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OnlyMotion is Launching an Electronic Conversion Kit for Dropper Posts

Mar 12, 2025
by Palardy  
Editor's note: We don't typically run articles featuring products that are still in the crowdfunding stage, since there's no guarantee they'll make it to production. Still, this conversion kit from OnlyMotion seemed worth a post, in part for the conversations that are sure to ensue. The kit can convert a cable-actuated post to an electronic one, although it does add length to the bottom of the post, and OnlyMotion suggests running the charging cable through the frame, which seems like an extra hassle for a wireless system. What do you think? Are cables really that hard to deal with? - Mike Kazimer



PRESS RELEASE : OnlyMotion

Bringing Instant, Intuitive Control to Your Ride
OnlyMotion, an innovative Canadian cycling technology company, is launching a game-changing wireless electronic conversion kit for dropper posts. Designed for seamless, maintenance-free operation, this revolutionary system lets mountain bikers upgrade their existing dropper post with instant, effortless wireless control.

OnlyMotion s actuator

Faster Than Mechanical – Ultimate Control at Your Fingertips
OnlyMotion’s wireless remote outperforms traditional mechanical setups. Press the button, and your dropper responds instantly. Less thumb pressure means better grip, improved bike control, and enhanced safety, especially in high-speed or technical sections.

Here's how it works.
The compact, patent-pending actuator integrates directly into the seat tube, shielding it from dirt, water, and trail abuse, ensuring long-term reliability in all conditions.
Charging is just as effortless: USB-C quickly charges the system in under 10 minutes, whether from a phone, a power bank, or your car. One charge grants up to 150 hours of riding time so riders can focus on their ride instead of battery life.


OnlyMotion s actuator

Key Features & Specifications
- Compatible with Fox Transfer, Bontrager Fall Line, Race Face Turbine R, OneUp V2 & V3 (With more to come!)
- USB-C charging: 10 minutes = full day of riding
- Up to 150h of riding per charge (4000 actuations)
- Ergonomic wireless remote with instant response
- Sleek, in-tube design – IPX7-rated weatherproof & maintenance-free
- Powerful brushless motor – high efficiency & durability
- Lightweight design: In most cases, no additional weight vs your mechanical setup
- Operating temperature: -20°C to 40°C (14°F to 104°F)
- Price: Starting at $174 USD (Kickstarter Early Bird Pricing, limited availability)

Support the campaign here: https://bit.ly/3QVMInX

OnlyMotion s dropper post conversion wireless remote

Kickstarter Launch: Early Backers Get Exclusive Pricing
- With over a year of development and rigorous testing, OnlyMotion’s wireless dropper conversion kit is ready for production. Test riders have pushed it to the limits: rain-soaked trails, dusty descents, and rugged terrain, ensuring top-tier reliability and performance.
- We've designed this system to withstand the toughest conditions. Our riders have tested it in every scenario imaginable, and it hasn't let them down. We believe this game-changing product is set to make waves in the mountain biking community.
- Exclusive Kickstarter Early-Bird Pricing: Starting at $174 USD
- Limited availability – Secure yours now!

About OnlyMotion
OnlyMotion is a Canadian company dedicated to revolutionizing the cycling experience through high-performance, innovative solutions. With a team of experienced designers and engineers who have successfully launched a wide range of high-tech products, OnlyMotion is committed to creating cutting-edge technology for outdoor enthusiasts. Driven by a passion for cycling and a relentless pursuit of quality, OnlyMotion delivers products that enhance reliability, performance, and user satisfaction.

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107 Comments
  • 9421
 Literally worst from both ends:
- MUCH bigger insert depth
- cable routing either way
- charging required
- no replaceable battery
- no fast-swap possibility to a different dropper post

The biggest advantage of wireless dropper post is that it WIRELESS. And can be installed and replaced with ease. This is quite an opposite of that.

