The Z4 Cage is the first cage optimized for Between-The-Arms aero hydration.

The new patent pending Speedfil 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.

Garmin® Integration.
The Speedfil Z4 integrates a detachable arm which can hold a Garmin® Quarter Turn Bike Mount* to the top of the cage when used in a BTA configuration. This not only saves precious space within the aerobars but also provides easy access.

Data is now where it should be – easily viewable and easily accessible.

*Garmin® Quarter Turn Bike Mount (Part# 010-11430-00) sold separately through Garmin resellers.

Direct Aero Mount: The Speedfil Z4 Cage is designed with numerous ports for a direct BTA mount into the aerobar extensions with a minimum of 4 nylon zip/cable ties. No additional mount or hardware is required.

The ports are strategically placed allowing for multiple positions and variable angles accommodating most aerobars.