at all! Once in a while I'll move some furniture but I don't think I've ever had more than 300 pounds on the truck.

 

All you need to do is look up the VIN to see what the payload/axle package is. I betcha glc is correct.