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changing chainsets

  • This topic has 12 replies, 10 voices, and was last updated 13 years ago by Paul J.
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  • August 1, 2013 at 12:22 pm #19508
    kjonesy83

    I currently have a 50/34 chainset however I would like to change this for a 53/39… How straightforward is this to do myself?! Is there anything else i would need to change? Thanks

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  • August 3, 2013 at 11:37 am #750473
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    Paul J

    Is it really worth replacing
    Is it really worth replacing the whole crankset to get 53T? I’d suggest only if your bike rides are downhill in both directions. 😉

    Note that if your rear cassette has a 12T as smallest cog, then changing it to a 11T gets you a larger gear with a 52T front, than a 53T would with the 12T. I.e. 53/12 is *less* than 52/11.

    August 2, 2013 at 12:09 pm #750471
    0
    700c

    robdaykin wrote:Fringe

    robdaykin wrote:
    [quote=Fringe]
    ‘ere you go, 110BCD 53T.
    http://www.spacycles.co.uk/products.php?plid=m2b0s113p1727%5B/quote%5D

    one note of caution, I bought a triple with those rings and TA don’t seem to have spent much time changing gear. They commonly drop the chain instead of changing up.

    Thanks Fringe, great range of custom sizes on that site and I presume compatibility across shimano and campag.

    Would be useful to get anybody else’s experience? Sorry for hijacking the thread..

    August 2, 2013 at 6:22 am #750469
    0
    Anonymous

    Fringe wrote:
    ‘ere you go,
    [quote=Fringe]
    ‘ere you go, 110BCD 53T.
    http://www.spacycles.co.uk/products.php?plid=m2b0s113p1727%5B/quote%5D

    one note of caution, I bought a triple with those rings and TA don’t seem to have spent much time changing gear. They commonly drop the chain instead of changing up.

    August 2, 2013 at 5:22 am #750467
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    spongebob

    I got a Sram force double
    I got a Sram force double crankset for £78 on eBay , is your compact worn out?

    August 1, 2013 at 9:28 pm #750465
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    Raleigh

    Or if you want to Pardy go
    Or if you want to Pardy go and get some Q rings…

    August 1, 2013 at 8:57 pm #750463
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    racingcondor

    Or just go for a 52 big ring
    Or just go for a 52 big ring for virtually no difference.

    August 1, 2013 at 3:05 pm #750461
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    Fringe

    700c wrote:Paul wrote:
    Note,

    700c wrote:
    Paul wrote:

    Note, you might not find 110mm 53/39 rings – those tend to available only for 130mm BCD. But you can get 52/38 and maybe 36.

    And this is the problem!

    I’ve been looking for 53t in 110bcd for a while, with no luck. I’ve only seen custom sets available at great expense..

    So your only option may be to replace crankset in it’s entirety

    I’d be v interested to know if you find a solution though

    ‘ere you go, 110BCD 53T.
    http://www.spacycles.co.uk/products.php?plid=m2b0s113p1727

    August 1, 2013 at 1:52 pm #750459
    0
    Guido

    You will also need to move
    You will also need to move your front derailleur up to accommodate the extra height of the chain rings.

    August 1, 2013 at 1:48 pm #750457
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    pirnie

    Don’t forget to think about
    Don’t forget to think about chain length. Going from a compact to a double, you might not have enough slack in the chain so a new one might be required.

    August 1, 2013 at 1:33 pm #750455
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    700c

    Paul wrote:
    Note, you might

    Paul wrote:

    Note, you might not find 110mm 53/39 rings – those tend to available only for 130mm BCD. But you can get 52/38 and maybe 36.

    And this is the problem!

    I’ve been looking for 53t in 110bcd for a while, with no luck. I’ve only seen custom sets available at great expense..

    So your only option may be to replace crankset in it’s entirety

    I’d be v interested to know if you find a solution though

    August 1, 2013 at 1:25 pm #750453
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    kjonesy83

    Paul – Thanks very much for
    Paul – Thanks very much for that!

    August 1, 2013 at 1:12 pm #750451
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    Paul J

    It’s fairly straight-forward.
    It’s fairly straight-forward. 5 minute job once you have the right tools.

    a) Purchase new chain-rings – make sure they are the right “Bolt Circle Diameter” (BCD) for your crankset’s spider. If you have a 50/34, your crankset almost certainly is the “compact” 110mm BCD (as opposed to the 130mm “double” standard).

    b) Purchase spare chain-bolt rings. You always seem to break at least one when you change rings. I’d recommend steel, the aly are just to soft & fragile.

    c) You need a good length ratcheting socket wrench, with the right size allen bolt head. You need either a flat screw-driver, or another allen wrench, to hold the other side of the chain-ring-bolt.

    Process is easy, unscrew the bolts, slide the chain-rings off over the crank, slide on the new ones, torque up the chain-ring-bolts :). Then you need to adjust the height of your front dérailleur – loosen the actuating wire, loosen the FD clamp bolt, raise the FD, tighten the clamp & wire, adjust FD as needed.

    Note, you might not find 110mm 53/39 rings – those tend to available only for 130mm BCD. But you can get 52/38 and maybe 36.

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