MTB rear mech on road bike

mr_eddy Posts: 830
edited April 2013 in Workshop
I have an old Giant Speeder road bike (early 90's I think), its got Shimano Exage 400ex downtube shifters specifically friction shifter for the front mech (Biopace double) and a index rear downtube shifter 7 speed. The rear freewheel is a shimano screw on 14-28.

My current rear mech (400ex) has finally given up the ghost so I need to replace with a suitable 7 speed rear mech, I have seen a few options. I have seen a new Shimano Altus rear mech , its cheap and most people suggest the Altus is a perfectly functional rear mech: ... 484e89bb83

The description states for use with 28-34 tooth sprockets, its also specifically designed for 7/8 speed setups so I am thinking it should be fine.

I have tried looking for like for like replacements but they all seem as bad as mine, The modern stuff like Sora or Tiagra only seem to be designed for 9speed + so I don't think they will be suitable.

With an Altus 7/8 speed MTB rear mech work with my old road bike ?


  • nicklouse
    nicklouse Posts: 50,675
    any shimano rear mech. as it is not indexed it does not matter.

    if it was indexed then any shimano rear mech except for the new MTB 10spd ones.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • estampida
    estampida Posts: 1,008
    any shimano one will fit

    look for a short cage version so it does not stick out

    and check microshift mech's, shimano compatible (usually an older design) and cheaper than getting a new LX rear mech or summit
  • mr_eddy
    mr_eddy Posts: 830
    Thanks for all the info, I will get myself a new mech then. Cheers