Towed Mass

Depending on how the trailer/implement is braked, the following masses and speeds are permitted:

Trailer/implement brake system Maximum permissible towed mass Top speed
- unbraked...  3000 kg (6615 lb) 25 km/h (15.5 mph)
- independent...  4000 kg (8820 lb) 25 km/h (15.5 mph)
- overrun brake...  8000 kg (17635 lb) 25 km/h (15.5 mph)
- hydraulic brake... 34000 kg (74955 lb) 25 km/h (15.5 mph)
- single-line air brake... 34000 kg (74955 lb) 25 km/h (15.5 mph)
- dual-line air brake... 34000 kg (74955 lb) Maximum design speed

 

There may be legal limits in force that restrict the maximum towed mass and/or travel speeds to figures lower than those quoted here.

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