Ribble Gran Fondo clamp torque setting

djb1971
djb1971 Posts: 565
edited September 2013 in Workshop
What torque should the seatpost clamp be?
It's the Deda twin bolt type.

Thanks

Comments

  • keef66
    keef66 Posts: 13,123
    have you thought about asking somebody at Ribble?
  • arran77
    arran77 Posts: 9,260
    Not sure but I use one of these for seat clamp, stem, bars etc, excellent tool.

    http://www.pedalon.co.uk/acatalog/bontrager-5nm-torque-wrench.html
    "Arran, you are like the Tony Benn of smut. You have never diluted your depravity and always stand by your beliefs. You have my respect sir and your wife my pity" :lol:

    seanoconn
  • djb1971
    djb1971 Posts: 565
    I've got a torque wrench thanks :wink:

    I asked ribble and they've told me 6-7nm, the clamp is super tight at 2.5nm, there's no way it's 6+!
  • rolf_f
    rolf_f Posts: 16,015
    djb1971 wrote:
    I've got a torque wrench thanks :wink:

    I asked ribble and they've told me 6-7nm, the clamp is super tight at 2.5nm, there's no way it's 6+!

    So why are you asking what the setting is - you've been told. The problem is you don't agree. Either the manufacturer doesn't know it's own torque settings or your torque wrench is inaccurate or you have poor judgement as to what is tight enough.

    I'd tend to discount option 1 :wink:

    FWIW, on my GF with similar clamp, I think I tend to go to 5nm but it probably doesn't matter too much (and, besides, I'm very light) - particularly as it has a height collar on as well which minimises any chance of slippage if under torqued.
    Faster than a tent.......
  • djb1971
    djb1971 Posts: 565
    Discount option 1 :?:

    The clamp is almost closed at 3nm, I've got a rather expensive carbon post I don't want crushed and your clamp is different. My clamp is the deda twin bolt, it doesn't have an extra bit to stop slippage.

    I've got 3 torque wrenches, all calibrated. I use them at work :wink:
  • rolf_f
    rolf_f Posts: 16,015
    djb1971 wrote:
    Discount option 1 :?:

    The clamp is almost closed at 3nm, I've got a rather expensive carbon post I don't want crushed and your clamp is different. My clamp is the deda twin bolt, it doesn't have an extra bit to stop slippage.

    I've got 3 torque wrenches, all calibrated. I use them at work :wink:

    No, it's the same clamp as yours. You misinterpreted my post - the collar is nothing to do with the clamp (if it was it wouldn't work! :wink: ).

    Point stands. If you know your post is adequately torqued, why do you need to ask for a torque setting? FWIW, I hadn't checked mine after I removed it and replaced it from travelling back from holiday. I did just now thanks to your thread. It was massively under 3nm (no doubt mostly supported by the collar) but had been used for several hundred miles since - I torqued up to 3nm and then on to 5nm - which was only about another full turn of the bolts. I'm sure you'll be fine with three and I'm sure you'd be just as fine with 5nm. If you can crush a seat post with 5nm then personally I wouldn't trust it on the bike.
    Faster than a tent.......
  • djb1971
    djb1971 Posts: 565
    Left the bolts at 3nm, that's plenty tight with paste.
  • rolf_f
    rolf_f Posts: 16,015
    djb1971 wrote:
    Left the bolts at 3nm, that's plenty tight with paste.

    Here's an irony (I blame you - it can't be coincidence!) - I was tightening the bolts up to 5nm as usual today and one of them stripped the thread of the clamp! The thread is now attached to the bolt rather than the clamp!

    Ribble confirmed 6-7nm so how 5 would do this I don't know. Anyway, Ribble are being their usual nice selves and sending me a new one.
    Faster than a tent.......
  • djb1971
    djb1971 Posts: 565
    Don't do them to 6+ :!:
    Mine are holding fine at 3nm with paste. I think a single bolt may need 6nm but the twin bolts don't need anywhere near that.

    Now you know why I asked :wink:

    btw, I'm blaming Wiggle :lol:

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