Signature Arm Cups Options:Open Back Signature Arm Cups or if you cut one

or if you cut one too short and now need additional length

making them the most universal cups on the market

and other aero bike accessories

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

ensuring secure retention and easy access

Signature Arm Cups Options:Open Back Signature Arm Cups or if you cut oneSignature 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