• This topic has 22 replies, 18 voices, and was last updated 7 years ago by julzm.
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  • Dropper post that isn't damaged by lifting bike by saddle nose.
  • Andy-R
    Full Member

    What is there around that you can do this with, other than the Gravity Dropper? Or do all hydraulic posts run the risk of drawing air in if you do this?
    I’m looking at 125/150mm drop, 31.6mm dia, either stealth routed or fixed actuator (ie on body of post, like the KS Lev).
    Yes, I know what the answer will be – “don’t lift bikes by the saddle” but, after doing this for thirty years it’s like remembering not to try switching the lights on automatically, even though you know that there’s a power cut.

    So, that’s the Reverb eliminated (I have one already), KS, probably Thomson……

    That Eightpins post would be ok but unfortunately is frame specific.

    nickjb
    Free Member

    Command Post. The forgotten hero of dropper posts

    STATO
    Free Member

    You can lift a reverb by the saddle, just not when its down. So dont leave your saddle down.

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    SirHC
    Full Member

    Watched one of the drivers at BPW yesterday pulling on saddles to check bikes were secure, some of those with saddles down may have had a little bit of air ingestion into the hydraulic side.

    Gravity dropper?

    stilltortoise
    Free Member

    Today I learnt that I shouldn’t be doing something I’ve always been doing 😳

    accu
    Free Member

    after problems with 2 early reverbs, KS and a Command Post
    (another problem ,got two times a new one so! )..
    i went back to the old, trusty and adorable ugly Gravity Dropper.. 🙂

    for me problem solved..
    just got another one from the US for my fatbike..

    big_scot_nanny
    Full Member

    The Thomson post does not raise when you pull on the saddle.

    Andy-R
    Full Member

    I hadn’t seen that Revive seatpost before, so thanks for that – I’ll have a look for more info.
    If I could get a Gravity Dropper in 31.6mm diameter with at least 125mm drop then I’d probably just use one of those as I like their simplicity and have them on a couple of other bikes (both 27.2 x 100).
    And I do try to remember the non-lifting thing, but it still sometimes catches me out………doesn’t everyone have this problem or do some people never feel the need to lift bikes over stuff?

    Edit….

    Oh, so Thomson would be ok then? I didn’t realise that, so thank you.
    And I see I could get a GD in 31.6 x 125mm…..

    Nobeerinthefridge
    Free Member

    Yep, lift bikes over fences/walls regularly, but never by the saddle as you have lift the bike much higher. Lift by seat tube and fork leg.

    STATO
    Free Member

    Yep, lift bikes over fences/walls regularly, but never by the saddle as you have lift the bike much higher. Lift by seat tube and fork leg.

    Its not ‘lifting’ in that sense, you can ‘lift’ a bike an inch or two off the ground to move the back wheel to another spot, same issue.

    milky1980
    Free Member

    I’ve got the same conundrum coming up as both my Reverbs are playing up. One is at the limit of stopping rotational play – largest brass keys in and it still wobbles – and the other is occasionally stiff to move and is now doing the 2-3mm sag thing. It’ the new ‘improved’ one too and only 4 months old! I’m going for the Fox Transfer next time.

    Northwind
    Full Member

    Always done it with my 2 KSs, never caused a problem… With the Reverb it seems like it can sometimes pull air past the IFP but then, so can just using it normally so that feels more like an excuse than anything else. (I avoided doing it with my new reverb, it went squishy anyway, because that’s what Reverbs do)

    benp1
    Full Member

    I don’t understand the problem – I mean this in a genuine constructive way here

    Is the problem that:
    – you shouldn’t ever lift by the nose of the saddle with a dropper (up or down)
    – you shouldn’t temporarily store a bike by the nose of the saddle (up or down) a la BPW
    – you shouldn’t store it by the nose of the saddle full stop

    I do the former sometimes when I need to move the bike, but not so much. Trying to work out if it’s bad

    And is the nose significantly worse than the tail?

    weeksy
    Full Member

    – you shouldn’t temporarily store a bike by the nose of the saddle (up or down) a la BPW
    – you shouldn’t store it by the nose of the saddle full stop

    My X Fusion HiLO is cable operated and lives all it’s life hanging from the rafters by it’s nose. It’s not had any effect at all.

    STATO
    Free Member

    Ben, its lifting the saddle when lowered that’s the issue with reverb. The hydraulic lock is to stop the post going down, not up. Pulling on it can cause air to be sucked past the seal into the oil.

    D0NK
    Full Member

    With the Reverb it seems like it can sometimes pull air past the IFP but then, so can just using it normally so that feels more like an excuse than anything else

    does a rebleed get rid of this air? Or have you got to strip it down (specialist tools needed?)

    Andy-R
    Full Member

    I don’t see that it’s a problem when the post is fully extended, whatever make it is and, as STATO said, the problem isn’t really when you need to chuck a bike over a fence or wall but those odd moments when you just find yourself lifting the back of the bike even, like with me yesterday, to untangle it from some branches and brambles.

    Rubber_Buccaneer
    Full Member

    9point8 maybe?

    On Reverbs I agree with Northwind.

    does a rebleed get rid of this air?

    It’s not air in the remote system so bleeding that won’t help.

    tomvanhalen
    Free Member

    Does anyone know if the Giant post is immune to the unintentional suspension seatpost conversion?

    Northwind
    Full Member

    D0NK – Member

    does a rebleed get rid of this air? Or have you got to strip it down (specialist tools needed?)

    Needs a full strip. Tools required depends on which model- with my older one you don’t really need anything, the IFP setting tool could be bodged around but it’s only a fiver so I just bought it. And the oil tool is basically just a thin straw and a syring so I just made one. A 23mm crows foot is useful too. TBH Reverbs being what they are it’s probably a useful thing to be able to do.

    wobbliscott
    Free Member

    Strange, my reverb doesn’t do this. If I lift the bike by the saddle with the seat down it doesn’t rise, it stays put at the height it’s locked at. My previous reverb didn’t at first then started to do it, but didn’t seem to be adversely affected by it – not immediately anyway. It lasted a good 18 months before it completely went wrong and I sent it off for a full refurb. Not refitted it post referb as yet.

    julzm
    Free Member

    The 9point8 and the raceface turbine droppers have both mechanical and hyrdraulic locking to give more security and less pressure on the hydraulics when it’s locked. I’ve just sold one off my old bike and it was a great piece of kit. Only downside would be how fast it extends…very fast. Could be painful to some!

Viewing 23 posts - 1 through 23 (of 23 total)

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