Kumho 712's speed ratings?

[Burl Vibert]

Perhaps it has construction differences such as a wrap of (or spiral)
overlay over the belt package.  Could also be wraparound gum strips on
the belts, an additional extrusion of wedge compound, dual ply wraps,
etc.  Basically to the driver, they are stiffer.

Burl Vibert
1987 5kcstq
Kingston, Ontario


Todd Phenneger wrote:
> 
> Some tire companies do this.   But the V-rated Kumho's
> supposedly are a little softer sidewalls than the Z-rated but I
> cant confirm this.  Sometimes its a tread difference as well.
> Usually companies do this associated with a Tire Aspect ratio
> change though.   Wierd,
>   I always get the higher but sometimes maybe it doesnt matter.
> They are both sure to be great tires, happy cornering.
> l8r
>
> > 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?