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.

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

Thanks!