The pattern of the rubber part that meets the road.
it is a tread
it is a tread
The tread of a tire or track refers to the rubber on its circumference that makes contact with the road. As tires are used , the tread is worn off , limiting its effectiveness in providing traction. A worn tire tread can often be retreaded. The word tread is often used incorrectly to refer to the pattern of grooves cut into the rubber . Those grooves are correctly called the tread pattern, or simply the pattern .
That would probably depend on the tire size and tread pattern.
This tyre pattern contains both asymmetric and directional features.
The "tread" is the part of the tire that is supposed to touch the ground. A tire with no tread would be a tire that is not supposed to touch the ground. You may be wondering why tires have a pattern of grooves (a.k.a., voids) in the tread. They're for bad weather. The grooves allow rain, and (if they're wider) mud and snow to squelch out from under the tire so that the tread can come into contact with something solid on which to get a grip.
It is an indicator of tire tread wear.
If there is a directional arrow on the side wall of the tire, then that should be followed.
When tires are made, the tread pattern has grooves in them. There are parts of the grooves that are not as deep as others. When the tire has worn down to that level, the tread has worn away to the point where they are no longer safe to drive on. The bars are clearly visible going across the tire.
If you mean tire tread depth, the minimum is 1.6mm.
Tire spec in PA is 2/32 of an inch of minimum tread
Minimum LEGAL tire tread depth is 2/32nds of an inch.