12-30 cassette

cste
cste Posts: 181
edited March 2015 in Workshop
Hi,

I'm running a compact chainset with 11-28 cassette. Would changing to a 12-30 make much of a difference on climbs?

Thanks.

Comments

  • Zerotails99
    Zerotails99 Posts: 127
    If you're using the existing 28 a lot and can't keep the cadence going, then yes you will benefit from the 30. Running out of gears is not nice.
  • DKay
    DKay Posts: 1,652
    I went from a 11-28t to a 12-30t and the additional two teeth are welcome around North Yorkshire. It does make a difference.
    N
    N+1
  • BazookaMoor
    BazookaMoor Posts: 77
    I currently have a Campag setup running a 12-27 cassette with a 50-34 chainset and everything works fine using a short cage rear mech. Am interested in the 12-30 cassette for tougher climbs but wondered whether I could still use a short cage rear mech.
  • peat
    peat Posts: 1,242
    edited March 2015
    A Shimano short-cage accomodates a 30T, but you would need to check with Camag.

    EDIT: See caveats below
  • kajjal
    kajjal Posts: 3,380
    12-30 is also useful if you are having a bad day and everything seems hard work or you just want to take it very easy.
  • homers_double
    homers_double Posts: 8,238
    I did exactly the same for a trip abroad last October and having that extra gear did make the difference on longer climbs where you just want to spin it out.
    Advocate of disc brakes.
  • DKay
    DKay Posts: 1,652
    Peat wrote:
    A Shimano short-cage accomodates a 30T, but you would need to check with Camag.

    One caveat being that your rear mech hanger allows sufficient b-screw adjustment.
    N
    N+1
  • southdownswolf
    southdownswolf Posts: 1,525
    7.1% difference according to Sheldon Brown.....

    Not inconsiderable.
    http://www.stuartmole.co.uk/
  • dj58
    dj58 Posts: 2,223
    edited March 2015
    cste wrote:
    Hi,

    I'm running a compact chainset with 11-28 cassette. Would changing to a 12-30 make much of a difference on climbs?

    Thanks.

    What rear derailleur do you have? viewtopic.php?f=40004&t=12958217&p=18736529#p18736529
  • markhewitt1978
    markhewitt1978 Posts: 7,614
    My bike came with 12-30 but I tried 11-28 for a while and on the tougher long climbs in the Pennines I was longing for something lower - added to the fact I never used the 11T I've gone back to 12-30 now and I'm going to stick with that!
  • rafletcher
    rafletcher Posts: 1,235
    Peat wrote:
    A Shimano short-cage accomodates a 30T, but you would need to check with Camag.

    And depending on rear dropouts a 32 - which is emphatically I'm running (with 48/36) on my Genesis Equilibrium and a 105SS rear mech.

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