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.
Tread Depth. 1  When life gets busy and youâre more focused on where youâre going than how youâre getting there, the tread depth of your tires can be easy to overlook. But when it comes to tire maintenance, proper tread depth is one of the easiest ways to help maximize your safety and performance.