tire size help

stock is 275-40-17 i have 225-60-16 on now how much of a tire height diff am i looking at ?? there was a website once but i cant find it… thanks

.9" difference in diameter…

your speedo will read 3.8% too slow

http://www.miata.net/garage/tirecalc.html

thanks thats the site i was looking for !

depends on wheel size also!

NM Shaler found it.

-TJ

well just to get an idea of how off my mph is when im on the highway its cool
btw they are S rated !!! than means stay below what mph ? ive gotten to 110 or so but i dont think that was smart

its easy for me to set my mph on my speedo, all i gotta do is hook up my scan tool and it shows my mph then take my lego dash apart and pull the needle and reset it, takes 15 mins for me :slight_smile: