My oneup dropper rises by itself. I’ve removed it completely from the bike to check the cable wasn’t too short or that the actuator was touching the frame.

I’ve removed the air and reinflated, but no, when I press it all the way down it slowly rises to around mid height (after say 10 seconds)

Whats (one)up?

Bump and grind

Does it do it with the cable detached from the lever?

My brand new one did it when I had the cable a tiny bit too tight.

Sorry perhaps should have been clearer. I removed the post completly from the bike, no cable attached.

Fire the guys at OneUp a message. They’re pretty decent to deal with.

Strip it down and service. Easy job. Instructions on YouTube. Only requires basic tools and fork grease (slick honey / sram butter / rsp slick kick). Good to do it occasionally anyway to keep it running nicely.

Cheers @rickon have done that.@guandax that could be a plan, but do you have any idea why it’s happening? Why would a service help?

Sorry, haven’t had this issue except when cable is too taught. They’re so easy to service so I’d start there. At the heart of the dropper is a sealed aircan which may be the cause of your issue. If it’s out of warranty you can pick them up from One Up. Easy to fit.

I had this issue with my 180. My supplier required videos as evidence. They then supplied a new cartridge under warranty, which didn’t arrive, they then supplied a second cartridge, which arrived and was easily fitted. The first cartridge then arrived which will be fitted when the second one eventually dies.

Then then the thread on the collar died (not x-threaded just so much grit) so they supplied a rebuild kit.

Poor thing will be Trigger’s Broom at this rate.

Cheers, just got this back from oneup…

Thanks for reaching out, sorry to hear you have been having this issue
Thanks for your patience.

We are working through an issue in a small batch of cartridges that have an internal fault causing a seal to be torn and allow the symptom of rising on its own and not stopping the rider weight from compressing it without actuation.It’s been relatively small/contained and we’re helping every customer get back on their bike asap.

I really appreciate your help and patience.  This type of thing is a first for us and we’re keen to solve the issue.  Know that a fix is in place at the factory level and our current in house inventory.

Always use plain flour with beef, not self raising.

Poor thing will be Trigger’s Broom at this rate.

A year later i’ve worn out the bushing again and the dropper was pushing through the threads on the top cap (i was having to tape it in place to the bottom tube) so i bought another rebuild kit. Fitted it and the same problem still.

I contacted the support guys in Canadia to see if it was possible to buy a separate bottom tube rather than chuck it away and they told me they are possible going to set up a refurbishment programme, but in the meantime are sending me a replacement lower tube and another rebuild kit for free!