Here is an online tire claculator that will give you a rough estimate of the
difference:
http://www.miata.net/garage/tirecalc.html
> In a message dated 1/4/2006 7:06:17 A.M. Mountain Standard Time,
> jengfehr@ford.com writes:
>
> The original 145 70 tires are 21" tall. The
> common replacement 155 80 tires are 22.76" tall, thus "slowing down "
> your final drive ratio. Does anyone have any gut feel on what this does?
> Any data?
>
> John Engfehr
>
>
>
> Poor man's overdrive?
>
> Robert Houston
> Texan in New Mexico
> 73 Midget
> 63 TR4
> 74.5 MGBGT
|