Kumho 712's speed ratings?

[Luke Rickert]

I called a local tire shop yesterday and had them order a set of kumho
712's for my 4kq (with 15's). Anyway they asked what speed rating I
wanted, I said the lower would be fine since my car can't get to 130,
let alone 180 or whatever the high rating was. Now I have started to
wonder, what is the deal with the same model and size of a tire coming
in two different speed ratings for very similar prices? Does anyone have
any idea what this is about? Is there any reason I should call them back
and get the high rated tire? 

thanks

Luke 




-- 
Luke Rickert
www.engr.orst.edu/~rickert