11.14.04.04

.04 Wheels and Tires.

A. Tire Inspection. Reference is made to Figures 17 and 18 for visual aid in determining tire wear. A radial ply tire may not be used with a nonradial-type tire on the same axle. All tires on the steering axle shall be the same size and type of construction. All tires shall be the same size on the same axle.

Procedures: Reject Vehicle If:
(1) Inspect for tire wear:
  (a) Tires without tread wear indicators.
  (b) Tires with tread wear indicators.
  (c) For cord exposure.
(2) Inspect for tread cuts, snags, or sidewall cracks.
(3) Inspect for bumps, bulges, or knots.
(4) Inspect for fabric breaks, and exposed or damaged body cords.
(5) Inspect for regrooved or recut tires (note: regrooved tires are not permitted on school vehicles or on any steering axle).
(1)
  (a) Tire is worn so that less than 2/32 inch tread remains when a measurement is made in any groove at three locations spaced approximately equally around outside of tire. Exception: 4/32 inch on front tires or steering axle.
  (b) Tire is worn so that the tread wear indicators contact the road in any two adjacent grooves at three locations spaced approximately equally around outside of tire. Exception 4/32 inch on front tires or steering axle.
  (c) Tire has a worn spot that exposes the cord through the tread.
(6) Inspect for mismatching of tire types. (2) Tire has tread cuts, snags, or sidewall cracks in any direction, and deep enough to expose cords.
(7) Inspect for mismatching of tire sizes (duals). (3) Tire has visible bumps, bulges, or knots indicating partial failure or separation of the tire structure.
(8) Inspect for tire size. (4) Tire has an unrepaired fabric break or sidewall has damaged body cords.
(9) Visually inspect for restricted usage marking on tire such as reclassified tires. (5) Tire has been regrooved or recut below original groove depth, except those that are designed and can be readily identified as regroovable.
(10) Inspect for recapped tires on front wheels or steering axle of school vehicle. (6) Tires are not the same size on the same axle.
(11) Inspect valve stems for leaks, damage or cracks. (7) The diameter of one of the duals is not within 1/2 inch of the other, or if the gauge block can be inserted between the tire and caliper.
(8) Tires are smaller than manufacturer's specified minimum or of a larger size that causes tire and body contact during different vehicle attitudes.
(9) Tire is:
 (a) Marked "For Farm Use Only";
 (b) Marked "Off Highway Use Only";
 (c) Marked "For Racing Use Only";
 (d) A metal studded snow tire during period when prohibited (April 1—October 31 in Allegany, Carroll, Frederick, Garrett, and Washington counties. Reject in other areas at any time).
(10) Recapped tires are used on the front wheels or steering axle of a school vehicle.
  (11) Valve stem is leaking, cracked, or damaged, or shows evidence of wear.

Figure 17—TIRE CONSTRUCTION

Figure 18—TIRE WEAR

Figure 19—MATCHING OF TIRES.

B. Wheel Inspection.

Procedures: Reject Vehicle If:
(1) Inspect wheel bolts, nuts, or lugs. (1) Wheel bolts, nuts, studs, or lugs are loose, missing, or damaged.
(2) Inspect for wheel damage. (2) Any part of the wheel is bent, cracked, rewelded, or damaged, to affect safe operation of the vehicle; loose or missing spokes on spoke-type wheels; or any wheel not the original, equivalent, or the one designated by the wheel manufacturer (Specialty Equipment Market Association, SEMA, or U.S./D.O.T. approved wheels and adapters are acceptable.
(3) Inspect for rims and lock rings for matching, condition, tightness of nuts and clamps, and evidence of slippage. (3) Rims and lock rings are obviously mismatches; nuts and clamps are loose; or there is evidence of slippage.