The treadwear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified government test track. A tire graded 200 would last twice as long on the government test course under specified test conditions as one graded 100.
Most wine racks are designed to allow a wine to be stored on its side. The thinking behind this orientation is that the cork is more likely to stay moist and not dry out if it is kept in constant contact with the wine. Some wineries package their wines upside down in the box for much the same reason.
Conventional wisdom says that wines should be stored at an ideal humidity level of 70 percent. The theory goes that dry air will dry out the corks, which would let air into the bottle and spoil the wine. Yes, this does happen, but unless you live in a desert or in arctic conditions, it probably wonât happen to you.