I'm wanting to lower my truck 3/5 and get some 22" KMC Slides that have 38mm of offset and 6.73" of backspacing. So can i run the 305/45s or will i need 305/40s? Thanks for any help.

 

I'd go with the 305/40-22's.

 

Thanks wandell, will i have any problems on gravel roads or potholes with the shorter sidewall?

 

Id think you'd be ok from what I've seen. I think its miltv who has like 4/6 with that tire on a 2wd. I went with a 305 40 23 bout a month ago and you'll be ok but there is definitly less rubber to absorb bumps. You'll feel it.

 

Post your questions in the Street Scene forum.
Lot of lowered trucks there.

https://www.f150online.com/forums/street-scene-81/