Cirrus Kinekt Suspension Seatpost - Aluminum 31.6 420mm XR- 180-320lb Rider BLKCirrus Kinekt Suspension Seatpost Aluminum 31. 6 420mm XR 180 320lb Rider Black. The Kinekt Active XR Aluminum Suspension Seatpost is sleek and versatile providing 35mm travel with pre load capability to effectively isolate your body from surface vibrations and impacts. XR post is rated for riders 180 320lbs and includes springs for a 190 240lb rider. This isolation improves comfort control and confidence which ultimately leads to a more enjoyable