For I am become Death, the destroyer of bicycles

Discussion in 'Cycling Archive' started by Ian Jackson, Oct 1, 2015.

  1. Ian Jackson

    Ian Jackson Guest

    Full service last December, including new cassette, chain, a tyre and
    various odds and ends. North of L100.

    I noticed shifting was poor and looking at the chain it seemed not to
    be bending properly everywhere. I thought "I will bring this in to be
    fixed" but before I managed that, on Monday night the chain snapped.

    Now, I'm told I need: new cassette, chain, BB (current one was May
    2013), rear mech, another tyre, rear brake cable, etc., nearly L200.
     
    Ian Jackson, Oct 1, 2015
    #1
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  2. Ian Jackson

    Peter Clinch Guest

    Rohloff and Gates Belt, hydraulic brakes... All you'd then was a winning
    lottery ticket to pay for it.

    Pete.
     
    Peter Clinch, Oct 1, 2015
    #2
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  3. Ian Jackson

    Clive George Guest

    Oops :)

    It might be sensible to change your chain a little earlier. Though maybe
    I should take my own advice, having just done chain/cassette/middle ring.

    Are you using stainless brake cables? I don't have to change cables
    nowadays.
     
    Clive George, Oct 1, 2015
    #3
  4. clearly a lot depends on useage, my commute/town bike is a old MTB, with
    a lot of gravel tow paths/royal parks I get 1K (miles) out of a chain so
    a few times a year, and a cassette every year and a bit.

    oddly even though the tyres are higher end XC with soft rubber they seem
    to wear better than the various 25mm slicks on the road bike which at a
    simular distance would be squared off and be fairly cut up.

    oddly enough the slicks picked up two or three punctures a year, where
    as since i've been using the MTB in this role bar one over loaded kerb
    hopping attempt pinch flat, been puncture free for two years.

    I assume it's to do with wide soft vs thin hard tyre. since both bikes
    spend the most of the time on the same routes/areas and risks ie glass
    and gravel.

    Roger Merriman
     
    Roger Merriman, Oct 1, 2015
    #4
  5. Ian Jackson

    Rob Morley Guest

    On 01 Oct 2015 11:00:52 +0100 (BST)
    If you bothered to maintain it, or show even a hint of mechanical
    sympathy, the bits might last a bit longer.
     
    Rob Morley, Oct 2, 2015
    #5
  6. Ian Jackson

    Tosspot Guest

    That is Ricky Deemus. A cassette BB should last 10,000 miles, a chain
    should be good for 2,000, a cassette, may be twice as long as a chain,
    and a chain ring the same, closer to 4.

    To do that you must be doing 4K a year in a gravel pit!
     
    Tosspot, Oct 2, 2015
    #6
  7. Ian Jackson

    Ian Jackson Guest

    They tell me my chainring should be kept an eye on and will probably
    need replacing in ~3 months.
    No idea. Nowadays I mostly use whatever Station Cycles in Histon put
    on it, because I'm too lazy to do it myself.

    I'm told the BB went because the frame had water in it. Apparently
    not for very long, because very little internal corrosion to the
    frame. They have no idea how the water got there. They tell me I
    should wait a few weeks/months and then take out the seatpost and turn
    the bike upside down, to see if water has accumulated again.

    I asked `and what if it has' and they didn't seem to have a good answer...
     
    Ian Jackson, Oct 2, 2015
    #7
  8. Ian Jackson

    Ian Jackson Guest

    That's a bit of a mean thing to say, isn't it ? It's true that I'm
    hard on it but I'm not cleaning the blasted chain myself and if I pay
    Station Cycles to do it it'll probably cost more time and money
    overall.
     
    Ian Jackson, Oct 2, 2015
    #8
  9. Ian Jackson

    Ian Jackson Guest

    I'm doing probably 4000km a year, but in Cambridge which isn't quite a
    gravel pit.
     
    Ian Jackson, Oct 2, 2015
    #9
  10. I've had frames with a quarter inch hole in the underside of the bottom
    bracket, and always wondered if that was a net gain or loss in the fight
    against corrosion... probably a gain for you.

    Less worrying in these years of fully sealed bottom brackets.

    Cheers - Jaimie
     
    Jaimie Vandenbergh, Oct 2, 2015
    #10
  11. Ian Jackson

    Tosspot Guest


    I was talking miles! I do around 2,000 miles/year through snow and ice,
    in a very sandy environment. I used to change the chain annuallybecause
    it's a good idea, then I'd get 2-3 years out of a cassette, another year
    from a chain ring, and another year for a BB[1]. You are lubricating
    the chain aren't you. Or is the bike stored outside all year?


    [1] Outside bearing tripe only lasted a year so I converted back to
    sealed BBs.
     
    Tosspot, Oct 3, 2015
    #11
  12. Ian Jackson

    Ian Jackson Guest

    I am indeed lubricating the chain. The bike normally lives inside,
    although recently I've had to park it on racks outside at Cambridge
    Station a a few times.
     
    Ian Jackson, Oct 3, 2015
    #12
  13. Ian Jackson

    Clive George Guest

    Probably not then. You could ask them what sort they fit and if they can
    fit one.
     
    Clive George, Oct 4, 2015
    #13
  14. Ian Jackson

    Tosspot Guest

    I dunno, you must be using more cream componentry than I am, and while I
    don't believe in buying swiss cheese for commuters, I do try and stay
    clear of the bottom end.
     
    Tosspot, Oct 4, 2015
    #14
  15. The higher end with Ti and even Alu partial cassettes etc will have a
    much faster wear rate, even cheap 7/8 speed stuff is Nickel-plated steel
    and for £10/15 will be far harder, and last longer.

    Roger Merriman
     
    Roger Merriman, Oct 5, 2015
    #15
  16. Ian Jackson

    Clive George Guest

    Probably irrelevant to most people, but XT and posher cassettes aren't
    as strong as the lower ones without the flashy sprocket carriers.
    Learned that the hard way on the MTB tandem - pity, because they're a
    lovely piece of engineering.
     
    Clive George, Oct 6, 2015
    #16
  17. Ian Jackson

    Tosspot Guest

    Is that because it failed or wore out. Because one of the chaps at work
    has 10 years out of a (I think) XTR cassette with annual chain
    replacement. He probably about 1,000km/year on it, but he is a bit of a
    wuss when it comes to rain.
     
    Tosspot, Oct 6, 2015
    #17
  18. Ian Jackson

    Clive George Guest

    The big sprocket snapped on about the first or second ride. There's just
    not enough metal in the right place for a lumpy tandem team.
     
    Clive George, Oct 6, 2015
    #18
  19. You can skip the Gates Belt and definitely skip the hydraulic brakes!
    Chains have a perfectly reasonable life on fixed- and hub-gear systems
    with decent sized steel cogs (at least 16, preferably more). And well-
    greased (sic) brake cables last for ages, too; gear ones have a harder
    life and last less well.


    Perhaps. I don't know how much better modern aluminium is, but
    it's not a good material for such uses. And the problem with a
    derailleur is that any wear of any component accelerates the wear
    on everything else. And they salt the roads in winter around here.

    Regards,
    Nick Maclaren.
     
    Nick Maclaren, Oct 8, 2015
    #19
  20. Ian Jackson

    Tosspot Guest

    Anyone know how long Gates belts actually last? They've been out a few
    years now.
     
    Tosspot, Oct 8, 2015
    #20
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