Hackamore shanks

Hackamore shanks: the hackamore's leverage system

Hackamore shanks are the primary mechanical component of a hackamore. They connect the reins to the noseband and curb chain, determining how the leverage system functions. Their length, shape and geometry directly influence the transmission of the rider's rein aids.

Unlike a bit, which acts inside the horse's mouth, hackamore shanks distribute pressure between the nose, the curb chain beneath the jaw and the poll. However, they never work in isolation: their behaviour always depends on the interaction of all the hackamore's components.

Shank length and shape: two complementary factors

Hackamore shanks differ not only in length but also in shape. Both characteristics influence the mechanical action of the hackamore in complementary ways.

The length of the hackamore shanks determines the amount of leverage generated when rein pressure is applied. Short shanks generally provide a more direct response, while longer shanks progressively increase mechanical advantage. The overall action also depends on the noseband, the curb chain, the adjustment of the hackamore and the quality of the rider's hands.

The geometry of the shanks (straight, curved, angled, anatomical, etc.) influences how the hackamore comes into action. Depending on their design, they may alter the angle of rotation, the progression of the leverage or the stability of the cheekpieces under rein pressure. As a result, two pairs of shanks of identical length may perform quite differently because of their shape.

Shanks are only one part of the hackamore

From a bit & bridle fitting perspective, a hackamore should always be assessed as a complete mechanical system. While the shanks determine the leverage, they interact with several other key components:

• the hackamore noseband, which determines the contact surface on the horse's nose;
• the hackamore curb chain, which completes the lever action beneath the lower jaw;
• the hackamore bridle, whose adjustment determines the positioning of the entire system;
• hackamore accessories, such as shanks protectors if necessary.

It is the combination of these components that determines how pressure is distributed and how the hackamore ultimately functions.

Competition regulations 

The length of hackamore shanks is regulated in certain equestrian disciplines. This restriction is not based on aesthetics but on the fact that shank length directly affects the amount of leverage generated by the hackamore. As permitted dimensions may vary between federations and disciplines, it is advisable to consult the relevant competition rules before use.

Understanding the hackamore as a complete system

At Mors And More, we offer a wide selection of hackamore shanks. It is important to remember that the same pair of shanks can produce very different sensations depending on the noseband, curb chain, adjustment and the horse's individual sensitivity. The choice of shanks is just as important as the curb chain, noseband and hackamore bridle when evaluating whether the equipment is suited to your horse.