The Rainer dropper post has earned a solid reputation for consistent, reliable performance, so rather than changing the formula entirely PNW opts for some minor refinements that make this third-generation the best one yet. Travel is increased, and the travel is now adjustable in 5mm increments so you can fine-tune the fit if your ideal travel is somewhere between 170 and 200mm. At the same time, the post's total length is shortened, which is always a good thing--especially for bikes with interrupted or shortened seat tubes.