Taken from a manufactures descrition 

The Concept

The Barrel Train is an american idea, which was first developed for the UK market in 2005. Each Barrel Train is a small trailer and when linked together they form a rugged off road train. Towed by a compact tractor or a quad, the Barrel Train has quickly become a hit at many farm parks.

Versatility

The Barrel Train is designed so that each barrel will follow the one in front, it will meander wherever the drive vehicle takes it. The quad tyres and low centre of gravity keep the train very stable.

Reliability

They are very easy to operate, safe and very reliable. They are easy to pressure wash clean and each barrel comes equipped with a safety belt.

The Barrels can be towed in a daisy chain with a suitable vehicle, a standard quad or small agricultural tractor at a recommended maximum speed of 5 miles an hour. Safety Seat belts are fitted to the robust fabricated steel chassis. Chunky pneumatic tyres give a bumpy, bouncy fun ride. All terrain robustness. Variable train length. Anti roll bars fitted if 6+ barrels linked.

 Barrel Train Technical Information Propulsion: Standard ATV or small farm tractor

Brakes: Driver controlled at propulsion source

Chassis: Fabricated steel, galvanised or powder coated

Body: Reformed sturdy high density HDPE plastic

Tyres: Pneumatic ATV type

Safety: Seat belts fitted

Weight: Approximately 49kg

Speed: Recommended maximum speed 5 mph

Recommended Age of Passenger: 3 years upwards