Bottle Rocket Triathlon Water Bottle Cage and Mount for Aero Bars Secures your bottle between the aero bars for minimal drag. Check out http://www.cervelo.com/en/engineering/ask-the-engineers/hydration-and-aerodynamics.html Unique, adjustable design holds bottles from front and back to prevent launching. Great for adding another water bottle 'cage' when you only have one set of cage screw holes. Lightweight! Only 48 grams including mounting straps and supports bottles up to 70mm in width. Note: To ensure proper fit, there must be at least 75mm between your aero bars. For more info go to bottlerocket.info