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Expander rings

mathematicsmathematics Posts: 452
edited September 2018 in MTB workshop & tech
Can expander rings be used wth any cassette?

Or does the cassette just need to be split, so a smaller cog can be removed and the expander slotted on the hub?

Thanks in advance

Chris

10spd

Posts

  • JGTRJGTR Posts: 1,404
    As far as I know you remove one of the higher gears to make room for the larger sprocket.

    You can buy a wide range cassette for a similar price do not really worth messing about with an expanded ring.
  • Some cassettes can't be split, can't say which ones.
    Even the others are not individual gears, they come in clusters of 3 or 4.

    If you are wanting to add (for example) a 42T ring onto an 11-36 x 10 speed, then the one recommended is the 17t. See here:
    https://bikerumor.com/2013/11/28/exclus ... -sprocket/

    This works, as long as your mech arm can make the jump.

    The downside is that you get a big 4t gap (15-19). To counter this, some companies offer an extra small gear in addition to the 42t. In which case you remove the 15t as well as the 17t and install the supplied 16t (and the 42t). The effects is to have two 3t gaps instead of one big 4t gap in the mid range, where you are likely to spend more time.

    See here:
    https://bikerumor.com/2014/04/06/exclus ... ifference/
  • Hi,
    I've recently converted my 2x10 to a 1x10 and used the below cassette
    http://www.chainreactioncycles.com/shim ... prod162566

    Worked perfectly after i'd adjusted the 'b' screw on the derailleur to give clearance for the 42t cog.

    Dunno if that's what you're doing(converting to 1x10) but its an option to consider.

    Phil
  • t0ffeeman wrote:
    Hi,
    I've recently converted my 2x10 to a 1x10 and used the below cassette
    http://www.chainreactioncycles.com/shim ... prod162566

    Worked perfectly after i'd adjusted the 'b' screw on the derailleur to give clearance for the 42t cog.

    Dunno if that's what you're doing(converting to 1x10) but its an option to consider.

    Phil

    Thanks everyone - I think this will be the easiest way to get some easier pedalling.
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