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The Ultra Aero Inline carbon seat post features a truncated aerofoil profile that's aerodynamically optimised to reduce drag in the high-speed airflow disturbed by the rider's leg. A composite construction increases vibration absorption, reducing ride for a faster, smoother ride.Only compatible with the Ribble Ultra SL R/ SL aero carbon framesetsDesigned to enhance vertical compliance for a more forgiving ride on broken roadsSingle-side clamp design for quick and secure adjustment7x7mm saddle rail clamp (7 x 9mm carbon rail clamp available separately.