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 ride. Includes 2 installed springs (1 upper, 1 lower) and 2 additional springs to tune for different rider weights Specifications Clamp StyleStandard RailsColorBlackDefined ColorBlackDiameter27.2Length420MaterialAluminumMin Height80Offset (mm)12Travel (mm)35Weight661