MTB Seatpost keeps slipping - help!

[manbearpig]

Clean and dry the post and inside of the seat tube PROPERLY. You want it to be bone dry.

 

Then spray the seatpost, the area that will be clamped, with hair spray, nice firm hold hair spray. Also, slap on some clear nail polish. Insert the seatpost and clamp it.

 

Give it an hour or so to set. See how that works for you.

 

If that doesn't work you can dress up in drag and scare the neighbours...

[MrJacques]

Hack: Put a broomstick down the seat tube that's the length of the seat tube + exposed seat tube (so it's inside the seat tube + post). Might still rotate, but won't sag again

 

Even better hack: Drill a hole right through the seat tube + seat post and bolt it in place

 

* won't work with dropper posts.

Edited December 24, 2020 by MrJacques