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.
A helpful guide on the importance of tread depth and safety. Share this: A new car tyre begins life with approximately 8mm of tread. The minimum legal tread depth is 1.6mm, however most motoring organisations recommend changing at 2mm and the majority of tyre manufacturers recommend changing at 3mm.