29er gearing -how much am I going to loose at the bottom end?

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  • 29er gearing -how much am I going to loose at the bottom end?
  • matthew_h
    Member

    29ers work out about 10% higher geared than a 26″

    The 36t would feel like a 32, or the 22t woudl feel like a 24t on the front or thereabouts.

    I’ve a single ring on my 26er and a 29er SS, with 22-36 you’ll be fine unless you really are built like John Prescot and considder thw wheet content in pie pastry as one of your vegetables.

    lovewookie
    Member

    To be honest I don’t think I noticed the difference on my 29er. Ran the same chainring sizes and the same cassette size. Once you get the wheels turning it’s fine, I imagine you may notice on slow techy climbs, but probably not anywhere else.

    Premier Icon stimpy
    Subscriber

    Went from 26er with 11-32 cassette to 29er with 11-36 cassette.

    Hated it and ditched the 11-36 after three rides; put 11-32 on the 29er and all much better. Stupid pointless dinner-plate sized sprockets that never got used. Want to spin it? That’s what the granny ring is for.

    lovewookie +1

    Ecky-Thump
    Member

    I’m sure I could work it out but I’m equally sure someone already has…
    Before I do anything rash and start looking at any 29ers for my XC bike, it strikes me that I’d be loosing quite a bit of gearing at the lower end.
    I currently use a 22t granny and 11-36 cassette and do use the whole block.
    The equivalent of how many gears would I loose from the low end by going from 26″ to 29″?
    I’ll then see if I can live without the bottom “n” gears for a bit before I get my creditcard out.
    Ta

    Premier Icon GrahamS
    Subscriber

    The Gear Seer website is quite useful for visualising and comparing gearings:
    http://www.andrusia.com/gearseer/#

    As is Sheldon’s gear calculator:
    http://sheldonbrown.com/gears/

    But more importantly you should read this 😉

    Ecky-Thump
    Member

    Cheers guys.
    GrahamS, ooops I promise I’ll lose the loose ‘o’s.

    Stimpy, you need some bigger/steeper hills. I was talking about using all of the 36 with a 22 granny to get up stuff like this on last night’s ride

    Premier Icon roverpig
    Subscriber

    Tyres on a 29er are typically a little narrower than on a 26″ bike. So, using Sheldon’s calculator and assuming a bottom gear of 24×36 (not that it matters for the percentage of course), we get:

    60-559 = 17.6 inches
    56-622 = 19.4 inches

    So the bottom gear on the 29er is 10.2% higher than on the 26″ bike.

    Or, as matthew_h said in the first post “about 10%” 🙂

    Premier Icon njee20
    Subscriber

    Stupid pointless granny rings that never got used. Want to spin it? That’s what the dinner-plate sized sprocket is for.

    FTFY 😉

    Premier Icon stimpy
    Subscriber
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