RACE FACE AEFFECT R DROPPER POSTUP, DOWN, UP, DOWN, UP, DOWNDropper posts are almost a necessity when it comes to mountain bike riding. You'll be hard-pressed to find a new mountain bike without one. When they first came out, they were pretty pricey, but now they are becoming more budget-friendly. The Race Face Aeffect R Dropper Post is budget-friendly and a rock-solid option for riders wanting a simple, trouble-free dropper post. It has a sealed damping system and is made of 7075 aluminum that is lightweight and durable. It is cable-actuated and has a hydraulic cartridge with infinite adjust within the travel. The cartridge system is extremely reliable and easily serviceable. ARTICLE: HOW TO BUY A DROPPER SEATPOST > Features New Du Bushing in the upper nut and increased upper tube diameter that improves the stiffness and durability Uses standard shift cables as well as shift housing Cable actuated so you never have to bleed the line A cartridge system that is reliable and easily serviceable Infinite adjust within the travel Specifications Available Travels100, 125, 150, 170mm Available Diameters30. 9, 31. 6mm Offset Zero Offset Cable Routing Internal Lever Type1x Lever Included No Intended Use Trail, Enduro, All-Mountain Claimed Weight638g (31. 6x170mm)In the Box Seatpost, Cable Bushing, Owners Manual Useful Links-Key Measurements A: Travel100mm125mm150mm170mm B: Overall Length323mm378mm425mm465mm C:Max. Insertion Length-D:Min. Insertion Length-E: Usable Height- | Race Face | Aeffect R Dropper Post 31. 6Mm, 150Mm | Aluminum