Cassette Cog size- Mtbr.com
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  1. #1
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    Cassette Cog size

    I'm looking for a new cassette and I noticed that they offer two sizes, one goes from 11-32 and the other from 11-34. What are the pros and cons for this?

  2. #2
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    11-34 cassettes are good if you are climbing lots of steep hills. for most riding thought an 11-32 cassette will work just fine. 11-32 cassettes are a tiny bit lighter than 11-34 ones. just make sure your chain is long enough if you go from an 11-32 to a 11-34 cassette.

  3. #3
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    Somehow I always end up with 11-34 cassettes but I never use the 34t gear, its just way to easy of a spin and cadence gets out of control even on the steep stuff. Also there is a smaller tooth jump on 11-32 than 11-34.

  4. #4
    maker of trail
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    it really depends on what you have on the front.

    If you're running in the granny a lot, then 11-34 is probably overkill, if you prefer to stay on the middle ring (or run 1X9 like I do, with a 32 up front) then the 34 gives you a bit easier ratio, I changed from 11-32 to 11-34 and it was just enough of a change to allow me to keep riding up some stuff, now I'm fitter and could probably do ok with 32 or 28 etc.

    It also depends on what you ride... if you have lots of long sustained climbs then the granny + 34 might be needed...

  5. #5
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    The major points have already been hit, but I do want to point out that it isn't just the last cog that is larger..

    Other than the first cog, every gear on an 11-34t cassette is 1 or 2 teeth easier. Cogs 2 through 4 are 1 tooth larger, and the rest are all 2 teeth larger

  6. #6
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    Thanks for the good info everyone. Really appreciate it.

  7. #7
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    Check the rear mech can handle a 34t cog. Some older ones can't.

    Also some just have a higher last jump - the rest of the ratios can be the same as an 11-32.

  8. #8
    Old man on a bike
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    There are more choices in cassettes than 11-32 vs 11-34...but the differences between those two ranges are as those have already said...
    "...the people get the government they deserve..."
    suum quique

  9. #9
    Vaginatarian
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    one more point , some 11/32 cassettes have a 4 arm carrier, Ive bent several cassettes with 4 arm ( not enough support between the arms in the 32 gear)

  10. #10
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    I went with the 11/34. I figure the bike is heavy, I can use a little help.

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