On Thu, 30 Mar 2006 21:31:09 -0500, "John Gaquin"
wrote:

The only tread on aircraft tires are straight grooves running around the
tire...... water channels. Even when the tread is worn down, there's still
a lot of rubber left on the tire.

If you want to get a close up look at heavy duty aircraft tires, go
down to the marina and find your friendly neighborhood travel lift.
Supposedly they use aircraft tires because of the load weight
requirements.