width of chainsets

Discussion in 'Bicycle Mechanics and Repairs' started by cyberknight, 4 Mar 2018.

  1. cyberknight

    cyberknight Bullied off cc

    Does the width of a chainset chain rings vary ?
    Put a "cheap " fsa powerdirve chainset in and although i have a 10 speed microshift FD the chain rubs in either the top or bottom gear .
    Cant remember it rubbing on the hollowtech 2 BB fsa chainset
  2. Cycleops

    Cycleops Guru

    Accra, Ghana
    I imagine you mean between the two/three chainrings. Seems like they do , have you compared them? You just need to adjust the h/l screws.
  3. OP

    cyberknight Bullied off cc

    Nope double to double
    both compact hollowtech 2 to fsa powerdrive.
    LBS claims my front mech is 9 speed but it is 10 speed although on further reading microshift is a bit pants .
  4. OP

    cyberknight Bullied off cc

    asking on a boardman facefluff page and a tech has basically told me the microshift mechs are renowned for rubbing
  5. chriscross1966

    chriscross1966 Senior Member

    Yes, each company has their own take on the perfect chainline, though some of them are pretty close.... I have endless fun putting aftermarket (generally Campagnolo Ultratorque) chainsets and bottom brackets in my Bromptons...
  6. si_c

    si_c Veteran

    If you've changed the chainset, then it is likely that the position is subtly different from the previous one, so you may well need to adjust the high-low limit screws, and possibly the cable tension to remove the rub, might take a bit of trial and error.
  7. OP

    cyberknight Bullied off cc

    Done that , it either rubs top or bottom, cant get it right .
    On further reading the FD is a microshift jobbie that is renowned for being a bit pants so I am on the hunt on fleabay for a sram FD to match the rest of the groupset .
    si_c likes this.
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