I have a 05 KR 4x4. Was thinking of going from the 275/65/18 up to the 305/65/18. Was just wondering how far would that throw my speedometer off, if at all.

 

If you go to DiscountTire.com, there is a feature at the top called "Info Center", click there and go to Tire Calculator. From there you can enter your current size and the size you want to go to and choose your speedo speed and it will give you your actual speed. Let me know if that helps.

 

I'd say going from the 275 to the 305 would put you no more than 3 to 4mph off, if your speedo show's 60 you are going about 63 to 64mph. Just use Cajun math!

 

Thanks for the info. the discount tire wed site did help. It is about 3mph differance.

 

Here you go -

http://www.discounttire.com/dtcs/infoTireMath.dos