V3 Dropper Post

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V3 Dropper Post


The lightest, longest, smoothest and most reliable dropper post that will fit your bike.

The V3 is the lightest infinitely-adjustable dropper post on the market, it has the shortest total length and stack height of any dropper post, 20mm of adjustable travel, an extended 350-hour service interval, and new ultra-low friction IGUS® bushings and SKF® seals. Plus, save an additional 10g with our Titanium Bolt Upgrade Kit.

Product Specs

Drop: 90mm / 120mm / 150mm, 180mm / 210mm / 240mm

Adjustable Travel: Dropper post travel can be reduced by 10mm or 20mm.

Compressed Stack Height: 30mm (25mm for 34.9)

Diameters: 30.9 / 31.6 / 34.9 / 27.2mm (90mm & 120mm)


  • 27.2 - 90mm 304g / 120mm 340g
  • 30.9 - 90mm 325g / 120mm 370g / 150mm 415g / 180mm 460g / 210mm 515g / 240mm 585g
  • 31.6 - 90mm 337g / 120mm 390g / 150mm 433g / 180mm 480g / 210mm 538g / 240mm 610g
  • 34.9 - 90mm 408g / 120mm 472g / 150mm 535g / 180mm 600g / 210mm 675g / 240mm 765g

View full dimensions chart
View exploded view & parts list

What's in the Box
Things you Should Know
  • 2-year warranty.

  • Save an additional 10g with our Titanium Bolt Upgrade Kit.

  • Longer service intervals: 120 hours for a clean and grease & 350 hours for full rebuild.

  • 75% reduction in breakaway force and smoother actuation, compared to V2.

  • Post can be fully disassembled and serviced at home using only a OneUp EDC multitool in less than 10 minutes (14mm wrench, 5mm Hex, 2mm Hex).

  • OneUp Sealed Cartridge: No need to adjust or top up air

  • Total length is up to 10mm shorter and compressed stack height is 3mm shorter than V2.

  • Increased bushing overlap, IGUS® bushings, low friction SKF® Seal.

  • New OneUp cartridge is 100% recyclable.
Seatpost Diameter:27.2mm
Dropper Post Travel:90mm
In stock! Usually ships within 24 hours.


This is the lightest infinitely adjustable dropper post on the market. Even lighter than 2-position XC specific lightweight posts and suitable for all rider heights, weights and riding styles. Save an additional 10g with the Ti Bolt Upgrade Kit.


This is the best feeling dropper you’ll ever ride. It takes 75% less actuation force to drop your saddle, it has ultra low-friction, self-lubricating IGUS® bushings and a low friction SKF® wiper seal keep the V3 running smoother for longer, with less maintenance.

More Reliable.

A simple and reliable low-maintenance design is insanely easy to work on at home using only the OneUp EDC multi-tool or three standard tools (14mm wrench, 2mm & 5mm hex). Plus, it has a super long, 350-hour interval between recommended services.

Get the Most Drop.

Whether you ride an XS or XXL, the V3 is the longest post that will fit your bike. It has the shortest stack height and shortest total length of any other post and offers 20mm of adjustable travel. Use our Dropper Post Length Selector to find your perfect post. Easy.


What size of dropper post will fit my bike?

Every rider is different, with different frames and rider inseams, etc. Your best bet is to use our Dropper Post Length Selector. You will need: Your current ride height, the distance from the top of the seat post collar to the middle of your saddle rails. Maximum Frame Insertion measurement. You can find this by inserting a rigid post or tape measure into your frame until it hits an obstruction. Simply plug those into the calculator and we'll give you our recommendation of dropper length based on those measurements.

How regularly should I service my dropper post?

We recommend you do an upper bushing clean-and-grease every 25hrs of riding, a full clean and grease service every 75-100hrs of riding, and a full rebuild every 250-350hrs of riding.

Will this post be compatible with my existing dropper remote?

Most likely, yes.

If your dropper remote is cable clamping (has a bolt to clamp the cable) then yes, it is compatible with our dropper. If your remote does not have a cable clamp bolt, you can purchase the Dropper cable/nut kit. It comes with a cable bushing that can clamp a cable. With this you can set up any none cable clamping remote.

Are the seat clamps compatible with oval carbon rails?

Yes, our seat clamps are fully compatible with 7x9mm & 7x10mm carbon seat rails.

The actuator, inside the post, doesn't line up front to back?

The orientation of the actuator is dependant on the threads in the lower tube. This means the actuator orientation, once tightened up, is arbitrary and different on every post. The actuator orientation cannot be changed without rotating the lower tube on the guide pins.

Why is my post slow to extend when I actuate it?

There can be a few different reasons for slow dropper extension. The first checks should always be:

  1. Check seat collar is torqued no higher than 5Nm.
  2. Check the cable tension is correct and the cable is not kinked, binding or sluggish.
  3. Check the upper bushing is properly greased and there is no evidence of excessive wear.

If your posts continues to extend slowly then please email us at support@oneupcomponents.com and we will help resolve your situation.

Do you sell replacement upper or lower tubes?

We do not have upper and lower tubes available as single items.

What grease should I use to service my post?

OneUp droppers should be serviced using a light suspension grease. All droppers come with a small packet of Slickoleum, but any light suspension grease will do the trick. We do not recommend any lubes, including fork boost on our droppers.

What's the minimum weight required to compress the V3 dropper?

A minimum rider weight of 50lbs is required to fully compress the post.
Make sure to apply force to the nose of your saddle, if you're close to that minimum!


Enduro Mag

OneUp have managed to raise the bar once again with the Dropper Post V3. OneUp have made many significant improvements.

Vital MTB

It's really cool when affordable new products come out that increase durability and maximize efficiency.

WideOpen Mountain Biking

OneUp have been at the forefront of dropper post performance and have upped their game again with third iteration, the V3.


V3 Dropper Cartridge Replacement Instructions
V3 Dropper Cartridge Replacement Instructions

V3 Dropper Exploded View & Parts List
V3 Dropper Exploded View & Parts List

V3 Dropper Travel Adjustment Instructions
V3 Dropper Travel Adjustment Instructions

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