OneUp 240mm-travel Dropper Post Review

We tested the longest OneUp dropper post with 240mm of travel and we're finally getting as low as we want to go.

Is there such a thing as too much dropper post travel? Most of us would say no, but then again most of us haven’t ridden with 240mm of up-down. As a tall rider I’m constantly on the hunt for a longer travel dropper post, and after testing this one from OneUp, I feel like it’s the afternoon following Thanksgiving dinner: I’m satisfied, and not sure if I could ever eat another bite.

OneUp dropper post specs

OneUp offers just a single dropper post model — the current one officially known as V2 — in three diameters (30.9, 31.6, and 34.9mm) and six travel lengths ranging from 90mm to 240mm. Each post offers travel adjustment which means that if the 150mm of travel is a bit too tall you can shim it down to 140 or 130mm to fit. This means there are effectively many more than six travel options available, and riders will find they’re able to eke out every last bit of travel their bike and leg length can handle. My test sample is the 30.9mm diameter post with the full 240mm of travel (no shims).

Reviewer profile height: 190cm (6’3″) weight: 75kg (165lb) testing zone: Southeast, USA

The internal air cartridge features adjustable pressure from 250-300psi so riders can dial in the desired return speed. There’s a fairly standard two-bolt seat clamp at the top and at the other end, the actuator dispenses with the barrel nut clamp for easier installation. Overall the OneUp dropper post utilizes a design that should be fairly straightforward for most home mechanics to service themselves.

I had no fit issues with the 240mm travel post on my hardtail thanks to its long, straight seat tube. Still, even with my XL frame size and long legs I’m left with only about an inch between the collar and ring.

My dropper post weighs 649g plus another 111g for the OneUp dropper post remote (sold separately) and cable.

OneUp, 240 down

Compared to the 200mm-travel dropper posts I’ve tested, the OneUp 240mm dropper post feels a lot different, almost as if I’m somehow sitting below my top tube. In effect I guess I am with the tube rising a good couple of inches above the saddle by the time it reaches the head tube. On a hardtail, and with my saddle slammed forward there aren’t any issues with saddle-on-tire rub but I suppose that could be a real concern on a full suspension bike. Getting that low on the bike makes me feel super controlled through steep descents and especially when cornering tight trails. Fully in the down position my knees are about as bent as I would like; any more and things might start to get uncomfortable.

Initially I found the saddle a bit slow to return and assumed I needed to add a bit more pressure to the cartridge. However, with 40mm of additional distance to cover, I think the OneUp dropper post is as fast as most others, it just has farther to travel.

Earlier this year Matt looked at why 34.9mm seat post diameters are becoming more common, and the biggest argument for them is they allow dropper post designers to beef up the stiffness as posts get longer. As 30.9mm for my post, the smallest diameter on offer, I was worried there might be an issue with flex while pedaling in the fully up position, or worse, kinking or bending over time. After months of testing, I haven’t experienced any significant issues, and the OneUp dropper doesn’t feel noticeably flexier than the other 30.9mm posts I’ve tested. The post hasn’t developed much if any noticeable side-to-side wobble either.

During testing I found a bit of grease has worked its way out from beneath the stanchion wiper. I suspect the post may have been over-greased during assembly, though it hasn’t affected performance a bit. If I were really annoyed I might take the post apart and wipe away some of the excess grease.

I also tested the OneUp dropper post lever, which is sold separately for $59.95. It’s a nice lever, and there’s a pinch bolt to clamp the remote cable which makes installation a cinch. The paddle is ridged to provide grip, however I found it’s a little sharp on the thumb if you’re not wearing gloves. With gloves, it feels fine and doesn’t slip at all.

Bottom line

If you’re the type of rider who wants to maximize dropper post travel — and we’re pretty sure you are — the OneUp dropper post is hard to beat. Not only that, the straightforward design and operation make this a solid choice.

Check out this list of the best dropper posts we’ve tested and recommend, including the OneUp reviewed here.

Party laps

  • Maximum travel for a given bike size and leg length
  • Easy to install, use, and service
  • Cartridge pressure is adjustable

Pros and cons of the OneUp dropper post

Dirt naps

  • Possibly too much travel for FS bikes or shorter riders
  • Lever doesn’t feel good gloveless
  • Over-greased from the factory