**TYPE A-I SCHOOL BUS** Type A-I and A-II under 14,500 pounds GVWR shall be built to manufacturer’s specifications. All type A under 14,500 pounds GVWR shall have four-wheel disc brakes. **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 14,200 23,200 10R x 22.5 10 ply 48-54 4” Front 6” Rear 9,000 16,000 25,000 10R x 22.5 10 ply 55-72 4” 7” Rear 9,000 17,500 26,500 10R x 22.5 12 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 10,800 17,000 27,800 10R x 22.5 10 ply 54-66 5” 7” Rear 11,000 17,000 28,000 10R x 22.5 10 ply 68-78 5” Front 7” Rear 11,000 19,000 30,000 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” 7” Rear 12,000 19,000 30,000 11R x 22.5 16 ply 68-78 6” Front 7” Rear 12,000 19,000 30,000 11R x 22.5 16 ply 79-84 6” Front 8” Rear 12,000 21,000 33,000 11R x 22.5 16 ply Type D school exceeding 84-capacity shall have prior, written SDE approval.
**TYPE A-I SCHOOL BUS** Type A-I and A-II under 14,500 pounds GVWR shall be built to manufacturer’s specifications. All type A under 14,500 pounds GVWR shall have four-wheel disc brakes. **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” 7” Rear 9,000 9,000 9,000 14,200 16,000 17,500 23,200 25,000 26,500 10R x 22.5 10 ply 10R x 22.5 10 ply 10R x 22.5 12 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 68-78 79-84 4” Front 6” Rear 5” 7” Rear 5” Front 7” Rear 6” Front 8” Rear 10,800 11,000 11,000 13,000 17,000 17,000 19,000 20,000 27,800 28,000 30,000 33,000 10R x 22.5 10 ply 10R x 22.5 10 ply 11R x 22.5 14 ply 11R x 22.5 16 ply **TYPE D REAR ENGINE** 42-66 68-78 79-84 5” 7” Rear 6” Front 7” Rear 6” Front 8” Rear 12,000 12,000 12,000 19,000 19,000 21,000 30,000 30,000 33,000 11R x 22.5 16 ply 11R x 22.5 16 ply 11R x 22.5 16 ply Type D school exceeding 84-capacity shall have prior, written SDE approval.
Alabama%20Minimum%20Specifications%20for%20School%20Buses%202011.docx