Triangle Reins: For a Healthy Forward-Downward Stretch

Triangle Reins: The Guide to a Relaxed Outline

Triangle reins – also widely known in classical dressage as Vienna reins or functionally described as sliding side reins – are among the most valuable and horse-friendly auxiliary reins in equestrian sports. Their main goal is to show the horse the way into a healthy forward-downward stretch. If the horse raises its head, it feels a gentle restriction; however, if it relaxes and lowers its head, the sliding rein immediately yields and rewards the horse with complete freedom in the mouth.

Design and Correct Adjustment

Triangle reins consist of a strap that is attached to the girth between the front legs. From there it splits into two straps (like a fork). These two straps are fed through the respective bit rings from the inside to the outside and then attached to the side of the girth (or lunging roller). This creates the eponymous triangle shape. Important: The side straps should be attached approximately at the height of the point of the shoulder. The higher they are buckled, the more collection is demanded from the horse.

Ideal for Lunging and Beginner Riders

Because the triangle rein frames the horse laterally while leaving plenty of room downwards, it is the classic auxiliary rein for lunging. It helps the horse to round its back and find a steady rhythm. It is also indispensable in riding lessons for beginners: The rider can concentrate entirely on their seat, while the sliding side rein provides the horse with a steady, soft contact.

Frequently Asked Questions

What is the difference between triangle reins and side reins?
Normal side reins are simple, straight straps that do not allow any lateral or downward movement – they fix the head in a certain position. The triangle rein (or Vienna rein), on the other hand, glides through the bit rings and allows the horse to use its neck as a balancing pole and stretch downwards.

How long should triangle reins be adjusted?
The length is correct when the horse steps into the contact with a normal neck posture (nose roughly at the height of the shoulder joint) without the forehead line being pulled behind the vertical. If the horse wants to lower its head to graze, this should be almost possible.

Can I jump with triangle reins?
No. Over the jump, the horse needs absolute freedom to stretch its neck forward and upward to bascule and round its back. Any auxiliary rein attached to the girth (except a running martingale) is strictly forbidden and extremely dangerous when jumping.