92comanche4x4 Posted January 12, 2008 Share Posted January 12, 2008 I put 31/10.5/15 on my mj it is stock other than the oversized tires how much would that throw my speedometer off? Link to comment Share on other sites More sharing options...
JeepcoMJ Posted January 12, 2008 Share Posted January 12, 2008 I put 31/10.5/15 on my mj it is stock other than the oversized tires how much would that throw my speedometer off? should be approximately 3mph lower than what you're going...that's what mine is. edit: your speedometer should read 3mph LOWER than the speed at which you are traveling at that given point in time just to clarify what I meant Link to comment Share on other sites More sharing options...
92comanche4x4 Posted January 12, 2008 Author Share Posted January 12, 2008 ok thanks Link to comment Share on other sites More sharing options...
akamcbird Posted January 12, 2008 Share Posted January 12, 2008 http://www.greatlakesxj.com/tech/tech_calcs.html#speedometer Link to comment Share on other sites More sharing options...
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