hey just wondering what the biggest tires I could go with 17 inch rims and no lift on a JK 4 door. Just got the thing and dont know if I want to lift it yet.

 

https://www.jk-forum.com/forums/modified-jk-tech-2/modified-tech-faq-answers-questions-every-newbie-has-18617/

 

There is a ton of guys on this forum running 33's with no lift. I dont know what that number would break down as, maybe like a 290/75/17 or something like that.

 

32" if you want the dealer to be able to recalibrate your speedometer.

34" I believe but you will need an aftermarket programmerto adjust the speedometer.

 

Thanks for the responses. Just bought my JK about a week ago and am stoked about getting started on the personalization of it. I've had a few tell me that I can only go with a 265 65 17 without at least a small lift, good to know that I should be able to go a little bigger.

 

285 or 305 as the first number on the tire is equivalent to a 33 fyi.

 

Here is an easy to use formula for calculating tire size form metric to inches

Tires converstion equation..PXXX/YYRZZ equals (((XXX/25.6)*0.YY)*2)+ZZ
eg, p255/75R17 = (255/25.6)*.75)*2)+17=31.94

A BB or budget boost is very inexpensive and can allow a few more options for you when it comes to tire size.

Welcome to the club!

 

Thanks Tambil,
That does clear up some confusion. It seems like tire sizes should be a little bit easier to understand.