Depending on location and vehicle size, tread depth must be at least 2/32 inch or greater.
Tire tread is 205 MM wide or 8 inches Side wall height is 40 % of tread width or 81.7 mm or 3.2 inches Wheel size is 17 inches Overall tire height is 23.4 inches or 595 mm
It really does not matter how many there are as there are several around the tire. When the tread wear indicators appear flush with the tread you have 1/16" tread left and should look to replace the tires very soon.
LGV's must have a tread depth of at least 1mm across 3/4 of the breadth of the tread and in a continuious band around the entire circumference
It is an indicator of tire tread wear.
There should be at least 2 mm.
A tire with a tread has less contact with the road surface than one with no tread. When racing you want to maintain as must tire surface in contact with the racing surface as possible.
30 inches tall, tread width of 9.5 inches, on a 15 inch diameter rim.
It would be the tread face width by the rim diameter. For instance if you have a 13.6 X 38 tire, which was common on older tractors, it would be 13.6 inches across the tire tread area and 38 inches diameter inside the bead , or 38 inches across the rim to where the tire bead seats which is slightly less than the total distance across the rim.
Useful information: 86 miles tire radius of 16 inches In order to find how many revolutions the tire undertakes you must divide the amount traveld by the circumference of the tire (The length of tire tread). To find the circumference you multiply the diameter by Pi (3.14) The diameter is twice the radius or 32 inches 32 in. x 3.14 = 100.48 in. 86 miles equals 5,448,960 inches 5448960 in. /100.48 in. = 54229.3 revolutions
If you mean tire tread depth, the minimum is 1.6mm.
Tire spec in PA is 2/32 of an inch of minimum tread
Minimum LEGAL tire tread depth is 2/32nds of an inch.