I have a 3 inch lift from rough country, I currently have stock tires on my 2002 f150 screw 2wd. I need help on finding out what is the biggest size tire I can fit. Also, how big can I go without having to regear?

 

This has been talked about and explained ad nauseam but 33's and 35's are standard sizes with a lift or level. You don't need to re-gear but your transmission will thank you the further you separate your trans gears and tire size.

I have 35's and 4.56's which is on the steep side of a comparative ratio from stock 31's and 3.55's. I could have went 4.10's but I like the little little extra off the line when I tow.

If you go 33's, 4.10's would be a good choice since going from 3.55 to 3.73 is too inconsequential to be satisfied.


I'd direct you to the tire and lift sticky for further advice and pictures. I'm on my phone so I don't have a link.