Polo Bridle and Bit Selection: A Complete Guide

The bridle and bit are among the most technically complex areas of polo equipment, touching on equine anatomy, biomechanics, horse psychology, and riding technique in ways that few other pieces of equipment do. A poorly chosen bit can cause discomfort or pain to the horse, leading to resistance, unreliability, and unsafe behaviour. A correctly chosen bit in a well-fitted bridle is a quiet, effective communication channel that makes the polo [pony](/glossary/pony)'s job easier and the player's control more precise.

This guide provides a thorough overview of polo bridle construction, bit types used in polo, fitting principles, and the considerations that should guide your selections. For background on overall equipment investment, see our [equipment guide](/equipment).

Polo Bridle Construction: The Basics

A polo bridle is a modified double bridle configuration — typically running two bits simultaneously — that gives the rider the range of control signals required for the fast, turning, stopping demands of polo. Understanding the parts helps decode the choices.

The Headpiece and Cheekpieces

The headpiece sits behind the ears and supports the entire bridle. In polo, headpieces are typically made from leather — bridle leather for quality pieces, synthetic materials for budget or weather-resistant options. The cheekpieces attach the headpiece to the bit rings on each side.

The Browband

The browband runs across the forehead, preventing the headpiece from sliding back. In polo, browbands are often plain or lightly decorated — elaborate showring browbands are impractical.

The Noseband

The noseband configuration is critically important in polo. The most common noseband types used in polo are:

**Cavesson noseband**: The traditional simple noseband. Provides a modest degree of mouth closure and is the mildest option.

**Flash noseband**: A cavesson with an additional strap that crosses below the bit rings to close the mouth more firmly. Widely used in polo.

**Figure-8 (grackle) noseband**: Crosses high on the nose and low under the chin, distributing pressure differently from a flash. Popular for horses that are strong pullers.

**Drop noseband**: Fits below the bit. Less commonly used in polo than in dressage.

The noseband must be fitted with at least two fingers' width of space — tighter than this constitutes restriction and affects the horse's ability to flex the jaw, which is part of healthy equine movement.

The Reins

Polo reins have specific requirements driven by the need to hold them in one hand (the non-[mallet](/glossary/mallet) hand) while the other hand wields the mallet. Polo reins are typically:

**Laced or plaited leather**: Provides grip when the hand is sweaty or gloved. Most professional players use laced leather reins.

**Continental (rubber-covered) reins**: Provide excellent wet-weather grip. Common in Argentine polo.

**Loop reins**: A polo-specific design where a loop at the end of the reins prevents them from being dropped if the hand opens briefly.

Rein length is an important practical consideration. Polo reins are typically shorter than dressage or jumping reins — this prevents excess rein from falling to the side and becoming entangled.

Bit Types in Polo

Polo uses a wider variety of bits than almost any other equestrian discipline, reflecting the diverse range of horse responses that polo demands and the diverse individual horses that players ride.

The Pelham

The pelham is the most commonly used bit in polo at all levels. It is a single mouthpiece with two sets of rings — one for a bridoon (snaffle) rein, one for a curb rein — allowing both direct and leverage action from a single bit.

**Why polo uses pelhams**: The pelham provides the range of signals that polo requires — direct (snaffle) action for lateral movement and turning, curb (leverage) action for stopping and collection — while using only one bit rather than two. This simplicity is valuable in the dynamic polo environment.

**Mouthpiece options for pelhams**: Pelhams come with various mouthpiece configurations:

**Pelham cheek length**: The length of the cheek below the mouthpiece determines the leverage ratio. Short cheeks (3–4 inches) are milder; longer cheeks (5–6 inches) increase leverage. Most polo pelhams have moderate cheeks.

**Pelham converters**: A converter is a leather loop that connects the two rings on the same side, effectively running one rein on both rings. This simplifies rein use but reduces the precision of rein differentiation.

The Double Bridle (Full Bridle)

The double bridle uses two separate bits: a bradoon (lightweight snaffle) and a Weymouth curb. This provides maximum refinement of communication and is used by more advanced riders on horses trained to accept the double.

In polo, the double bridle is less common than the pelham — the added complexity of two bits and four reins is generally considered impractical for polo's demands. However, some very experienced players use doubles on highly trained horses.

The Gag (Elevator) Bit

The gag bit is a snaffle configuration where the cheekpieces of the bridle pass through rings on the bit and attach to the reins below, creating an upward (gag) action on the corners of the mouth when rein pressure is applied.

Gags are used in polo primarily for strong, forward-pulling horses. The gag action lifts the head rather than lowering it (as a curb does), which can help with horses that lean heavily on the forehand.

