On Mon, 8 May 2017 06:15:47 -0500, Dean Hoffman
wrote:

On 5/8/17 3:16 AM, Micky wrote:
As I said before, my rental has more tread than the wear bars, but not
too much more.

But... If it never snows and it never rains does it matter how much
tread the tires have?

Don't race cars use slicks, for better traction?

Nails and such on the road.
Sand on the road, oil on the road, dew on the road - all kinds of
reasons NOT to run slicks (including heat and wear)

As for 20 inchers, it's all "eye candy" if you are not on the track.