07/29/2026
Interior pressures come from the mouthpiece and include bar, tongue, and squeeze forces.
Bar pressure is present in all bits to some degree, though the intensity varies. It is often well tolerated compared to tongue pressure unless there is existing sensitivity or trauma in the bars. When an appropriate bit is used for an individual horse, it can support poll flexion and encourage release in the jaw.
Tongue pressure is present in most designs but has become increasingly associated with resistance. When tongue pressure is accepted by a horse, it can support correct flexion and connection; when rejected, it often presents as tension, evasions, or instability in the contact.
Squeeze occurs primarily in jointed designs and varies based on construction. In appropriate amounts and with a correctly fitting mouthpiece, it may be well tolerated. When excessive or if a horse does not tolerate it well, it commonly produces avoidance behaviors such as elevation or loss of connection.
Exterior pressures are created through the cheek pieces and bridle mechanics.
- Poll pressure results from leverage systems where rein pressure is transferred through the shank or purchase of the bit, creating force behind the ears.
- Cheek pressure supports lateral influence and stability. It is most present in fixed cheek designs and can assist in clarity of directional aids, particularly in training.
- Curb pressure is created through engagement of the curb chain or strap in the chin groove. If too tight, pressure becomes constant, and leverage is reduced. If too loose, leverage increases without adequate control.
The correct selection of each of these for every individual horse requires experience, observation, and an understanding of how these pressures interact.
Working with an experienced fitter is what allows these variables to be evaluated accurately and translated into effective choices for the individual horse.
Looking to find the right bit for your horse? Host or participate in a bit fitting clinic!
