A harness is the system of straps, pads, and fittings that attaches a horse to a vehicle — a cart, carriage, sleigh, or agricultural implement — allowing the horse to pull a load efficiently and safely. Unlike a saddle and bridle, which are designed for ridden work, the harness is engineered for draft work: distributing force correctly across the horse’s body, protecting it from chafing, and giving the driver control through the reins. Harnessing has been integral to human civilisation for thousands of years, and the principles behind a working harness today are not vastly different from those used in ancient Rome or medieval England.
Components of a Horse Harness
A standard driving harness consists of several interconnected components, each with a specific function:
- Collar: The padded ring fitting around the horse’s neck and shoulders. In a full collar harness (the type used for heavy draft work), the collar sits against the shoulders and transmits pulling force directly. In a breast collar harness (more common for lighter vehicles), a broad strap crosses the chest. The collar or breast collar is the primary interface between horse power and vehicle.
- Hames: Metal arms fitted into the groove of a full collar, to which the traces attach. The hames transmit the pulling force from the collar to the traces.
- Traces: The long straps or chains that run from the hames (or breast collar) back to the vehicle. They are the direct connection through which the horse’s forward motion pulls the load.
- Saddle (or pad): A small padded saddle-like structure sitting on the horse’s back, supporting the backband and holding the shafts in position. Not to be confused with a riding saddle.
- Backband and tugs: The backband runs through the saddle and holds the shaft tugs — loops through which the shafts of a two-wheeled vehicle pass, keeping them level.
- Breeching: The broad strap running around the horse’s hindquarters. When the driver applies the brake or slows the vehicle, breeching allows the horse to hold the vehicle back using its haunches — essential for controlling a vehicle going downhill.
- Crupper: A small loop that passes under the tail and attaches to the saddle to prevent the harness from sliding forward. Particularly important on downhill terrain.
- Bridle and bit: The driving bridle typically includes blinkers (also called blinders or winkers) — square or D-shaped leather flaps fitted beside the eyes to restrict the horse’s peripheral vision and prevent it being startled by the vehicle behind it.
- Reins: The driver’s primary means of communication and direction. Driving reins are considerably longer than riding reins, running from the bit back through rings on the harness to the driver’s hands.
Types of Harness by Use
Harness design varies significantly depending on what the horse is pulling:
- Draft harness: Heavy-duty harnesses for pulling agricultural implements, heavy wagons, or logging equipment. Designed for maximum power transfer and durability. Breeds like the Shire, Clydesdale, and Suffolk Punch are the typical draft horse.
- Carriage harness: Used for driving carriages and coaches, often highly decorated with polished brass or silver fittings for show or ceremonial work.
- Competition driving harness: Used in combined driving (marathon, cones, and dressage), designed for lightness and manoeuvrability. The FEI regulates harness specifications for international competition.
- Pony harness: Scaled-down versions for ponies driving smaller vehicles. Pony classes in driving shows and competitions are popular and well-attended.
- Racing harness: Used in harness racing (trotting and pacing), extremely lightweight with minimal padding. The sulky (the two-wheeled vehicle used in harness racing) is attached via a simple traces-and-shafts system.
Harness Fitting and Welfare
A correctly fitted harness is essential for horse welfare. Key fitting principles include:
- The collar should fit snugly around the neck and shoulders without pinching — you should be able to slide a flat hand under it, but no more. A collar that is too loose shifts and rubs; one that is too tight restricts breathing and blood flow.
- The saddle should sit clear of the spine with weight distributed on the muscles either side.
- Breeching should be adjusted so it engages when needed without habitually pressing against the hindquarters.
- All metal components should be smooth and free of sharp edges that could cause abrasion.
Before driving, check every component of the harness systematically — a buckle that fails at speed can have serious consequences. Regular cleaning and leather conditioning extend the life of the harness and maintain the suppleness needed for the leather to lie correctly and comfortably against the horse.
Harness Racing in the UK
Harness racing — where horses trot or pace while pulling a lightweight sulky — is popular in many countries, including the UK and Ireland, though less prominent than flat and jump racing. Standardbreds are the breed of choice for harness racing worldwide, bred specifically for fast, ground-covering trotting action. The sport is governed by the British Harness Racing Club in the UK.
Frequently Asked Questions
Can any horse be trained to work in harness?
In principle, most horses can learn to accept a harness and pull a vehicle, though temperament matters considerably. Horses that are calm, forward-going, and accustomed to varied environments adapt more readily. Draft breeds and warmbloods are common in driving, but many native breeds, cobs, and even ex-racehorses are successfully trained. The introduction to harness work should be gradual — from accepting the harness on the body to long-reining, then a drag (introducing the sensation of pulling), then a vehicle. Rushing any stage creates problems that can be difficult to undo.
What is the difference between driving and riding tack?
The fundamental difference is that riding tack is designed to carry a rider on the horse’s back, while driving harness is designed to transmit the horse’s power forward to a vehicle. A riding saddle distributes rider weight; a driving pad supports the harness components. A riding bridle gives the mounted rider direct rein contact; a driving bridle includes blinkers and passes reins back to a driver sitting behind the horse. The two systems require quite different fitting principles and, at advanced levels, different specialist knowledge to fit correctly.
How do I care for leather driving harness?
Leather harness requires regular cleaning with a damp cloth or sponge to remove sweat and dirt, followed by conditioning with a quality leather dressing or neatsfoot oil to maintain suppleness. Metal fittings should be polished and checked for corrosion or wear. After use, harness should be hung up rather than piled on the floor to prevent creasing and cracking. Before each use, inspect all stitching, buckle holes, and trace connections — the consequences of harness failure at speed are serious, so thorough pre-use checks are non-negotiable.