The dropper post won't go up
Before thinking about the cartridge —the most expensive part—, check the cheap stuff, which is what fails almost every time: 1) the saddle collar over-tightened (excess torque deforms the tube and slows the bushing: loosen it to its torque, on the order of 5 N·m, and test); 2) the cable too tight or poorly routed (it leaves the lever without travel). Only if the collar and cable are fine do you move on to the cartridge or the pressure, depending on the type. If on top of that it sags when you sit down, that points to something else.
80% of the time it's the one-minute step almost no one does: loosening the collar. Start there.
The order, from simple to expensive
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Frequently asked questions
Why won't it go up?
Almost never the cartridge. It's usually the over-tightened collar or the cable too tight or poorly routed.
First step?
Loosen the collar to its torque (~5 N·m) and test. If it goes up, it was the clamping.
And if it still won't?
Check cable tension and routing. Only after that, cartridge or pressure depending on the type of post.
Related
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