We've probably all talked about it at some point during a ride: Why the heck can't someone make a dropper post that lowers without needing your butt to push it down? Pinkbike photographer Andy Vathis spotted BMC's prototype Autodrop post at this weekend's Lenzerheide World Cup, which looks like it does exactly that.
The Autodrop post uses air pressure to lower the seat when you push the lever, and a coil spring brings it back up.
The Autodrop post integrates with BMC's frame, much like the Race Application Dropper (RAD) on their Fourstroke. And just like that RAD post, the Autodrop sports an oval-shaped upper tube to ensure that everything stays aligned without needing a bunch of brass keys.
Internally, a rechargeable air spring is used to literally pull the post down into its travel instead of the rider needing to push it down with their ass. A coil spring looks after rebound duties, which the air spring would likely need to overcome to lower the seat.
The Autodrop's inflator valve (left) tucks into the side of the frame, and a high-pressure floor pump is needed to recharge it.
The dual-stage remote lever (left). You push the paddle partway if you want to lower the seat with your ass, or all the way if you want it to lower on its own. Part of the valve system (right) that's connected to the flexible air tube and air reservoir.
There's a dual-stage remote lever with a single paddle that controls the post's action, and you have the option of using it as a regular dropper by pushing the lever only partway. Want it to drop on its own? Push the same lever all the way and the seat lowers without needing any assistance. The air chamber is concealed within the frame and can be re-charged with a normal floor pump, and BMC says that it'll hold enough air to last longer than an XCO race. It's still in development, though, so don't be surprised if the production version lasts longer.
Never owned one after the shit storm of f*cked droppers I opted out and my $200 CRC dropper works better
I have the budget CRC 150mm internal drop one that cost £100 in some crazy sale. Its without a doubt the best post I have had outlasting every reverb and mates posts from other brands. Swapped the leaver out pretty quick but otherwise faultless and untouched for over two years of UK weather. Rather a peasant post then a bust posh post
yes?
More complexity! Finally the bike industry is listening to PB comments and giving people what they want!!! THANK YOU INDUSTRY!
This tech is long overdue for those of us with limited vert where rides consist of short ups and downs.
I like my Fox Transfer no issues.
You've never waited with dropping your saddle too long and then was quite busy to "squat it down" while already in need of advanced pilotage with exact body and COG positioning? That's the moment you would appreciate a trigger to force your saddle down without pushing with your ass.
... IMHO
It's definitely doable, but to make it fast, strong, reliable, and a reasonable weight you'd be on a post that costs as much as a frame...
I would be stoked to see an up/down post integrated into a system like AXS or Di2, but it's gonna take an assload of time and money to get right.