I was just rereading this thread and found that 1982400xs was talking about what the numbers in the tires size mean. He said what he thought and has it a bit backwards.
In a metric tire size as in a 130/90-16 the 130 is the section width of the tire.
The 90 is the aspect ratio of the tire. This is the ratio of the tire height from bead to tread, to the section width. the 90 is 90%, this means the width of a tire is 90 % of the tires height. a 130 wide tire, 130x 90% = 117. This is the height of the tire bead to tread.
You can use this to determine the over all height of a tire.
This 117 mm is the height of the tire from bead to tread. You have this height at the top and bottom of the wheel. so 117 x 2 is 234 mm We have to convert this to inches to match the wheel size. One inch is 25.4 mm. To convert the 234 to inches divide the 234 by 25.4 +9.2 inches. Add this to the wheel size of 16 and get 25.2 inches for and overall height.
This number will vary some because the 130 is not always measured the same way by the different tire manufacturers.
Leo