User:Lorikeet/Draft of TKPH

See the old TKPH article, Tire, Subpages

Tread wear
Friction between the tire and the roadway causes the tread rubber to wear away over time. Government standards prescribe the minimum allowable tread depth for safe operation. There are several types of abnormal tread wear. Poor wheel alignment can cause excessive wear of the innermost or outermost ribs. Over inflation can cause excessive wear to the center of the tread. Under inflation can cause excessive wear to the outer ribs. Tire manufacturers and car companies have mutually established standards for tread wear testing that include measurement parameters for tread loss profile, lug count, and heel-toe wear. Also can be known as tire wear. See also TKPH below.

TKPH
Ton kilometre per hour (TKPH) is the measurement of the work load of a tire and is used for monitoring its work so that it is not put under undue stress which may lead to its premature failure. The measure is not part of the metric system even though it uses its base units. The recent shortage and increasing cost of tires for heavy equipment has made TKPH an important parameter in tire selection and equipment maintenance for the mining industry. For this reason tire manufacturers of large earth-moving and mining vehicles assign TKPH ratings to their tires based on their size, construction, tread type, and rubber compound.

Weight and speed.

The equivalent measure used in the United States is ton mile per hour (TMPH).