New 105

Barts
Barts Posts: 15
edited November 2014 in Road buying advice
I have the new 11speed 105 on my new bike but wish to change the 12-25 cassette on the back to a minimum of 12-28 or preferably a 30 tooth ring, I have been told by a couple of people if I go to a 30 tooth cassette I won't need to change the rear mech but I always believed anything more than a 28 on shimano needs a long cage mech.Please help

Comments

  • diamonddog
    diamonddog Posts: 3,426
    All the info required is here in the relevant derailleur section.
    http://cycle.shimano-eu.com/publish/con ... 5700.html#
  • Anonymous
    Anonymous Posts: 79,667
    I have 105 with ann 11-28. Done 204 miles. Happy to swap if you want as I don't need the ratios

    Based in London
  • paul1000
    paul1000 Posts: 190
    30 will work fine.
  • DKay
    DKay Posts: 1,652
    edited November 2014
    Shimano don't do an 11-speed cassette with a 30t option. Your options are 11-28t or 11-32t, the latter of which will need a medium rear cage.

    Edit: Campag do an 11-speed 12-29t cassette though.
    N
    N+1
  • antonyfromoz
    antonyfromoz Posts: 482
    I am not sure about 105 but i am running a 11 - 32 cassette on a short cage 9 speed Sora derailleur with no problems at all.
  • freezing77
    freezing77 Posts: 731
    I think it depends on the hanger/ frame set up.
    I am running an 11-32 cassette with a shimano 105 short cage. This is on a Ribble Gran Fondo
  • dj58
    dj58 Posts: 2,223
    Buy the cassette first and try it making the necessary adjustments to the derailleur, check the chain length.
    BTW there is a post in Road Beginners (Help I need smaller gears - what can I do? A Guide), second post from the top, 16 pages of useful information.

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