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OneUp Components Dropper Post V1 Rebuild Kit

OneUp Components Dropper Post V1 Rebuild Kit

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Special Order Notice

Items in your order marked Ships in 10-14 Days are Special Order items, which means we have to order the item(s) for you from our supplier. Your whole order will be held until all items are in stock and will ship in 10-14 days.

If you are ordering other items which are in stock, you may wish to order those separately so they ship without delay.

Ships from Supplier Notice

This item will ship directly from our supplier in 1-3 business days.


This kit includes all the parts required to rebuild your V1 Dropper Post.
  • Replacement Seal
  • Upper and lower bushings
  • Anti-rotation pins
Compatible with V1 Dropper Post ONLY.

If your V1 OneUp dropper is slow to extend, chances are that this may be caused by low air pressure. Please make sure to check this first and do so with the post fully extended. Proper air pressure is 280-300psi at full extension. The valve is located under the top clamp.

If you are still having slow top out then there is a possibility that the upper white bushing needs replacement. This will be evident by the original bushing being difficult to reinstall after being removed. This kit will give you everything you need to get your post feeling schmick again.

Upper Bushing Replacement:
To replace the upper bushing follow the steps for greasing (see vid below) and when exposed simply spread the gap by hand and slide it off the upper tube. Once off, put the post in a mid dropped position and install the new upper bushing. The new upper bushing should be easier to reinstall.

Brass Key/Lower Bushing Replacement:
The brass keys were put in this kit as a precaution in case OneUp determined that they are a high wear item. To date, they have found no measurable wear on these pieces. As such, OneUp has not had cause to recommend replacing them yet.

Warning - replacing the brass keys without proper tools may cause more damage than good and will have no effect of top out. You can probably leave them alone unless they're showing signs of corrosion and you want to get some freshies in there.

If you do have the proper equipment and expertise to replace these parts the process is as follows:
  1. Disassemble the post using steps 1-5 of dropper-service-instructions (see link to this below)
  2. Wipe the area to remove the grease.
  3. Carefully clamp the old key with a pair of vice grip pliers (this will damage the key so note that the old key can not be reinstalled) and pull out.
  4. Remove the lower bushing
  5. Slide the mid-cap off and replace the seal/spring
  6. Grease the mid-cap/new seal and reinstall
  7. Install the new lower bushing
  8. Next, install the new lower keys. Note that the new keys have a flat side and a slightly rounded side. The rounded side will be pressed into the upper tube slot.
  9. Do not grease the new keys.
  10. Press the three new keys in as far as possible by hand.
  11. Locate a bench-mounted vice and both aluminium flat and plastic grooved soft jaw plates for the vice.
  12. For the two keys that oppose each other use two flat aluminium soft jaws to gently press the keys in (it does not take much force)
  13. For the third key use a flat aluminium soft jaw on the key side and a grooved plastic soft jaw on the upper tube side to gently press the key in.
  14. Re-grease the keys and reassemble the post using steps 6-12 of dropper-service-instructions

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