Are there such things as spacers that go above the seat collar & the under edge of the dropper post seal/collar to stop it slipping down, like steerer/stem spacers? Or just use carbon assembly paste?
I have a shim on mine - and its a bit rubbish.
Even with carbon paste it still slips down
The same thought had crossed my mind. It would make it impossible for a post to slip down. Twisting would then be your only worry.
What I actually did was get a Bikeyoke Revive that was slightly too long for my bike and then shim down the action. As it happens, the Bikeyoke doesn't slip and isn't overly sensitive to dear collar torque.
I have managed with carbon paste. Give the inside of the seatpost tube a good clean and the dropper post, then tight up just enough to prevent it slipping and not bind.
I think it is easy enough to tighten it up enough to stop twisting; stopping it sliding down without impairing the dropper action more difficult.
I've got a Lifeline mudguard that attaches to the lower part so takes up ~15mm, but the bit above it I'd only need a ~20mm to take up that space. I haven't managed to tighten up the mudguard collar to help stop it going down as its a screw fastener & is plastic.
I'm being lazy in not taking my dropper out to clean & paste it up, as it is massive faff. I've got carbon paste but haven't tried it yet. I was just wishing a mechanical stop/spacer might have been a more definitive solution, so I wouldn't need to re-do it.
There are some seat clamps that half fasten to the frame and half on the seat post.
I'll go & have a look, thanks.
Hmm, maybe a seatpost clamp with the top lip filed off would do, although it is another clamp rather than a spacer.
Mine will drop about 5mm over a few weeks until I notice.
The seat clamp bolt was dry-clicking as I tightened it up to torque, then no movement for the final bit up to the specified torque, so I probably wasn't tightening it up as tight as I thought I was. Now added a tiny bit of grease on the threads, will see if it's any better.
Hiw about a bit of PVC pipe cut to size? Could probably get it in 30 or 32mm then cut it length ways so it stretches to fit. Though I just use carbon assembly paste.
I was looking at nylon pipes before my initial post above, but hadn't see a suitable size. I hadn't searched for PVC, but that's a good idea thanks.
I don't know how you're setting the torque but on the wife's kore post that midbehaves a bit, I'll tighten the seat post collar, get the post to the sticky bit and they slowly undo the bolt until it moves again. Then check it's at least 5Nm.
I also lube the post with float fluid rather than grease as it's a bit more slippery so reduces the tendancy to stick. This only works as I typically invert the bikes before riding to lube the fork bushings and seals so the post gets the benefit too.