Aside of that I've never felt that I need quicker remote for my dropper post.
  • 62
 ++
  • 241
 Yea, wait, wtf? That's just a regular dropper with extra steps...
  • 132
 Also , added weight
  • 92
 Yo negproppers, read carefully, this cable you need to route through the frame is not just charging port, it is a wireless antenna, so you have to route it outside the frame always. So you are still routing cables...
  • 20
 I thought it said that the remote was wireless.
Seems like the dangly bit might just be an antenna?
  • 264
 I actually don't hate it, I feel like this could be cool if the battery lasts awhile and the extra length doesn't interfere with how slammed I wanna run the dropper. I dont really wanna take my post off every other day to charge it tbh. But it's def much simpler than adjusting/cutting cables and the tension, internal routing, pulling the post, etc that comes with an internal routed dropper.
  • 62
 Seems like you can charge it from the actuator/trigger, so dont have to remove it, but need the bike close to an outlet, or have a powerbank
  • 25
 @lennartkung: No, actually two different units to charge. Still, if you're prepared for batteries on your bike, that's not such a pain. It's like charging phone + earbuds.
  • 102
 @mwysel: You charge both at the same time with only one USB-C cable. We know it's not that clear for now and we are working on providing more details. Thanks for the interest !
  • 71
 maybe a good solution for the bikes (mostly XC) that only have 1 or 2 ports for wires and now you're not forced to choose wireless drivetrain or wireless post. Also, this plus a OneUp v3 could be a lot lighter than current wireless posts.
  • 20
 @OnlyMotion: Could you run an inductive charging clamp on the frame? Stop the need for cable routing or post removal? At least for carbon frames?
  • 61
 I think this is really innovative, maybe it's not perfect but it's really good to see an independent setup putting a meaningful product forward. Unlike, say, a 450 dollar bukkake bag?
  • 164
 This is pretty danged genius, and good for them coming up with the product. I wonder if that little receiver antennae is gonna raddle like a mofo though? A little steep price-wise, but it's cheaper than a dedicated electronic dropper.

Hmmm...I wonder if this could be a net savings...one seat post for both my bikes since it can be easily swapped?
  • 40
 A standard post is really easy to swap as long as you leave enough slack. If you don't have enough you need to loosen one extra bolt to remove the lever from the bar. You just press the actuator with your finger and pop the cable end out. Or just buy an entire second post for the price of this.
  • 41
 Isn't that a cable connector rather than an antenna? This is just electronic, not wireless.
  • 131
 Gotta say, came here to munch on the hate-flavored popcorn, but turns out this is not an automated hydration pack.

I love the idea of retrofitting my perfectly good dropper instead of buying a new one. It's also cool these guys have made 3D printer file available on their kickstarter site that you can use to see if would work with your frame setup:

www.thingiverse.com/thing:6955068

(Looking at you, @brianpark)
  • 80
 Kind of cool but your now adding 2" or more to the bottom of the post limiting the dropper travel. Frames with bent seat tubes(lots of these) where you are able to use a 180mm will now be 150mm......Don't see that as a positive
  • 45
 Whether you add that extra length to the bottom or the top (AXS) the middle (fox) does not matter.
That actuator length will add to the total length regardless. Nowadays seattube length is mostly not the concern. Insertion is. And so the total length has become more important than stack height. That was different a couple years ago.
That being said, I expect the shortest e-dropppers remain longer than the shortest mechanical ones for some time.
  • 10
 @sackifrombikeyoke: I'm not sure what the internals of the fox posts look like but could you not optimize the externally routed cable designs (for example PNW cascade) to have comparable insertion depths and collar heights to existing internally routed droppers?
  • 61
 @CobyCobie: It may not look like it, but externally routed posts like the cascade or KS LEV still have a bottom actuator that is about the same length as a normal actuator:
youtu.be/iaoweE8ZRaQ?si=3yCdFOek2jOsTp86
It's just hidden under an extra cap. The length is there.
  • 11
 @sackifrombikeyoke: Wouldn't it be possible for externally routed dropper posts to have more or at least as much travel as the internally routed ones do? Insertion depth isn't that big of a deal in my case as my frame has a straight 400mm seattube. Internally routed droppers can never slide all the way down inside frames as the bottom of the post can't travel past that cable port, but that is no issue with externally routed droppers. So yeah, is there anything keeping companies from producing externally routed droppers with more than 175mm of travel?
  • 10
 @vinay: I don't see a reason why they could not have same drop as internally routed designs.
Vecnum's Movelock, in fact, was the first 200mm dropper ever, if I remember correctly:
www.vecnum.com/de/produkte/moveloc
What's keeping a lot of companies from making these is that virtuallyevery frame now has internal routing. And external routing is more complicated abd requires more parts.
  • 10
 @sackifrombikeyoke: Thanks, I wasn't aware of that Vecnum product so great to hear. I consciously avoid internal routing for anything (cables and hoses) on my bike for several reasons so good to see there are alternatives out there.
  • 10
 @sackifrombikeyoke: I am aware, in theory this could be made a bit more compact than internal routing as long as the collar height can be kept down.

