lilman1717

I have a 04 XLT F-150 and I just got a 6 inch suspension lift and 3 inch body lift what is the biggest tire size I can go I want 18 inch rims but I don't know about the tire size. can anybody help me??

techrep

iTrader: (1)

How wide are the 18 inch wheels ??

lilman1717

20x9 I'm thinking that 38 is the biggest but I wanna make sure that I can't fit 40s.

techrep

iTrader: (1)

I think 38's would be a safe bet...what gears you running ??

lilman1717

just stock right now I was gonna see how I like running a bigger tire be4 I went and changed. but you think 38 would be the biggest?

zimmer0

iTrader: (1)

wouldnt go any bigger than that on 1/2ton. You'll more than likely need a wider 38, ~14" wide for it to look proportional and thats gunna be tough on your front end over time.

techrep

iTrader: (1)

and tough on the stock gears also...

lilman1717

aight man thanks for the help I appreciate it I just don't know wether to go 38 and change my gears or go 40 and change my gears what would you do?

zimmer0

iTrader: (1)

38s, gears, tune

CPT150

I tried to get 38s but there was an issue. It had to do with getting a tread that supported both off road and highway driving conditions. I couldnt find a tire that did both in the 38-39 range. All 38-39 were either very good for mudding, or off road or highway. I could however find it in 37s and below and 40 and above (Nitto and Toyo for instance). If you can find something that is rated for both, let me know. If you cant though, be careful what you get for off road tires will wear more quickly on highway