OneUp V2 210 mm Dropper Post Reviewed

Photos AJ Barlas (unless noted)
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I wrote about the OneUp Dropper V2 - with the longest drop of any post available at 210mm - in the write up of my Yeti SB150 test sled earlier this year, but after several months on the product it's time to make bold pronouncements.


I managed precisely zero hours on the OneUp lever (the is AJ's), but reports are good.

As I mentioned earlier, to begin with I wasn't so sure about the 210mm drop. I was very sure 170 was my sweet spot but I was self aware enough to realize I'd come to the same conclusion at 125 and 150 and never looked back after leaving those behind forever. I liked being able to pedal sitting down with relative efficiency and there are times when I appreciate the reference provided by the saddle resting against my inner thigh. Another fear was realized when I buzzed my ass crack on the tire on my first ride, something that was impossible with a 170mm.


The OneUp Dropper V2 has been living on this Yeti SB150. The shorter seat mast makes it an excellent companion to this post compared to previous Yetis.


I have been using this XTR 9100 remote for most of the test interval. Photos - Cam McRae

If I had decided to reduce the travel, to 200 or 190mm, it would have been an easy job. In fact it's a tool-free procedure and I did everything but add the shims required while performing some maintenance on the post (more on that below). It took all of 3 minutes. The ability to customize the drop is one of several features that set the V2 apart from most of the competition.

Other best in class features include the lowest stack height of any post on the market, meaning smaller riders can access more drop when their post is slammed, and the shortest overall length, making longer drops even more compatible with smaller frames. In part this was accomplished by OneUp designing their own cartridge rather than using the Wintec version favoured by so many other brands. This proprietary mechanism is easily user replaced and will set you back only 79 CAD (60 USD). Every element has been chopped but the drop rails of the saddle clamp are perhaps the most clever and likely make the biggest difference.

drop_chart_grande copy.jpg

All the relevant stats.

While we are talking price, OneUp's second dropper will cost you 'just' 263 CAD or 199 USD. This is in the ballpark of some other brands' bargain posts, but this is no price-point product. If you'd like to spend even less, the V1 post is currently available everywhere except Canada (where it's sold out) for 99 USD. Part of what makes these prices sound too good to be true is what's missing; the actuator. OneUp was generous (and confident) enough to provide the option of buying their posts without their lever, assuming the stand-in clamps the cable at the head end. Unfortunately someone nicked the OneUp lever out of the parts room, and I started out using the XTR lever, so I haven't tried it yet. It looks nice however and is available in virtually every direct mount option there is, including Shimano's I-spec II and I-Spec EV and can be yours for 65 CAD or 49 USD..


I love OneUp's attention to detail. Is it necessary to have the parts that rarely see the light of day anodized green?


It's not but it looks great and I appreciate the attention to detail.

After finishing swapping out XTR Trail brakes it was time to get back on the Hayes Dominions I'd only had a few rides on in the spring, which meant I couldn't use the Shimano XTR I-spec II lever (which was excellent) any longer. Luckily I had a PNW Loam lever to swap in and it's been great. From what I've seen the V2 lever (the carbon version is gone) is light but sturdy and the action, which I checked out on a buddy's bike, feels really positive.

The uppy downy function of the post works pretty well too. You'll notice it takes a little longer to compress 210mm, but it happens smoothly and without fuss. The elevating portion of the cycle also works as expected and can be adjusted with the Schrader valve (between the seat rails under a rubber cover) to the recommended 250-300 PSI. Mine was a little slow initially but it got faster before I ever had to boost the pressure. Until it got slower that is...

drop_chart_grande copy.jpg

I could tell you the V2 performed flawlessly, but I'd be lying. After about 4.5 months of heavy use, including haphazard post ride sprays with the hose, the post became grumpy. And then it got even grumpier, with very slow actuation and a reluctance to return to full height. I knew the post required a little maintenance, I just wasn't aware how it was executed at that point, but I was very pleasantly surprised.


The drop clamp reduces stack height and total length.


The clamp works well and hasn't creaked at all. A bonus is there are enough threads to swap saddles without having to disassemble the entire clamp.

