Towed Mass

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

Trailer/implement brake system	Max. permissible towed mass		Max. speed
	6140R and 6150R	6170R to 6210R
- unbraked ..............	3000 kg (6615 lb)	3000 kg (6615 lb)	25 km/h (15.5 mph)
- independent ..............	4000 kg (8820 lb)	4000 kg (8820 lb)	25 km/h (15.5 mph)
- overrun brake ..............	8000 kg (17635 lb)	8000 kg (17635 lb)	25 km/h (15.5 mph)
- hydraulic brake ..............	37000 kg (81570 lb)	36000 kg (79365 lb)	25 km/h (15.5 mph)
- single-line air brake ..............	37000 kg (81570 lb)	36000 kg (79365 lb)	25 km/h (15.5 mph)
- dual-line air brake ..............	37000 kg (81570 lb)	36000 kg (79365 lb)	max. 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.