SECTION II. EQUIPMENT DESCRIPTION AND DATA (Con't)
1-8. EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES (Con't).
e. TIRE TREAD TYPES OFF
ROAD/LOW SPEED TIRES (CON'T).
(2) Grader Tires. Grader tires are similar to
earthmover tires except they are designed for lower
inflation pressures and for service involving
extreme angular ground contact. The aggressive
directional tread provides good traction in mud and
snow and in soft soils. Tires with directional tread
may only be mounted one way. The point of the V
design must contact the ground first when traction is
(3) Rock Service Tires. Rock service tires
are large size tires of standard construction used on
commercial vehicles for off-road service and on
unpaved roads. These tires are characterized by
narrow voids so that loose rock cannot be caught
and tear the tread lugs loose from the tire body. This
tread design is used on tires for service on rough
f. TIRE TREAD TYPES
INDUSTRIAL AND AGRICULTURAL
(1) Implement Tires. Implement tire are
similar to tractor front tires except they are designed
for towed vehicles. The smooth tread is used when
neither steering nor traction are important.
(2) Straight Side Industrial Tires. Straight
side industrial tires are of standard construction and
are similar to truck and bus rib tires in appearance
except they are generally smaller.
(3) Tractor Tires. Tractor front tires are rib
tires and are smaller than tractor rear drive axle
tires. A rib tread design is used on the front axle for
easy steering when traction is unimportant. Tractor
rear tires are usually much larger than the front tires.
The aggressive directional tread design has large
voids to provide maximum traction in soft soils.
GRADER, DIRECTIONAL TREAD TIRE
TRACTOR FRONT AND REAR
ROCK SERVICE TIRE