DetailsPCS-9:~ Three-point leg system creates stable base. Height adjusts from 39" to 57"(99cm to 145cm). Screw type clamp adjusts to fit tubes of various shapes from 7/8" to 3" (24mm to 76mm). Clamp rotates 360 degrees for easy access to any part of bike. Will also clamp on aero shaped seat posts. Legs fold upward for easy storage. Loosen the lower bolt on the primary tube, and lift legs upward. The PCS-9 works well for many recumbents and bikes with odd shaped tubing.