P tires to LT tires on an 07 ford expedition el?

[zlock24]

So I'm wonder if you can go from passenger tires to light truck tires using the same rims? Or would it be like trying to put R1 s on R4 rims? Haha

 

[2458n]

Do not know for sure but I do this all the time with home made car trailers etc. The handling may change with something with steering and suspension under it. I do have a hay rake with p series and whitewalls.

 

[RickB]

If the tires are the same size, the same rims are used.

 

[qstott]

No problem. The letter designation signifies the load rating more than anything else. P tires are "passenger" with a 4 or 6 ply rating. LT tires (light truck) are 6, 8 or 10 ply rated.
Stiffer sidewalls, more capacity, but possibly harsher ride. P rated tires are used to give a better ride on a truck. LT tires have a higher min. and max. inflation rate. If a nice ride is important, you may lose some of it. It's not wise to run LT tires at the lower inflation weights of P tires. I did have a customer than put P tires on his 3/4 ton truck because they were cheaper. His low tire pressure light now stays on all the time. He can't safely inflate the P tires to enough pressure to put the light out. If you use LT tires you shouldn't have the tire pressure light problem. But you run the risk of having underinflated LT tires without knowing it.

 

[Diamondpilot]

No problems as long as you stay around the same size.

Chris

 

[thatguy]

You also need to check the weight ratings on the P tires to make sure they can handle the weight of the expedition - its certainly not a lightweight vehicle.. IIRC- when you use a P tire on a 'truck' type vehicle you loose some of their rated weight capacity..

Any particular reason you want to go with a P tire?

Brian

 

[thatguy]

here is what I found on TireRack.com regarding the use of P tires on heavier trucks/suvs - it looks like you loose ~10% of the P tires rated capacity when used this way

You certainly dont want to cut any safety corners by going with a P tire.. If you go to tirerack and put in your tire size it will list both P and LT tires - then in the specs it lists the weight capacity and speed ratings..


Tire Tech Information - Load Reduction of Euro- and P-Metric Tires on Light Trucks

Brian

 

[RickB]

here is what I found on TireRack.com regarding the use of P tires on heavier trucks/suvs - it looks like you loose ~10% of the P tires rated capacity when used this way

You certainly dont want to cut any safety corners by going with a P tire.. If you go to tirerack and put in your tire size it will list both P and LT tires - then in the specs it lists the weight capacity and speed ratings..


Tire Tech Information - Load Reduction of Euro- and P-Metric Tires on Light Trucks

Brian

The OP is swapping the OTHER WAY!

 

[Diamondpilot]

The OP is swapping the OTHER WAY!

Yes guys, it clearly states he wants to go FROM p tires TO lt tires.

Chris

 

[Marcellin]

There is no problem but it won't give you more GVWR in regards to the DOT. Also a problem I ran in to once, just doing it the other way around (going from LT to P) is that if you have TPMS (pressure sensors mounted inside the tire), then your TPMS lamp will always stay on. I've tried reprogramming the tire pressure module with no success. I went to the dealer, and even the technicien was unable to modify it in the PCM. The pressure difference was to big, going from 80 psi. down to 35 psi. So I just covered the lamp in the dashboard with a piece of tape.
But maybe your lucky and don't have this annoing option.
Hope this helps !