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  1. #1
    Senior Member
    Join Date
    Mar 2008
    northeast GA, USA
    My Bikes
    Trek 820 Antelope (1992)
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    cassette HG20 vs HG50

    I've been convinced that I need to replace ancient cassette and chain when replacing crankset and BB. I have choice of two Shimano 7 speed cassettes 12-28.

    HG20 and HG50. HG20 is the less expensive $13.38 vs $19.20. I can find nothing on the Shimano site about HG20.

    Can anyone tell me the difference?

  2. #2
    Senior Member
    Join Date
    Apr 2009
    New Rochelle, NY
    My Bikes
    too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
    185 Post(s)
    1 Thread(s)
    Most similar cassettes use the same sprockets, and the difference is in things like plating or other cosmetic details.

    Sometimes more dough gets models with the larger sprockets on aluminum spiders vs. sliding directly onto the freehub. That feature is worth paying extra for because it reduces nicking of the freehub body. There are also generational differences with new cassettes having more aggressive shift gates for crisper shifting.

    If you can't see any specific feature that justifies spending more, but the cheaper cassette.
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