I have a 99 F250. It came with LT245/75 4 16's tires and rims. someone is offering me a new set of tires and rims that are bigger: P275/65R18. I haul sand in the truck sometimes as much as a couple of tons. Is there any reason I can't put the bigger rims and trucks on my truck. what if any would the effect be? thanks, Jeff

Jeff,
Your speedometer will be off because the differance in the height of the tires.If the load rating is just as good or better than the old ones I don't see any problems.

I'm in need of some info, keep getting conflicting direction on tire pressure.

2005 Ford F250 FX4 owner, pulls a Hawk 2H gooseneck with dressing room. I have been inflating to 75psi cold as instructed on the truck door sticker but:

- Local trailer god suggests 80psi for hauling
- Local Ford dealer says inflate to "over 55" when not hauling

What's the best rating for both these scenarios?

quote:

Originally posted by Oxfarm:
I'm in need of some info, keep getting conflicting direction on tire pressure.

2005 Ford F250 FX4 owner, pulls a Hawk 2H gooseneck with dressing room. I have been inflating to 75psi cold as instructed on the truck door sticker but:

- Local trailer god suggests 80psi for hauling
- Local Ford dealer says inflate to "over 55" when not hauling

What's the best rating for both these scenarios?

I would inflate to 75 PSI as the door sticker says. It's the best general compromise. Then adjust for your use. If the tires are wearing more in the center, reduce the pressure by 5 psi. If wearing on the edges, increase by the same. Also note: The wear must be even on both tires on the axle or you have a wheel alignment issue not a tire pressure issue.

What does the tire have on the side wall for pressures?

Thanks for the suggestions. What got me scratching my head - again! - this morning was the dealer's "over 50." I'm sorry, but for something as dear as this rig that I'm going to get one shot at owning, I want to be a bit more precise. Also want to be as safe as possible.

The tire side wall says 80psi cold, 1450kgs for a single axle. The tire is a BF Goodrich Rugged Trail T/A.

BTW, I'm thrilled with how the truck feels and pulls in general.