Signature Arm Cups Options:Open Back Signature Arm Cups Sigma One is both the

Sigma One is both the lightest and most aerodynamic stem in TriRig's lineup

making them the most universal cups on the market

The Closed Back Scoops not only function like standard arm cups

makes the Kappa Saddle Cage the strongest and most reliable option for rear-mounted bottles

Wingspan Extender Speed Concept: Optimized Specifically for Trek Speed Concept Disc

Signature Arm Cups Options:Open Back Signature Arm Cups Sigma One is both theSignature Open Back Arm Cups: The Ultimate Aero Comfort Upgrade The TriRig Signature Open Back Arm Cups are designed for comfort and performance. Crafted from our ultra strong, lightweight ThermoPlast material, these arm cups offer superior strength and durability at our most affordable price point ever. Triathletes and time trial cyclists who use our Signature Open Back Arm Cups stay comfortable in the aero position longer due to the textured