Speedfil Z4 Between-The-Arms (BTA) Water Bottle Cage with Computer Mount. Swim Accessories Brand_Sharkbanz it is also a great

it is also a great mounting solution when combined with the Speedfil A2 hydration system

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REAR DERAILLEUR: Shimano

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Speedfil Z4 Between-The-Arms (BTA) Water Bottle Cage with Computer Mount. Swim Accessories Brand_Sharkbanz it is also a greatSpeedfil Z4 Cage is the first cage optimized for BTA (Between The Arms) aero hydration The Z4 Cage works with standard water bottles, as well as the Speedfil A2 to offer several unique and distinct advantages Versatile: The Z4 is lightweight, easily configurable and can be used on any front, frame and rear saddle mounts. Direct Aero Mount: The Speedfil Z4 Cage is designed with numerous ports for a direct BTA mount into the aerobar extensions with a