**Gap varieties in polo**: The Duncan gag, the continental gag, and the three-ring (elevator) gag are all used in polo. The three-ring gag offers three rein attachment points for variable leverage.

The Hackamore

The hackamore is a bitless bridle that acts on the horse's nose and chin groove. Polo hackamores (mechanical hackamores) use leverage pressure on the nose and chin rather than mouth pressure.

Hackamores are used in polo primarily for horses with mouth injuries, dental problems, or specific sensitivities. They are not commonly used as primary bridles for most horses. Polo associations generally permit hackamores but may have specific rules about their use in competition.

The Kimberwicke

The kimberwicke is a D-ring bit with slots for the reins at different heights and a port mouthpiece. It provides mild curb action and is sometimes used for younger or less forward horses. Less common in senior polo than the pelham.

Bit Fitting: The Foundation of Everything

The correct bit size must match the horse's mouth. An incorrectly sized bit causes discomfort and produces the resistance and evasion behaviours that players often wrongly attribute to character or training.

Width

Bit width is measured across the mouthpiece from ring to ring (or cheek to cheek). The correct width allows approximately 2–4mm of space on each side between the ring and the corner of the horse's lips. A bit too narrow pinches the lips; a bit too wide slides laterally in the mouth and creates inconsistent pressure.

Most horses fit bits in the 11cm to 13.5cm range, with 12–12.5cm being the most common.

Mouthpiece Thickness

Thicker mouthpieces distribute pressure over a larger area and are generally milder. Thinner mouthpieces concentrate pressure and are generally stronger. However, horses with shallow palates may find thick mouthpieces uncomfortable even though they are theoretically milder.

Position in the Mouth

The bit should sit comfortably against the corners of the mouth, creating a very mild wrinkle or none at all. A bit hanging too low may bang the teeth; a bit adjusted too high creates constant pressure on the corners.

Bridle Fitting Principles

**Headpiece**: Sits behind the ears without pinching the base of the ears. The throatlash should allow a full hand's width of space between it and the horse's cheek when fastened.

**Browband**: Lies flat across the forehead without pulling the headpiece forward toward the ears.

**Cheekpieces**: Symmetrical on both sides. Uneven cheekpiece adjustment creates uneven bit position in the mouth.

**Noseband**: Sits approximately two finger-widths below the horse's cheekbone. Allow two to three finger-widths of space between noseband and nose.

Bit Selection Considerations by Horse Temperament

**Quiet, sensitive horse**: Start mild — a mullen-mouth pelham or straight-bar pelham. These horses often over-react to strong bits and develop tension.

**Forward, enthusiastic horse**: A pelham with moderate cheeks may be appropriate. Consider a gag if the horse pulls consistently.

**Strong, resistant stopper**: A stronger bit may be needed — a high-port pelham or a gag with longer shanks. Work with a trainer rather than simply increasing severity.

**Anxious, head-tossing horse**: The cause of head-tossing must be diagnosed before changing bits — dental pain, ill-fitting tack, and poor riding technique are all common causes. A stronger bit rarely solves anxiety-based problems.

**Young, green horse**: Start with the mildest effective option. A young horse in heavy hands with a severe bit is a welfare and safety concern. See our [polo ponies](/learn) guide for more on horse training and welfare.

Frequently Asked Questions

How often should I change bits on my polo horse?

There is no set schedule. Change bits when you observe consistent resistance, evasion, or discomfort that is not resolved by training or dental care. Frequent bit-changing without diagnosing the underlying cause is counterproductive.

Should I consult a professional before changing bits?

Yes, ideally. A polo trainer or equine dentist can often identify the cause of bit-related problems more accurately than a player experimenting independently. Bit changes made with professional guidance are more likely to be effective.

Do I need different bits for different horses?

Almost certainly yes, if you ride multiple horses regularly. Each horse has individual mouth conformation, training history, and temperament that makes a single bit rarely optimal across a full [string](/glossary/string) of horses.

What is the difference between a pelham and a kimberwicke?

Both provide curb action from a single mouthpiece. The kimberwicke uses a D-ring with slotted rein positions; the pelham has separate rings for snaffle and curb reins. The pelham provides more differentiated rein signals; the kimberwicke is simpler. Most polo-specific use favours the pelham.

Can I use a gag as my primary bit?

Yes, and many players do for horses that suit them. Gags work well for forward, pulling horses but can create head-raising tension in horses that do not need the upward action. They are not universally appropriate.

How do I know if my bit is causing discomfort?

Signs include chomping, head-tossing, gaping mouth, consistent resistance to rein contact, uneven bend through turns, and reluctance to move forward. Any persistent unexplained behaviour change warrants dental and tack assessment.