MIL-T-12459E
REQUIREMENTS
3.
3.1 First article. Unless otherwise specified (see 6.2), the contractor
shall furnish sample tires which shall be subjected to first article
inspection (see 4.4). First article inspection samples, properly marked with
identifying information shall be representative of the tires to be furnished
to the Government. All subsequent tires delivered to the Government shall
conform to these samples in all of their pertinent physical and performance
attributes.
3.2 Materials (see 4.7.1).
3.2.1 Compounds. The compound used in construction of all tires shall
be of natural rubber, synthetic rubber or a combination thereof. The tread
compound shall contain no reclaimed rubber.
3.2.2 Carcass cords. The material used for carcass cords shall consist
of rubberized nylon cord fabric.
3.2.3 Breaker cords. Breaker cords shall be of nylon.
3.2.4 Recycled, virgin and reclaimed materials. There are no
requirements for the exclusive use of virgin materials; however, all
materials shall be new and unused. The use of recycled or reclaimed
(recovered) materials is acceptable except for tread compound provided that
all other requirements of this specification are met (see 6.6.1).
3.3 Design and construction. Tubes for tubed type tires shall conform
to ZZ-I-550. For class MTL, tire 11.00-18/6 ply rate (PR) load range C,
shall be used with special rim drawing 11659953. All other tactical military
tires shall conform to the dimensions specified In figure 1 and 2 as
applicable. All other design and construction features shall conform to the
respective Army drawings for these tires or as specified by the contracting
authority (see 4.7.1, 4.7.2 and 6.2).
3.3.1 Tread. The tread design for all tires shall be of
non-directional design as shown in figures 1 and 2. The tread stock shall
extend to the shoulder terminal end of the tread lug for class MS tires. For
class CC tires, the tread compound shall extend at least 1/2 inch below the
shoulder, which, in this class, is defined as the point of maximum flat-plate
footprint when the tire is deflected at the rated load and inflation in an
ambient air temperature between 70 degrees Fahrenheit (°F) to 90°F (see
4.7.1.1 and 4.7.2).
3.3.1.1 Undertread thickness. Undertread thickness shall be not less
than 25 percent (%) of the skid depth shown in the "M" column of figures 1
and 2 (see 4.7.1.1 and 4.7.2).
3.3.2 Weights. The weight of the tire shall be not more than 25.0
pounds (lbs) for 6.00-16 Light Weight (LW) size tires and 28.0 lbs for
7.00-16LW size tires. At the time the first article sample is submitted for
inspection, the supplier shall establish an average weight for each type and
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