(from left, clockwise)
ROTATION DIRECTION
If the tire's tread pattern or even compound is designed to work while
rolling in a specific direction, the company will stamp their recommended
rotating direction. Follow their advice or your buddies will razz you if
they notice you've mounted the tire backwards. Some tires have bidirectional
tread so you don't need to worry.
COUNTRY OF ORIGIN
Get the magnifying glass out. This can be in tiny type.
HOT PATCH
Normally, a rectangular, multicolored ID stencil that lists the tire model
and tire size. Other information can include the compound, casing
construction and bead type. The hot patch is located on the drive side of
the wheel (on bidirectional tires, the hot patch might be located on the
non-drive side or the tire maker will use a hot patch on both sides).
MOLD NUMBERS
The manufacturer's mold number doesn't mean anything to the rider. Factory
workers use this number to place the correct tires in the correct molds for
curing.
AIR PRESSURE RANGE
These are recommended minimum and maximum air pressures for the tire. This
tire should be used with at least 30 psi and no more than 50 psi. For those
readers enjoying MBA in a foreign country, the other numbers represent the
same thing (psi minimums and maximums) in bar's and kpa's.
TIRE SIZE (millimeters)
There are two numbers inside the parentheses. The first is the tread width
target in millimeters. The second is the metric diameter of the bead (all
26-inch tires will show the number 559).
TIRE SIZE (inches)
The first number is the tire diameter and the second is the tire's width. In
this case, it is a 26-inch tire that is 2.5 inches wide.
From
http://www.mbaction.com
Manssstap!