As I mentioned earlier, the maintenance procedure is incredibly fast and east and it requires no tools at all. I simply unscrewed the collar, applied some grease to the bushing, and screwed things back on. It's been trouble free since then, aside from the slight side to side play that's developed. It's never noticeable on the bike but if I grab the saddle it feels a little rattley, without making any actual noise. As it gets worse I'll be able to pick up a rebuild kit, with a new colour, anti-rotation pins and both upper and lower bushings, for just 20 CAD/15 USD. Despite the great bargain, mine would need to get much worse before I'd consider the rebuild, and I want to see how long it'll go as I continue to treat it badly.

Other performance notes are, no slowing of action in sub-zero temperatures and if something happens to your cable or actuator it's possible to manually raise and lower the post by pulling it from your frame and manually activating the actuator's action. Actually!


Tool free maintenance is a nice treat.


Once the post becomes grouchy, a little grease applied to the upper tube and bushing gets things working smoothly again. A little lube residue on your post is normal.

It's really hard not to like this product. It was easy to install, virtually every small part is replaceable for a great price, performance has been great and drop, stack and total length are all best in class. Add that OneUp is a tiny local company made up of some rad gents who love riding bikes, and you've got a winning formula.

You can order a OneUp Dropper online from all over the globe and have it shipped from the same side of the globe. It's available in 30.9, 31.6 and it's one of the few you can get in 34.9 as well.

A note on actuator V2 vs V2.1 from Jon Staples at OneUp

The motivation for the original V2 was to minimize the actuator length and centralize its position so that it was unlikely to cause a limitation of the depth that the post could be inserted. The limitation of this design is that the housing needs to be able to move 4mm (the cable is static and the housing moves towards the post when actuated). This is no problem on 99% of frames with internal routing.

Santa Cruz have used tube-in-tube for a while now but starting with the newest Bronson, the pathway got very tight. That coupled with the relatively short frame insertion depth and the fact that the housing enters the seat tube on an angle, leaves little to no room for housing movement. Even the Nomad 4 with a similar shock layout had much more housing movement so the Bronson caught us off guard. The V2 is not incompatible per se but it meant that the seatpost actuator needed to be 100-120mm from the bottom of the seat tube, thereby limiting drop options. A free V2.1 add-on has been available on our website for SC owners since launch.

The V2.1 uses a more traditional static housing, moving cable setup. I was hesitant to use this setup originally because they are typically 10-15mm longer. Once we knew we had an issue with SC bikes however we had no choice. We managed to redesign the setup without adding any extra length and are patent pending on the unique configuration we came up with to do so.

Addendum by OneUp's Sam Richards: The only thing to note is that Jon downplayed the actuator he designed! It was very challenging to manage to make the V2.1 the same length as the V2. Last year we thought it was impossible, which is why wewent with the original housing actuated design. The V2.1is still the shortest actuator of any dropper post out there.

You can purchase a V2.1 actuator in the OneUp small parts store.


The newest version (V2.1 as seen at left above) is shipping with all current posts.
Cam McRae

Height - 6'/183cm (mostly legs)

Weight - 170lbs/77kg

Inseam - 34"/86cm

Ape Index - 0.986

Age - 57

Trail I've been stoked on lately - Boogieman

Bar Width - 760mm

Preferred Reach - 485-500mm (longer with 27.5 wheels than 29)

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+4 Cam McRae dave_f Cr4w Angu58

I ran one of these for about 6 months and had a lot of problems with it. 

Similar to you, the post seized and quit working after about 3-4 weeks and a few wet rides. Upon disassembly, I found the post had ingested water and mud. After cleaning it, it continued to work for a while longer, but developed an insanely annoying rattling sound from the cartridge rumbling around inside of the stanchion. After spending several weeks thinking my links were falling apart and diagnosing everything else on my bike, I realized it was my seatpost. About 3-4 weeks after that, it seized again. 

OneUp support is really really good, but I had this post for 6 months and had to disassemble it 4 times. The cartridge rattle was apparently a manufacturing defect due to a missing plastic piece on the cartridge and they had me wrap it with electrical tape, which solved the problem, but was annoying none the less. Eventually the cartridge failed, but they sent me another one to replace it. 

I am glad to see they did away with the o-ring, that thing was annoying and would inevitably fall down the housing and require fishing around in my frame. It doesn't help that Transition, for some reason, doesn't use fully internal routing, so that o-ring could fall all the way to the BB or get tangled up in the silencing kit on the housing on my former bike. 

