In article >,
Arye > wrote:

> On 9/15/2010 3:16 AM, Don Q wrote:
> > On 2010-09-09 20:50:12 -0400, Arye > said:
> >
> >> My thinking is to go up one size (from 185/60R14 to 195/60R14), to
> >> compensate for the slightly too-slow speedometer
> >
> > Is there a typo here?
> >
> > I'm no expert but my understanding is that 185 and 195 indicate the
> > tread width in millimeters. In other words, you are getting a tire that
> > is about 2/5 of an inch wider. This may provide slightly better grip in
> > cornering, everything else being equal. (Tread pattern, compound
> > hardness, tire pressure, slip angles...)
> >
> > But since they are both 60 profile I think the diameter will be exactly
> > the same, hence the speedo/odo will not be affected.
> >
> > cheers
> >
> > Don
> >
> It's true that that 185 and 195 indicate the tread width. However, the
> 60 indicates the ratio of diameter to width, so it goes up proportionally.

1. 185 and 195 indicate the *section* width, no the tread width.

2. The 60 indicates the ratio of the section height to section width as
a percentage


>
> But there WAS a typo the I was looking for good thread-wear, not good
> thread-ware...
>
> Thanks!

--
Alan Baker
Vancouver, British Columbia
<http://gallery.me.com/alangbaker/100008/DSCF0162/web.jpg>