This watch design is a very simple concept and reading the time is easy. To tell the time, you simple squeeze the sides of the tyre (no visible button).  The appropriate sections of the tread would then be illuminated to display the time in a digital format. Perhaps motorists will appreciate this concept of hours.

Design submitted by Peter from UK.

Concept LED Watch
Concept Dot-to-Dot Watch
LCD Watch and Ultrasonic Distance Meter
Tech world
Concept Gummy Watch