Does anyone know the backspacing of my stock 16" wheels? [2003 F150 Sport 4X4]

 

The stock backspacing is 4 1/2 inches.

 

Thanks for you prompt reply.
I've been lurking this site for a while and want to change wheels/tires on my truck keeping close to the same overall height while increasing the section size.
From this thread I've learned that my P255/70R16 tires are 30"x10".
Some combinations I've come up with from just under 30" to just over 30" [realizing of course that wider wheels are needed] are:
P285/60R/16
P275/60R/17
stock size
P305/50R/18
P275/65R/16
P305/60R/16
P285/60R/17
Now to start shopping!

 

You should be looking at LT rated tires, not P rated.

P will work, but they arent rated for towing as much, and it's probably going to limit your choices.

 

Thanks for the replies!

 

The stock tires as listed on the sidewall: M+S P255/70R16 109S
109=load rating of 2,271lbs/S=speed rating of 112mph

I'm not too concerned about the LT rating as I don't tow a lot but I would like to get a heavier load rating and higher speed rating. Looks so far like another set of wheels for spring/summer/fall and the stock set for winter.

This whole exercise is because I'm very close to ordering a Turbo system for my truck and don't want to waste my present tires that by the way work great in snow and on wet pavement.