im not sure how to tell what size tire (ex. LT295/70R18E 129/126Q) is, in this kind or reading, what is the same size of a 33x12.50x18,

i hope yall know what im tryin to say had a hard to tryin to word what i wanted to say

 

295/70/18 is closer to 34" than 33".
Just google tire calculator. Once you find a calulator that is easy to use just start looking at tire sizes and putting them into the calculator. But remember once you have the tires installed on the truck you will loose a little height.

 

http://www.1010tires.com/tiresizecalculator.asp

305/65/18 or 325/60/18 will get you close

 

A 33x12.50-18 is a 305/60-18 metric size. Other close sizes are 325/60-18 (33x13.00) and 305/65-18 (34x12.50).

 

would a 34x12.50 rub on a 04-08 f150 on a 4.5 in bs rim i know a 33 would be really close and u have to trim the valence but what about a 34

 

Depends on the width. I think you would be fine with something like a 9 inch wheel with 5 or 5.5 inches of BS but I think you would have to do some trimming if it's a 9 with 4.5 inches of BS.

 

is 11 offset the same as 4.5in bs??