Do I think it's worth doing? Only to sell to suckers who think electronic always = better.
  • 90
 But I like having my dropper slammed to the max insertion depth...
  • 130
 It's not for you then
  • 60
 Manufacturers are going to have to collectively get their act together and make more bikes with more post insertion. A seat post shouldn’t bottom out 150mm+ above the bb, yet 90% of bikes do
  • 112
 Uplifting product
  • 70
 With the popularity of downtube storage, the charging cable inside the frame doesn't seem like that big an issue
  • 70
 Makes you wonder why the RockShox and Fox droppers are $600-$1k if a small company can market the electronic piece at $174
  • 50
 Fox and Sram employ a lot of highly paid engineers, have office space to rent, production costs, lawyers....
  • 40
 Looks better too!
  • 30
 @Simann: They also have economies of scale allowing them to design, produce, distribute and sell at a much less cost per unit. Hopefully this product indicates wireless droppers price point will "drop" to $100+ current mechanical droppers. They should sell this tech directly to the dropper manufacturers rather than go the consumer route.
  • 41
 never thought that would be intrested in wireless dropper. BUT...
After experience with fullsuspension MTB rentals and way worse eMTB rentals I kind of understand this...
tried everything... Jagwire dropper SL cables just explodes after several months or half year. standard cable gets pinched with battery/motor or even non ebike stupid designs doesn't allow easy sadle adjust...

