Free wheel body damage

markwb79
markwb79 Posts: 937
edited July 2011 in Workshop
Hi,

I was changing cassettes last night and noticed that the body of the freewheel was very pitted. I have seen marks before, but nothing like this.This is the first time it has come the cassette has come off the bike since I bought it.

The wheels are Easton EA70's and its a Ultegra cassette, they have only done about 2000km. I am assuming this isnt normal? What causes it and does it need changing?

Thanks
Mark
[/img]
Scott Addict 2011
Giant TCR 2012

Comments

  • Monty Dog
    Monty Dog Posts: 20,614
    If you're talking about indentations in the splines, its usually a combination of a soft alloy freehub body and cassette lockring not tight enough. The sprockets can therefore move a little and cause fret damage to the freehub. Clean off any burrs with a file, refit cassette and tighten lockring firmly.
    Make mine an Italian, with Campagnolo on the side..
  • keef66
    keef66 Posts: 13,123
    I think with shallow splines on an alloy freehub body with individual steel sprockets this is inevitable even with a properly torqued lockring. Having the lockring not tight enough will only make things worse.
  • markwb79
    markwb79 Posts: 937
    What sort of torque should the cassette be at then?
    Scott Addict 2011
    Giant TCR 2012
  • P_Tucker
    P_Tucker Posts: 1,878
    Markwb79 wrote:
    What sort of torque should the cassette be at then?

    Using old fashioned measurements, as tight as you can get it without having to stand up to get more weight behind it. Don't know how that converts to Newton Metres.
  • HadronCyclist
    HadronCyclist Posts: 69
    40-70Nm...but I would say slight pitting is not an issue. See it on all kinds of bikes on a daily basis.
  • markwb79
    markwb79 Posts: 937
    I agree on the slight pitting, all of wheels have it a little. But on these Easton's, its really bad!
    Scott Addict 2011
    Giant TCR 2012
  • rubbernekker
    rubbernekker Posts: 112
    At risk of sounding like Monty Dog- Go Campag! this will never happen with a Campag pattern cassette.

    If you don't want to do that and I can see that not everyone is ready to see the light just yet, then a good torque wrench is the cheapest way of minimising the damage- the only way to stop it is a sram red powercone cassette. Not cheap.
  • HadronCyclist
    HadronCyclist Posts: 69
    sorry mate, you are wrong, my sram red cassette has pitted my racing zero hubs. it happens, bike bits get worn.

Categories