New Generation Wide Base Single Tires Policy

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Wide-base Single Tire Chart Weight for axle groups other than steer axles

Maximum Wide Base Single Tire Weight

RTAC

Class A1

Class B1

Maximum per tire

N/A

3,850 kg

3,850 kg

Single Axle Maximum

9,100 kg

7,700 kg

7,700 kg

Tandem Axle Unit

Tandem Axle Maximum

17,000 kg

15,200 kg

13,800 kg

Tridem Axle Unit

Axle spread 2.4 m to less than 3.0 m

21,000 kg

20,000 kg

19,000 kg

Axle spread 3.0m to less than 3.6 m

23,000 kg

22,000 kg

19,000kg

Axle spread 3.6 m to 3.7 m

24,000 kg

22,000 kg

19,000kg

Tridem Drive Axle Unit

Axle spread 2.4 m to less than 2.8 m

21,000 kg

20,000 kg

19,000 kg

Tridem Drive Axle Unit (on a vehicle with a tandem steer axle group)

Axle spread 2.7 m to less than 3.0 m

22,000 kg

20,000 kg

19,000 kg

Refer to Sections 9(4) and 9(5) of M.R. 575/88 for track width on semi trailers, pony trailers and full trailers equipped with wide-base single tires.