one day going wireless... but not yet probably
  • 41
 Yeah that wireless thing would be great. But in the video it looks very much like a wired electronic post. So no improofment in that case.
  • 10
 @hermes1987: The charging cable is connected to the remote only for charging. The USB-C charging port is located on the remote, and once plugged in, both the remote and the actuator charge simultaneously. The rest of the time, the charging port is essentially hidden inside the frame
  • 41
 I have no interest in electronic *anything* on my bikes, but I am curious how they came up with the figure of 4000 actuations in 150 hours of riding. This comes out to one actuation per 2 m 15 s. Just wondering where this statistic came from. Of course actual frequency of activation will vary hugely between a "winch and plummet" style ride versus an XC trail with a lot of up and down.
  • 10
 I definitely use my dropper 40ish times or more on my 1-2 hour rides. I probably use the dropper more than I shift gears.
  • 27
flag hermes1987 (Mar 12, 2025 at 22:41) (Below Threshold)
 @Klimbnbike: So you use your dropper every 3 seconds. Doesn't seem like an enjoyalble ride for me...
  • 50
 @hermes1987: that is actually every 90 - 180 seconds (ish).
  • 72
 Good for a lot of ebikes where the cable is routing sucks or is pinched by the battery.
  • 20
 I'd actually be really stoked on it if you tee it off of the display wire on the Shimano motor so it could work using the bike's battery.
  • 10
 @succulentsausage: That's a great idea. Shimano drive units already have extra power ports for accessories.
  • 52
 I was considering making one of these myself but this looks like a decent option. Dropper cables are my least favourite to route and 150 hours is a decent amount of battery life.
  • 94
 But you will need to route this one anyway
  • 20
 @sayrius: exactly.
  • 101
 @sayrius: You don't have to route it. Their promo vid just shows it routed because most non-Pink bikers would complain at having to remove a SP to charge it.
If you're handy with an Allen key and a led pencil (for marking SP insertion) then just slide it out once every 150 hrs. No big deal.
  • 31
 @mwysel: Is that so? Do they say somewhere that the function is same whether you usevl the charging cable or not? I'm wondering if that cable is only for charging, or if it's also for signal.
Because, quote:
"The compact, patent-pending actuator integrates directly into the seat tube, shielding it from dirt, water, and trail abuse, ...."
That actuator inside the seattube is not only shielded from those...
  • 32
 @mwysel: The nylon braided sleeve we selected slip way better than a regular cable, it is very quick to route.
  • 72
 @OnlyMotion: I'll ask directly, because it seems like you accidentally overlooked my question or didn't see it as a question: Does the frame routed cable only serve a charging purpose or is it also for signal?
Would the post function the same if you decided to forgo that cable?
  • 21
 @mwysel: but how it will maintain a signal through a frame?
  • 10
 @sackifrombikeyoke: I dunno, but if you watch the beginning of the promo video it looks like it actuates without being connected to the remote
  • 10
 @sackifrombikeyoke: This is what I want to know.
  • 40
 I would rather forgo the cable and just take the dropper out to charge it.
  • 62
 @geephlow: Of course it does. That's not in question. The question is:
Does the post operate properly, if that charging cable is not routed?
Does the post work as intended without that cable?
@OnlyMotion?
  • 51
 @Caliwcm: I believe to know the answer, but believing is not knowing.
@OnlyMotion ?
Some people seem to have the same question. Can you clarify?
  • 42
 @sayrius:
Since this question is being evaded, I'll make a bold guess:
You need to have the cable installed. The cable is for power/charging and it is transporting signal at the same time. Without this cable the actuator unit could not get the signal out of the frame - or at least only very unreliably.
  • 40
 @sackifrombikeyoke:

It’s not clear indeed. I’m sure they’ll get this clearer.

The remote is wireless to pass signal to actuator.

To charge the battery’s actuator and remote in same time, the cable’s connector that sticks out frame’s dropper cable port needs to be pull out and plug into the remote. Then usb-c cable can be plug into remote in a second plug in and both actuator’s and remote’s battery can be charge.

That’s the way I understand it from Kickstarter info.

Imo its pretty clever. No need to remove the post to charge and can get this thing some juice via cellphone or powerbank for extreme necessity.

Also, if routing the cable is an hassle for you or for the frame you got, at least you do it once for the whole lige you want to
Use that retrofit wireless actuator.
  • 20
 @sackifrombikeyoke: You would be correct, they divulged that on their MTBR thread here:
www.mtbr.com/posts/16405254
  • 91
 @gasmanxj: Thank you for clarifying.
So to wrap it up for everyone wondering:
A cable needs to go from post end through the frame all the way to the cable exit at the head tube. Just like a regular mechanical dropper cable.
This in not because of charging, but because that cable is the antenna. The signal simply can not got get out of the frame without that antenna.
The charging port is a secondary use for this cable. Primary function the antenna/signal transmission.
  • 30
 @gasmanxj: So according to this it is required for communication because wireless signal cannot penetrate the frame reliably... So this is just MEH, a half-wireless post which you still NEED to route cables, just not to the handlebar. And what with headset routing?
  • 40
 @demojo: From the Kickstarter page...

