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.
Report Abuse. Tread Depth will vary depending on the size and application of the tire in question. Low profile tires may have as little as 5/32 of tread when new. Tires for a tractor (18 wheeler) will have almost a full inch of tread (31/32) on the drive tires. You not only have to look at tread depth, but tread pattern and the compound rating of the rubber used to make the tire. Your best bet to get the information you seek is go to a tire store and pick someone's brain.