If you ride in dry conditions a lot, you may not have any issues, but we ride in the wet pretty frequently and this post is just not sealed well enough to do so IMO. I like that OneUp is really easy to deal with and their customer support is some of the best I've dealt with, but having to disassemble your post so frequently isn't fun, even if they did make it easy to work on.



I had a V1 170 post and it seized up after a couple months of use in sloppy conditions. I emailed OneUp and they quickly sent me a new upper bushing free of charge, which popped in without needing to disassemble the post. That solved the issue, and post was flawless after that over 8 months of use before I sold the bike.

I now have a 180 V2 on my new bike, and the action feels smoother than the V1. As said above, they now ship standard with the V2.1 actuator mechanism, where the cable moves instead of the housing. I have only had the new post for a week, so I can’t comment on durability.



For me the rattling was a dealbreaker. I switched to a 200mm Reverb which has been totally fine.


+1 grambo

FYI - if you buy a One Up dropper now they are shipping V2.1. The actuator head is different and there is no o-ring. Not a big deal, but I did spend 5 mins triple checking things when the install instructions didn't match the parts I was looking at. The actuator head looks even lower profile on V2.1 so I assume changes were made to simplify and possibly increase insertion depth.

I haven't had it long enough to really say much beyond it works well and is so much better than the 5 year old Reverb it replaced.

+2 Vik Banerjee grambo

That info is now listed at the bottom of the article.


+1 Cam McRae

I have two friends who run the V1 and had similar issues (slow/no return) within the first 6 months. Luckily the fix/rebuild is easy. 

I bought one as a spare since the price is so low. Compared to my crankbrothers posts, the return is faster, but the locking mechanism and overall function feel less refined. It’s a small difference, but noticeable. For the price I’d still recommend it- just be willing to rebuild a bit more often than other more expensive posts. 

I love the simplicity of adjusting the travel. I also love the minimal packaging and the fact that this is offered as ‘post only’ without the lever.


+1 Cam McRae

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I don’t see 34.9 offered on their website.


Strange. The option comes up for me. Perhaps it's sold out where you are, since OneUp uses local warehouses?


+2 Cam McRae ohio

The option is there on all drop downs worldwide now.  They will show as SOLD OUT for about he next 36h in the US and International stores while the software syncs.   You can sing up for an in stock notification and you'll here as soon as they are ready to ship, again that is by Friday of this week.

Canadian store is fully operative.



Bought the 180mm V2 when it came out. Has been the best post I have used to date.



Cam, so now that you have a good amount of time on that big of a drop post, is that your new preferred length or will you be going back to a shorter drop post?


I think I'd be fine with 200mm but having all that space - on steep trails or ones that require a lot of body english in particular - is addictive. Tough to go back now.


I have added info on the V2.1 actuator from OneUp at the bottom of the article above.



Got a 180 v2, really nice post for the money, but straight away it was very hard to compress compared to the fox transfer I had before it. I pulled it apart and it was bone dry inside, some lube helped a bit but it’s still harder to compress than anything I’ve used aside from an older reverb. 

I haven’t had a ton of time to look into it more, but it seems like there is a restriction on how much air can escape through the v2.1 actuator. 

Still a great deal overall but I’d pay more for it to be easier to compress!



I just got a V2.1 x 180mm dropper from One Up. It's going up and down the same as my other droppers. There may be something else wrong with the one you have.



On my three bike I have a V1 170, a V2 210, and a fox transfer factory 150. 

The V2 is better than the V1 but neither has the "Swiss watch" feel that the fox does. Not even close. 

I totally agree with trustywheels, I'd pay 400-450 bucks for a smoother version. 

I buy them for the low stack height despite the fairly mediocre action. 

I actually might swap the 210 for a fox 175. It's my hardtail that has the fox on it and every time I ride it I'm reminded of just how much smoother that post is. 

Will see how the V2 does in terms of maintenance needs. I have about 6 rides on it and it's ok at this point. The V1 needs a re-lube about every 6 rides.


Maybe it needs a little lube already? Mine works easily as well as any Fox I have used and is butter smooth.



My 210 started rattling after some time in the bikepark. The reason was, when I attached the shock pump to check the pressure, the schrader valve came loose and after a while it started rattling. Would be great if the schrader valve had a nut to secure it.

No other issues so far, but I dont ride in the mud if possible. Have it for 6 months now, V2 actuator (when I unpacked it the post slipped out of the box and landed on that flimsy V2 did not break but bent, but it works anyway).


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