good link for new wheel speedometer difference
 

I'm not sure if this has been posted before but this is a good link to see how your new wheel may affect your speedometer readings. I don't know how accurate it is but check it out. Just put in the stock tire size and your current or future tire size and it should tell you. :thumbup:

http://www.tacomaworld.com/forum/tir...5r18-235-35r18