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front mechs and chainrings

dirtbiker100dirtbiker100 Posts: 1,997
edited December 2008 in MTB buying advice
Thinking of running a dual ring setup on the front (currently only 1 ring) and wondering what is the biggest difference in chainring sizes you can have on a normal mech? 22 -34 is usual but can you go to 22-36 or something?

also seen this mech: ... elID=27691
which says its suitable for dual rings 22-36. can I use 24-38 instead? I guess it just comes down to moving the mech up and down the seat tube?


  • 22 - 36 is OK with a 'normal' mech too.
    More freerange chicken than Freeride God
    Bighit , 5 , BFe
  • supersonicsupersonic Posts: 82,708 Lives Here
    You can do these ratios, but not ideal. New SLX double sorts this out. Or maybe that saint.

    Carefully check the numbers.

    Though... in a pinch what you have with a tweak is often good ;-)
  • a tweak? how easy is it to mod it to make it more suitable?
    went n bought a deore mech for £14 for the cheapness but now thinking i should've gone with the double!
  • I run 26 - 36 now, so less of a jump from one to the other.

    I used to run 22 - 36 though.

    You can buy 24 - 36 with bashring cranksets so that must be OK still.
    More freerange chicken than Freeride God
    Bighit , 5 , BFe
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