TriRig Beta System

The TriRig Beta System is TriRig's rear hydration system, replacing the Beta 45, Beta 63 and Beta One. It carries one, two or three bottles behind the saddle, and TriRig says it can be set up in virtually any configuration, position or angle. Bottle cages and bottles are sold separately.

The choice is the mount. The Saddle Clamp Mount is the heavier option at 303 g for the system and is TriRig's most popular. It clamps to your saddle rails and fits universally, on round or oval rails spaced up to 75 mm. The Direct Mount is 64 g lighter at 239 g and attaches anywhere you already mount a bottle cage. If your saddle rails are the only available mounting point, take the clamp. If your frame has bottle bosses where you want the bottles, the Direct Mount saves the weight.

Both versions share the same Dogbone and Three Face Mount. Each of the three outer faces has a series of M5 threaded holes, and the flat inside face is a fourth mounting surface for an inward-facing bottle or a storage unit. Fine-tooth, double-sided rosettes allow small angle changes, and two M6 countersunk screws set the angle of the whole assembly. The Dogbone is optional; remove it to attach the Three Face Mount directly.

Common layouts are two Kappa Carbon Cages side by side on top, or the same pair with a Kappa Carbon Saddle Cage below for a third bottle. The Beta System is machined from solid aluminum billet, media blasted and hard anodized black, and nothing is 3D printed. TriRig designs and engineers it in the USA.