PNW brings you the first ever suspension dropper seatpost. The Coast post has 40mm of air suspension that is sure to smooth out any harsh terrain you may encounter. With up to 120mm of drop, Coast post will also easily get out of your way when you need a low center of gravity. Features: Drop Travel: 100 (27.2) or 120mm (30.9/31.6) Air Suspension: 40mm Available with internal or external cable routing Cartridge: 2-chamber hydraulic and adjustable air 3-year warranty Perfect for commute, gravel or hardtail bikes