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Telescopic seat posts are probably one of the greatest achievements of recent decades for mountain bikers. But sometimes these little helpers can be sensitive. In our last issue of EMTB, we reported on our long-term experiences with the electronic Reverb AXS (800 Euro >> e.g. at Rose for 579 euros) from Rockshox. Our tester had the noble piece in hard continuous use. In the heat of the moment, he kept grabbing the bike by the retracted seatpost, for example to lift it out of the car. This is not good for many hydraulic dropper posts. Lifting or even hanging up (see picture below) on the retracted saddle creates negative pressure in the system, which can cause air to enter the system in the long term.
The Reverb in the test acknowledged this after a certain time by regularly pulling air. Rockshox speaks of incorrect operation and expressly points out that bikes should never be lifted with the saddle retracted. This applies twice as much to heavy E-MTBs!
We are of the opinion that this happens from time to time in everyday life. Incidentally, some manufacturers counter this problem with a mechanical solution. Fox allows lifting on retracted transfer stands for example, explicitly. Also the Eight-pin construction locks mechanically and therefore cannot draw air. Rockshox has given its Reverb a quick air vent which quickly solves the problem. Nevertheless, if you want to enjoy your seatpost for a long time, stay away from the worn saddle.
Florentin Vesenbeckh
Editor CvD
