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Design of tire tread has an effect upon noise generated, especially at freeway speeds. [1] Generally there is a tradeoff of tread friction capability; deeper patterns often enhance safety, but simpler designs are less costly to produce and actually may afford some roadway noise mitigation.
The chief reason for tire replacement is friction from moving contact with road surfaces, causing the tread on the outer perimeter of tires to eventually wear away. When the tread depth becomes too shallow, like for example below 3.2 mm (4/32 in), the tire is worn out and should be replaced.
Tire tread wear: Worn tires will aquaplane more easily for lack of tread depth. Half-worn treads result in aquaplaning about 4.8–6.4 km/h (3–4 mph) lower than with full-tread tires. [6] Tire inflation pressure: Underinflation can cause a tire to deflect inward, raising the tire center and preventing the tread from clearing water.
The tread depth of a step is measured from the edge of the nosing to the vertical riser; if the steps have no nosing, it is the same as the going; otherwise it is the going plus the extent of one nosing. The going of a step is measured from the edge of the nosing to the edge of nosing in plan view. A person using the stairs would move this ...
The tread is a thick rubber, or rubber/composite compound formulated to provide an appropriate level of traction that does not wear away too quickly. [71] The tread pattern is characterized by a system of circumferential grooves, lateral sipes, and slots for road tires [26] or a system of lugs and voids for tires designed for soft terrain or ...
Shoe tread, pattern on the bottom of a shoe; Stair tread, horizontal portion of a set of stairs on which a person walks; Tire tread, patterned outer surface of a tyre that makes contact with the road; Tread (river terrace), the level section of a river terrace; Continuous track, a system of vehicle propulsion used in tracked vehicles