26"---->29" gearing question- Mtbr.com
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  1. #1
    L&L
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    26"---->29" gearing question

    I have a 26" gearie and would like to see how fast i would travel per reveloution of the cranks on a typical 29" SS with 2:1 gearing. Taking into account my smaller wheels, what gear would be the closest approcamation to the avarage 29er SS?

    Thank you for any help.

  2. #2
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    Are you sure you want a 2:1 on the 29er? It's going to be a bit stiffer than a 2:1 on a 26"

  3. #3
    L&L
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    The 26" has gears, and always will. The point of this post was for someone who has not ridden a SS since his last BMX (thats me), get an idea of how fast i would travel per turn of the cranks on a 29" SS. I figured i could select a gear on my 26" just to see. I want to build up a 29er just for the fun of it.

  4. #4
    Nat
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    Add two teeth to the rear cog on the 29er.

  5. #5
    L&L
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    So a 36:18 on a 29er is roughly = a 36:16 on a 26" ? (only in the the turn of the crank/ distance traveled aspect)

  6. #6
    Nat
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    Quote Originally Posted by L&L
    So a 36:18 on a 29er is roughly = a 36:16 on a 26" ? (only in the the turn of the crank/ distance traveled aspect)
    Correct!

  7. #7
    pvd
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  8. #8
    L&L
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    Thank-you everyone for your quick replies.

    pvd your link is alsome...it's exactly what i was looking for.

  9. #9
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    Translation

    Another easy way to translate is to take your ratio: 36/18 = 2 , then multiply by the wheel diameter x 29" = 58" gear. For a 26er 36/16 x 26= 58.5"
    Gear inches are the universal wheel size language

  10. #10
    L&L
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    Taking a look at the spec's on my 26" gearie, the closest i can come to matching a 2:1 on a 29er is 32:14 which will have me traveling alittle faster then the 29er at 2:1, but will give me an idea if i can live with a SS as a play bike.

  11. #11
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    32:14 may be a stiff gear on a 29er, assuming you have lots of hills where you're riding. Steep stuff will be a real grunt. 4 over a 2:1 ratio is a great all around SS road bike gear (like a 40:18) I know I couldn't pull it off for long on our short steep up/down trails.

    I've run 32:15, 32:16, 32:17 and 32:18 on my 26er and 34:18, 32:18, 32:20 and 32:22on my 29er. The closest combos on the 29 to match my 26 has been acheived by adding 2 teeth in the back.

    Swap cogs and give it a whirl though, everyone is different and it could be the perfect gear for you. Let us know how it goes.

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