Ergon CF Allroad Pro Seatpost Absorbs Road Impacts If you're looking to lighten up your bike and reduce vibrations for a smoother ride, you might want to get a carbon fiber seatpost. The Ergon CF Allroad Pro Seatpost uniquely combines properties that were previously considered incompatible: Sensitive absorbing response, low weight, maintenance-free and sleek appearance. It absorbs road impacts and works with noticeably more efficiency than conventional spring suspension seatposts. Features Perfectly tuned to absorb road impacts VCLS leaf springs provide a highly sensitive, lively response Perfect for road, allroad, and gravel Max rider weight: 220 lbs No MTB Use Not Shimano Di2 battery compatible SPECIFICATIONSDiameter27. 2mm (Cannot Be Shimmed)Length353mm Offset Zero Material Carbon Fiber Composite Intended Use Road, Allroad, Gravel Weight220g | Ergon | Cf Allroad Pro | Carbon | Leafspring Seatpost 27. 2Mm, 20Mm Offset