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OneUp V3 Dropper Post – 180mm Travel x 34.9mm | Lightweight, Smooth & Reliable MTB Seatpost
OneUp V3 Dropper Post – 180mm Travel x 34.9mm | Lightweight, Smooth & Reliable MTB Seatpost
Oneup

OneUp V3 180 x 34.9mm Mountain Bike Dropper Post - Black

£289.99
Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined

OneUp V3 180 x 34.9mm Mountain Bike Dropper Post - Black

Brand:Oneup

Code:1C0981

The OneUp V3 180 x 34.9mm Dropper Post is the lightest, longest, smoothest, and most reliable mountain bike dropper seatpost available. Engineered for performance, this infinitely adjustable dropper post is designed to give you maximum drop in the shortest possible length, making it the ultimate upgrade for aggressive trail riders, enduro racers, and all-mountain shredders.

With a shorter total length and stack height than any other dropper post, plus 20mm of travel adjustment, the V3 ensures the perfect fit for riders of all sizes. Thanks to self-lubricating IGUS® bushings and low-friction SKF® seals, the V3 delivers an incredibly smooth actuation with 75% less breakaway force compared to the V2. Longer service intervals and a recyclable sealed cartridge make it the most durable and eco-conscious option on the market.

Whether climbing, descending, or flowing through technical singletrack, the OneUp V3 Dropper Post is built to perform flawlessly ride after ride.

  • Lightest infinitely adjustable dropper post on the market – lighter than XC-specific 2-position posts
  • 180mm travel with 20mm adjustable range for a custom fit on any MTB frame
  • Shortest total length & stack height for maximum drop, even on smaller frames
  • Ultra-smooth actuation with IGUS® bushings & SKF® seals
  • 75% reduction in breakaway force compared to V2 for easier saddle drop
  • Extended service intervals – 120 hours (clean & grease), 350 hours (full rebuild)
  • Fully user-serviceable at home with a OneUp EDC multitool or standard hex keys
  • Recyclable sealed cartridge – reliable, eco-friendly design
  • Optional Titanium Bolt Upgrade Kit saves an extra 10g
  • Backed by a 2-year warranty

  • Lighter: The lightest infinitely adjustable MTB dropper post, suitable for all riding styles.
  • Smoother: 75% less force required to drop your saddle, with ultra-low friction seals for consistent performance.
  • More Reliable: Long service intervals and easy home maintenance make it one of the most dependable droppers available.
  • Max Drop, Minimal Stack: The shortest overall length and stack height let you run the longest travel post possible on your bike.

What's in the Box

  • 1x Dropper Post - V3
  • 1x Cable barrel end
  • 1x Packet of light suspension grease
  • 2x Sets of 10mm travel reducing shims
  • V3 Remote, Bar Clamps/Adapters and Coloured Remote Lever Cushions Sold Separately

The OneUp V3 180 x 34.9mm Dropper Seatpost is perfect for mountain bikers who demand lightweight performance, smooth operation, and rock-solid reliability. Whether you ride trail, enduro, or downhill, this dropper post maximises confidence and control on every ride.

Technical Information
  • 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)
  • Weight:
    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
Sizing Information
Professional Opinion
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