Hub & cassette wear?

iPete
iPete Posts: 6,076
edited May 2011 in The workshop
Possibly being daft.

Whats acceptable wear for the cassette against the hub?

Had to fight to get my cassette of a damaged wheel & I'm now running 'weekend' wheels which = lots of switching.

After 40 miles on the new commuter wheel I noticed the cassette is already biting into the hub.

Am I over tightening, under tightening or is this completely normal?


IMG_1077-PS.jpg

Comments

  • nicklouse
    nicklouse Posts: 50,675
    what is the body made from?

    looks like aluminium.

    it happens when the cogs are all separate. Most makers with Alloy bodies suggest using cassettes that use a carrier. not often found on road cassettes.

    to sum up it is normal.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
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  • cjcp
    cjcp Posts: 13,345
    I've done this to two hubs. On the second, one of the sprockets actually worked its way through the groove on the hub.

    @Nick - I heard that a better quality cassette, which fits in the grooves more snugly so there's less play, can help avoid this. Any thoughts? I'm not convinced because I've done it on both occasions with Ultegra cassettes.
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  • iPete
    iPete Posts: 6,076
    Nick, blue cheese I'm guessing! (ok google says the Halo Mercury has an alloy hub).

    Put the commute wheels back on and the weekend wheels with steel hubs (apparently, RS80s) are still perfect, result!
  • rjsterry
    rjsterry Posts: 29,512
    I wouldn't have thought that the tightness of the lock nut is that relevant. You'd have to massively over-tighten it to prevent any movement of the cassette relative to the hub. I've seen similar wear on both my most recent freehubs, although not as marked as shown in the picture. I guess it's a symptom of the push for lighter (and presumably slightly softer) components, but freehubs are fairly easy to replace and IIRC not that expensive.
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  • mudcovered
    mudcovered Posts: 725
    nicklouse wrote:
    looks like aluminium.

    it happens when the cogs are all separate.

    to sum up it is normal.

    Confirmed. The aluminium freehub on my current back wheel is much worse than that (so much so that I need to use a chainwhip to get the cogs out of the grooves when I take the cassette off! Next time I'm replacing the cassette I'm expecting to replace the freehub body as well. I'm just crossing my fingers that Hope make a steel freehub body for their road hub so that I can use one of those instead of the current aluminium one. :D

    Mike
  • vorsprung
    vorsprung Posts: 1,953
    On the rear of my best bike I have an expensive and wonderful Hope Pro3 hub

    This has an aluminium carrier. I've only had the bike since last autumn and haven't used it heavily. I was surprised when I removed the cassette to find much heavier marks than you have. I had to file them out. But I am told that this is normal and the recommended solution is to use a cassette that is all one part

    Still think the Hope hub is nice though. Apparently there are steel freehub bodies available
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  • mudcovered
    mudcovered Posts: 725
    vorsprung wrote:
    On the rear of my best bike I have an expensive and wonderful Hope Pro3 hub

    Still think the Hope hub is nice though. Apparently there are steel freehub bodies available
    Same as mine then. Glad its not just my inept cassette fitting :wink: . Lovely hub but it is let down by the soft freehub body. The fact that a steel body is available is good news. Might get my LBS to order one of those in then as I'm getting sick of the faff when I take the cassette off to clean it.

    Mike
  • nicklouse
    nicklouse Posts: 50,675
    over £60 for the steel body.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • jejv
    jejv Posts: 566
    Hub body is unfit for purpose, surely. Not that that is news for something sold for a bicycle.

    http://sheldonbrown.com/k7.html#aluminum
  • jejv
    jejv Posts: 566
    nicklouse wrote:
    Most makers with Alloy bodies suggest using cassettes that use a carrier. not often found on road cassettes.
    The bottom 8 cogs have all notched the hub body. AFAIK, carriers usually only carry the three biggest cogs. By the time the carrier holds the 8 biggest cogs, a steel carrier would be lighter, no ?

    An aluminium cassette might work, if the aluminium cassette was soft enough...

    Edit: Ah. I see what you mean. Like XTR.

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