**TYPE A-II SCHOOL BUS** (Over 14,500 pounds) BRAKE GAWR GAWR GVWR CAPACITY LINING SIZE FRONT REAR TOTAL TIRE SIZE 10-47 4” Front 6” Rear 9,000 14,200 23,200 10R x 22.5 10 ply Type A-II school buses exceeding 14,500 pounds GVWR shall have air brakes. **TYPE C SCHOOL BUS** 10-47 4” Front 6” Rear 9,000 15,000 24,000 10R x 22.5 12ply 48-54 4” Front 6” Rear 9,000 17,000 26,000 10R x 22.5 12 ply 55-72 4” Front 7” Rear 9,000 19,000 29,000 10R x 22.5 14 ply Type C school buses exceeding 72 capacity shall have prior, written SDE approval. **TYPE C-1 SCHOOL BUS** **TYPE D FRONT ENGINE** 10-53 4” Front 6” Rear 10,000 17,000 27,000 10R x 22.5 12 ply 54-66 5” Front 7” Rear 11,000 17,000 28,000 10R x 22.5 12 ply 67-78 5” Front 7” Rear 13,000 19,000 32,000 11R x 22.5 14 ply 79-84 6” Front 8” Rear 13,000 20,000 33,000 11R x 22.5 16 ply **TYPE D REAR ENGINE** 42-66 5” Front 7” Rear 12,000 19,000 31,000 11R x 22.5 14 ply 67-78 6” Front 7” Rear 12,000 19,000 31,000 11R x 22.5 14 ply 79-84 6” Front 8” Rear 13,000 21,000 34,000 11R x 22.5 16 ply Type D school buses exceeding 84-capacity shall have prior, written SDE approval.
**TYPE A-II SCHOOL BUS** (Over 14,500 pounds) CAPACITY BRAKE LINING SIZE GAWR FRONT GAWR REAR GVWR TOTAL TIRE SIZE 10-47 4” Front 6” Rear 9,000 14,200 23,200 10R x 22.5 10 ply Type A-II school buses exceeding 14,500 pounds GVWR shall have air brakes. **TYPE C SCHOOL BUS** 10-47 48-54 55-72 4” Front 6” Rear 4” Front 6” Rear 4” Front 7” Rear 9,000 9,000 9,000 15,000 17,000 19,000 24,000 26,000 29,000 10R x 22.5 12ply 10R x 22.5 12 ply 10R x 22.5 14 ply Type C school buses exceeding 72 capacity shall have prior, written SDE approval. **TYPE C-1 SCHOOL BUS** **TYPE D FRONT ENGINE** 10-53 54-66 67-78 79-84 4” Front 6” Rear 5” Front 7” Rear 5” Front 7” Rear 6” Front 8” Rear 10,000 11,000 13,000 13,000 17,000 17,000 19,000 20,000 27,000 28,000 32,000 33,000 10R x 22.5 12 ply 10R x 22.5 12 ply 11R x 22.5 14 ply 11R x 22.5 16 ply **TYPE D REAR ENGINE** 42-66 67-78 79-84 5” Front 7” Rear 6” Front 7” Rear 6” Front 8” Rear 12,000 12,000 13,000 19,000 19,000 21,000 31,000 31,000 34,000 11R x 22.5 14 ply 11R x 22.5 14 ply 11R x 22.5 16 ply Type D school buses exceeding 84-capacity shall have prior, written SDE approval.