Is the end of cables near? That might be pushing it a bit, but KS' prototype electronic seat post does away with wires entirely, instead using a wireless remote that activates a piezoelectric motor within the post. It still depends on the exact same internal design found within other KS posts, with the flow of oil moving from one chamber to another to allow it to move through its travel, but rather then a plunger activated by a cable to control the flow, a piezoelectric motor opens and closes a small valve to accomplish the same thing. The prototype pictured here uses a lithium polymer battery, similar to what you'd find inside of your phone, that is tucked into the post's main tube, but KS is investigating using a gel battery that would open up all sorts of packaging options. There is also the possible tie-in with batteries that power electronic drivetrains, something that we'll soon see a lot more of soon, meaning that KS might have the option of eliminating a battery within the post altogether. The topic of battery life is still open ended given that KS has yet to decide what they'll be using to power the seat post, but 60 or more hours of ride time is what we've seen out of suspension forks that use a piezoelectric motor to control its lockout function, so there is no reason why KS couldn't come up with a similar or even more impressive
figure. What happens when the battery dies? This prototype automatically reverts to full extension if its battery runs out of juice, thereby allowing you to pedal out of the bush without wrecking your knees, but maybe not hit any booters on your way back to your truck.
The action is controlled via a remote that will be mounted on the handlebar, and there will be no cables connecting it to the post. That means no frustration while trying to pass an internally routed cable through your frame, and certainly no more external routing that can sometimes turn into a game of seeing how many zip-ties it takes to tame a wayward cable. The quick and dirty remote pictured above is not intended to be mounted on the bar, but rather just to test the post's action, and KS said that they expect the production remote to be quite small in size - picture a lock-on grip collar with a small button on it that can be easily pushed with your thumb. The prototype shown here is the only one in existence at this point in time, and KS is expecting a production version to be roughly two years out, so don't go and sell your cable activated dropper post tomorrow. We're excited for the future, though, and to see how KS develops the concept. www.kssuspension.com