Freebase (0.00 / 0 votes) Rate this definition: Tachypnea. Tachypnea is the condition of rapid breathing. In adult humans at rest, any rate between 12-20 breaths per minute is normal and tachypnea is indicated by a ventilatory rate greater than 20 breaths per minute.
A new tire retains a tread depth from 10/32 to 11/32. This tread depth is usually made to last anywhere from 3 to 5 years, depending on how well it is maintained. To measure the tread of a tire using an available chart, follow these steps: Insert a penny into the tire.
For decades, a quick test for tire treadwear has consisted of placing a penny on edge in a tireâs grooves. If the top of Abe Lincolnâs head remains visible, the tread is less than 2/32nds of an inch, meaning it was time for new tires. In fact, tread depth below 2/32nds makes those tires âillegalâ in some states. Even without a state law, most all industry players acknowledge the danger of riding on the worn-out tires.