it looks like these are factory 2004-2008 wheels.

are they 17s or 18s?

if they are an 18, my guess is this is a 285/70/18 tire.

what say ye?

 

I assume that truck is on a dealer lot for sale? Call the dealer and ask them to go read the size off the sidewall.

I don't know the exact year of that one, but the stock sizes on a 2005 FX4 are 255-70-17 and 275-65-18. It also looks like that truck may have a lift.

 

no, it is just a pic i found on the internet somewhere and the link for it went nowhere, so i think it probably was from a long time ago.

but yeah i agree it has a front lift and based on the foglights it's either a 04 or 05. and i have def seen that style of wheel before though and am leaning towards it being one that came in a 17 inch.

 

Those are 17's.

No clue on the size. That truck does have a small lift kit on it.