[mo_focus]

take one wheel out and try the new wheel before you go spending more $ on the new tire!

Once the rim is on, make sure its got the require clerances for that. IF you are happy with it then start searching for a new tire that will fit.

16X10 means its got to be 16 in tires with 10 width. So i would be looking around 255-285 maybe even more. Also use this site to see what tire you can use that will be ok with your speedo as well. With trucks you have to be careful, bc if you are way out then your tranny shift points need to be changed as well.

http://www.miata.net/garage/tirecalc.html

original F-150 has 3 sizes, which one did you have?

1- 235/70-16
2- 255/70-16
3- 265/70-17

16x7", 5 lug on 135 mm, 14mm inset, was the original for 98 F-150, your new rim is 16X 10mmmmm i think you might be OK, as long as your offset is ok.