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View All / ACCESSORIES / BOTTLES, CAGE & HYDRATION
Black Inc OSTRO Aero Bottle Cages

Black Inc OSTRO Aero Bottle Cages

More than bottle cages — aero devices engineered for the OSTRO.

(only Hong Kong) free shipping on orders over HKD$300 on order

(outside Hong Kong) free shipping on orders over USD$300 on selected categories

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Description

Developed exclusively for the Factor OSTRO platform, the Black Inc Aero Bottle Cages are not just functional bottle holders but integral aerodynamic components. Unlike other aero cages, they don’t require proprietary bottles or special attachments, offering maximum efficiency with standard bottles.

Downtube Cage: Bridges the gap between the downtube and the bottle, extending flow attachment and reducing localized drag while securely holding your hydration.

Sprint Cage (Seat Tube): Functions as a high-speed flow management device. Its foil profiles and precise spacing funnel air tightly across the seat tube and into the rear wheel. When the bottle is ejected before the final sprint, its aerodynamic benefit is maximized — giving you a decisive edge in stage finishes or town line sprints.

 

Combining practical bottle storage with aerodynamic optimization, these cages complete the OSTRO’s performance package.

 

FEATURES

OSTRO-specific design for seamless integration with Factor frames.

Aero efficiency: Downtube cage improves flow attachment, Sprint cage optimizes airflow at high speeds.

No special bottles required: Works with standard bottles.

Dual purpose: Secure bottle retention and aerodynamic performance.

Shipping & Payment

Delivery Options

  • SF Express (Commercial and residential address)
  • S.F. Express - Store Pickup
  • S.F. Express - EF Locker Pickup
  • S.F. - Business Station
  • Pickup at store (Hong Kong)
  • International Shipping (Taiwan)
  • International Shipping

Payment Options

  • Credit Card (*Tap & Go available)
  • PayPal & Credit Card
  • Apple Pay
  • Google Pay
  • Alipay (HK)
  • Alipay (China)
  • WeChat Pay
  • FPS
  • Bank Transfer
  • Pay at store
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