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.
The tread depth groove in the tyres will tell you when your tyres are at the bare legal minimum of 1.6mm, ideally you should change your tyres earlier. The best way to check you tread depth is to buy a tread depth gauge.The gauge will give you the exact amount of tread remaining and will a lot more accurate.ost tyres now also have a depth indicator as shown in the picture above. The depth indicator is placed around the tyre within the groove. This is an easy way to check your tread depth. Once this groove indicator levels off with the top the tread the tyres are at 1.6mm.