'Do I really need to install the actuator's charge cable?
Yes, installing the charge cable is recommended for reliable performance. It ensures proper signal transmission and allows easy access for charging. While it might work without it, we cannot guarantee consistent functionality.'

so its electric and sort of wireless, but not really wireless, because they 'cannot guarantee consistent functionality'

Also seem to be avoiding the direct questions...
  • 20
 @kev-jones: yes, essentially an electronic wired seatpost actuator.
  • 10
 @sackifrombikeyoke: Yes, in some cases, removing the dropper post to charge it might work. However, given the vast variety of bike frame designs, we can't guarantee reliable wireless connectivity without the charging port, which also serves as a waveguide for the wireless connection.
  • 10
 @Palardy:
Good to hear that it might work with some bikes without the cable. Can you name one frame model where you found it to be working?
  • 20
 I actually like this idea. They are making something to work with your current dropper post, not trying to sell you an entirely new thing. Wire is only there so you can quick charge the actuator and lever at the same time with no need have them connected together for use. Want to swap between bikes...just get another charge wire and leave it installed in the other frame.
  • 20
 So what are the advantages to this exactly? Its still wired, and you still have to route a cable through the frame. It adds extra insert depth, so your current post will likely now have to be replaced with something shorter. I have no idea what the target market is for this. Its not wireless, and it gives no advantage over a cable actuated post....
  • 20
 You know who loves this? A shmuck like me who runs moto-brakes and has to deal with single internal cable ports on the right side of the downtube. But if you consider $250 for a cable actuated dropper plus this gadget, how much more for a true wireless post?
  • 10
 Ok. I just want someone to tell me what Fatbike that was in the top vid.

I mean. It’s a cool solution. But…it’s still wired. Now it’s just an electric cable instead of a steel one. But yeah, who knows what bike that was.
  • 21
 Ha, actually started the process of designing and manufacturing a similar doodad but space was so tight I ended up scrapping the project. Ended up adding an inch and a half to the bottom of the post. Don't have that much extra room in my frame so was a no go. Neat to see someone else committing to this. (did go full wireless though so had extra boards in there.)
  • 10
 Wait, so can it run without having to have a cable between them, in other words, wirelessly? (I'm assuming this would require separately charging the remote and post-actuator piece?) The biggest advantage of the electronic posts out there seems to be less about the electronic part and more about not having another piece of wire/housing...
  • 10
 I don´t get it. It would be neat if it would be wireless, but I don´t see any davantege if I have to run a wire insted of the normal dropper cable.
The only thing it does is extending making your dropper inserting length which is already a problem.
  • 10
 One of the best things about a wireless dropper is being able to easily swap it between multiple bikes. They cost a lot more, but if you have multiple bikes, you can get away with having only one post. This design makes that impossible because of the need to route the charging cable through the frame. It seems like it would be pretty easy to simply remove the post to charge it. Does the charging cable also act as an antenna for the wireless signal? It would be great if they came up with a way to easily swap the post between bikes.
  • 30
 you could just buy another charging cable for your other bike and I'm assuming it would be pretty cheap no ?
  • 10
 after reading this on the kickstarter page this makes so much more sense. I support this item fully. (your short youtube video's dont really show whats going on)

