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U.S. coins can be substituted for a tire tread depth gauge as tires wear to the critical final few 32nds of an inch of their remaining tread depth. 2/32" remaining tread depth Place a penny into several tread grooves across the tire. If part of Lincoln's head is...
Penny test for tires – how to measure tread depth. You may have heard of the penny test for tire tread depth and wondered if it’s something a layperson can manage, and a reliable test and indication of tire tread depth.
There are several popular ways to check your tire tread depth. One easy way is the penny test. Simply insert a penny into your tire's tread groove with Lincoln's head upside down and facing you.
A tire that starts with 10/32" of original tread depth has 12.5% wear for every 1/32" that is worn away, and a tire that starts with 12/32" " of original tread depth, has 10% wear for every 1/32" that is worn away, etc.
Tires depend on good tread condition depth to maintain traction and to shed water on wet roads. The tread should be checked at least once a month for excessive and uneven wear.
A Air Check During an air check, a driver or technician uses a pressure gauge to determine the amount of air currently inflating a tire. You should perform an air check every other time you fill up with gas, each time your tires are rotated, or once a month.
Keep even tire wear. Monitor every few months. Measure with these units. Keep a log. Know when to rotate your tires, or replace a pair. 2/32-inch is the legal wear-out limit, but only a fool drives around on bald tires.
Check the wear of your tread quickly by inserting a Lincoln penny into it. Take a Lincoln penny and place it upside down with Lincoln facing you in the center of the tread at the thickest part of the tire.
DO YOU NEED NEW TIRES? You need to be aware of a couple things when deciding if you need new tires: tread wear, exposure to the elements and tire age.
Tire warranties can cover premature wear, road hazards and defects, but improper use or maintenance can void your coverage. If something happens to your tires, it's best to know your options.