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Long or short cage mech for 50-34 / 11-28?

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  • April 15, 2015 at 4:38 pm #23750
    druff

    Hi,

    I’m currently running an 11-32t cassette in conjunction with 50-34 chainset. In order to do this, the bike shop I bought the pieces through advised that I should run a long cage rear mech.

    I’m going to change the cassette at the rear for an 11-28t and have a short cage mech available. One of the reasons for swapping cassettes is a result of the fact that I’ve never been able to get the indexing quite right; the bike shop I used in the first place made me aware of the fact that this would be likely as it is pushing the derailleur to its limit.

    I have a newer short cage derailleur in my spare parts bin. As I am reducing the size of the cassette, is the long cage mech necessary, or is a short cage sufficient?

    Thanks, Dan.

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Viewing 12 replies - 1 through 12 (of 12 total)
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  • September 24, 2015 at 11:10 am #841743
    0
    CXR94Di2

    Yorkshie Whippet

    Yorkshie Whippet wrote:
    Cxr94di

    Two things come to mind, better with a longer cage mech and will need a new longer chain.

    If I was doing this for myself I would put on a larger derailleur and chain if needed, but his budget was tight and time was short. With my fiddling of cassettes and a little research it indicated this was actually a quick fix for a heavy rider doing his first very hilly 100 mile sportive

    September 23, 2015 at 7:23 pm #841741
    0
    Yorkshie Whippet

    Cxr94di
    Two things come to
    Cxr94di

    Two things come to mind, better with a longer cage mech and will need a new longer chain.

    September 22, 2015 at 7:48 pm #841739
    0
    FatAndFurious

    The short cage works fine for
    The short cage works fine for me on Ultegra 6700 50/34×11/28

    September 22, 2015 at 6:53 pm #841737
    0
    nortonpdj

    Ultegra 50 34 works perfectly
    Ultegra 50 34 works perfectly with 12 30 on a short cage.
    It will work with a 32 on a short cage if you adjust the b screw (you may have to reverse the screw – this depends on your frame/hanger), but you *must* avoid cross chaining.

    September 19, 2015 at 5:03 pm #841735
    0
    CXR94Di2

    Resurrecting this,
    I have
    Resurrecting this,

    I have just fitted an HG80 11-34 to my mates Boardman with a short cage derailleur. He had a 12-26 before. His chain set is 50/34 He cannot cross chain on the large front gear but can use the 30t easily. On the small chainring he can use all of the cassette

    He wanted a large range cass for his first 100 mile sportive, which is the wiggle peak punisher. What a course to pick!

    April 15, 2015 at 8:44 pm #841733
    0
    OnTheRopes

    Short will be fine up to 28
    Short will be fine up to 28

    April 15, 2015 at 7:17 pm #841731
    0
    2 Wheeled Idiot

    Short will be fine….sound
    Short will be fine….sound like new bike shop time if they can’t adjust rear derailleurs properly :/

    April 15, 2015 at 7:11 pm #841729
    0
    druff

    Thanks all. It’s a 105 rear
    Thanks all. It’s a 105 rear mech, probably about 3 years old, albeit hardly used.

    April 15, 2015 at 6:50 pm #841727
    0
    bikebot

    You can even just about use a
    You can even just about use a short cage on an 11-32 if you’re careful not to cross the gears. I have that on my CX, which works fine as it’s a 36/46 on the front so less total reach.

    April 15, 2015 at 6:41 pm #841725
    0
    WDG

    That’s a short cage. I run
    That’s a short cage. I run 11-32 so have a medium.

    April 15, 2015 at 6:37 pm #841723
    0
    Bedfordshire Clanger

    What rear mech are you using?
    What rear mech are you using? The manufacturer will give technical specifications stating the maximum recommended number of teeth that the mech will handle. The number will vary according to make and model.

    April 15, 2015 at 6:35 pm #841721
    0
    Batchy

    I have no problems using a
    I have no problems using a short cage rear mech with 11 -28 and 52 /36 chain set. Shimano Ultegra 6700 mech and sprockets 6800 chain set. So 50/34 should be not be any different .

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