I dont think id pull the wire through my bike, ill just pull my post over every few months and charge it.
  • 40
 I believe you should read the kickstarte page carfully, then. Because you must have somehow missed that the cable is mandatory. It's not only the charging cable but also the antenna.
  • 10
 Do you know what? I don't hate the idea... I think a lot of people missed two things, that weren't clear above- 1. it isn't Wireless, and doesn't claim to be. 2. Charging can be done via the remote, which seems like a neat solution without post removal.
I'm not convinced it's going to find a massive market as an aftermarket accessory but I actually hope a brand might buy the idea from them and adopt it in, thereby hopefully reducing the issue of additional post insertion length and maybe polishing it up a bit. I hate servicing my dropper and it frustrates me how often the cable causes issues with certain posts. I ride in frequently mucky conditions and was alarmed to find my cable had completed jammed and post actuator had corroded on a my brand new Oneup V3 before it had even seen out it's first winter
  • 10
 Uh so why did we just make a dropper that still has a wire? Isn't the entire point to be WIRELESS? I really don't see the point in paying almost $200 plus a dropper for this I can get a brand new reverb right now that actually cleans up the cockpit for like $500 I don't really think I'm getting anywhere with this dropper.
  • 20
 Before making or developing anything, one should always ask themselves "what problem am I solving"? If there is not a good answer, then there probably does not need to be a product.
  • 31
 This is an intriguing option for sure, especially when compared to the laughably expensive options that are currently available.
  • 50
 Wireless😂
  • 10
 This was my first thought when I read the title. Make it wireless!
  • 10
 I have been trying to find a way to allow my son's MTB bike to do bar spins without breaking the bank. This would help a bit. Still need a hydraulic gyro that doesn't involve drilling into the frame.
  • 10
 I work in a rental shop, adjusting posts with cables is not straightforward for all bikes and or customers, I would prefer to have wireless posts on all rental bikes, and this looks like a good step in that direction
  • 20
 I really like the idea of this I now need to go measure my frame to see if I have enough room for one of these
  • 10
 I have been waiting for this ever since I started waiting for this. Reminds me that I haven't been this hungry since, well, the last time I was this hungry
  • 20
 It's a good idea I reckon but I'll stick with cables for gears and droppers.
  • 10
 It needs to be compatible with Rock Shox stealth dropper post and the combined total be cheaper than getting an AXS dropper post.
  • 10
 Only up to 104 degrees F? It gets hotter than that here and I expect even hotter inside a metal tube. I better ride faster I guess.
  • 10
 I'd totally buy this, but please get rid of the charging cable. I dont mind removing the actuator to change the battery every now and again.
  • 10
 My biggest gripe is the remote. I want something I can attach to my brakelever, preferably via matchmaker x mount like all other modern droppers.
  • 30
 without wireless this makes zero sense
  • 10
 Saying that this reacts faster than a mechanical one is just lie. It's quite the opposite, while the mechanical has no delay, the wireless one here still has to move a motor.
  • 10
 I'm working on pedals that have location-enabled dynamic Q-factor adjustment.
  • 20
 Stack height lmao….not even mentioned.

More junk
  • 20
 I have been wanting Shimano to make a Di2 verson of this for a while.
  • 24
 Ahhh, you almost had me here:

- I can use my brilliant OneUp dropper
- I'm in the 150-170 dropper camp (and always will be), so never mind the additional insert length
- No awkward looking black boxes hanging below your saddle
- Remote looks good and is easily swappable from one bike to another
- Plus it's Canadian made and we support Canada here, not the US of A (anymore)

But then having to run an additional cable through the whole bike unfortunately ruins my whole purpose which is to be able to easily install, run and swap one dropper on various bikes. Bummer.
  • 10
 I hear you! The good news is that you don’t need to re-route a cable every time you swap the dropper. The charging port cable stays inside the frame, and the dropper post simply plugs into it.

So if you want to use the dropper on multiple bikes, all you need to do is install an extra charging port cable in each frame. That way, swapping the dropper between bikes is as simple as unplugging it from one and plugging it into the othe no hassle at all!
  • 10
 @Palardy: well, you can just do the same with a mechanical dropper, no?
At least the vecnum, Bike yoke and one up I had were all easy to dis/connect if enough slack cable is available
  • 10
 The only reason I might get interested in a dropper post with batteries is if it can move up and down on its own.
  • 10
 This or if saddle angle adjustment ala the Switchgrade can happen with a button on my bars.
  • 31
 A solution in search of a problem
  • 10
 The blockchain of mtb
  • 10
 I don't care about the "benefits", I'm still not buying (or converting) to an electronic dropper.
  • 10
 will wait for the BY dropper solution - hoping that Sacki has downward compatible solution....
  • 10
 WTH! Still cables and wires and have to charge it. Good one!







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