Tyler.172

The 35s shouldn't be too bad in general I would put 4.10 for 35s a7x is they guy to talk to I learned about gearing size with tire size from him but i think thats what you want to run cuz with the 4.10s you get mpg and power back that you lost by throwing 35s on

twilliams9

Usually the rule for 35's is 4.56 gears. Thats what i did and im glad i went bigger! I get 12mpg in the city right now.

7700SCREW

I guess your not!! Lol

A7X

Well not so much a rule as what you want to do with the truck...
A good rule is to use this equation...
stock gear ratio x new tire size / old tire size...
Say
3.55x35/31= 4.00

So a 4.10 set will put him just above where he was stock in RPMs... Good for daily driving

Want a bit more pep, or want to take it offroad and not do much highway? Yeah you can throw 4.56s in... All about preference

4.10s would put my truck back to stock range and I have 39s... But I came from a 3.31 ratio...

I chose to use the 3.55 ratio in my equation because it was more desirable with what I wanna do with the truck at this time...

It's all about what you want to do with it...

fordtrucknut

37's or 38's with a 5:13 ratio thats my future set up lol that gives me a crawl ratio in granny low(6.69) and low transfer(2.61) of 89.5 to 1 lol i'll beable to scale the empire state building. lol
and a top high range speed of 64 mph at 3000 rpm.

by the way i'm running a crawl speed of 61 right now with my 3.55's and 35" tires.