2:1 why is so tough- Mtbr.com
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  1. #1
    Rollin' a fatty Moderator
    Reputation: DiRt DeViL's Avatar
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    Bonking ... not feelin' well 2:1 why is so tough

    After receiving my Boone 17t Ti cog couldn't wait to try it so today I took my SS to my favorite trail. From the get go I felt different, the bike felt heavy and on flats and downs I was faster but had a very hard time on the ups. Before I was using a 34:18 combination and was able to do the whole trail without dismounting, today I walked almost all the climbs.

    In my defense I have to say that I rode the geared bike yesterday (~4hrs) and felt tired today but I really wanted to try the 34:17 combination. Now I feel a bit frustrated and considering if going back to the 18t cheapo cog will be better after spending for the Boone cog.

    Any advice?

  2. #2
    mtbr member
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    Might as well give it a few more rides

    Before you decide anything, and if it still feels too tough try a 32/17. Its pretty close to a 34/18. (assuming of course that you're chainring is more average than the new cog)

  3. #3
    Rollin' a fatty Moderator
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    Thanks ATXSS for the suggestion, I'll ride it again on Tuesday afternoon on the same trail to see how it goes.

    Changing the ring makes a lot more sense, I use a Salsa and have a couple of pinned 32s that can be swapped with little effort.

  4. #4
    all hail der Fuhrer Bush
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    lots more work to go 9" further

    34/17=52gear inches=163.3" travel per crank revolution
    34/18=49.1gear inches=154.2" travel per crank revolution
    assuming of cours that your "26 inch" tires are exactly 26 inches in rolling diameter.
    So every crank revolution you're going 9.1" further.

    I run a 34/19 on my MTB fixed gear, it's the highest gear I can handle on the climbs up to the good stuff.

  5. #5
    I am the owl
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    Now your hills are a challenge again. Give it a month or two and see how many of them you can make on the new gear.
    SingleSpeedOutlaw .com
    Riding Bikes and Drinking Beer.

  6. #6
    Rollin' a fatty Moderator
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    Anyone knows where I can find a chart with gear ratios? The info provided by bulC is pretty interesting and would like to study it.

  7. #7
    mtbr member
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    Sheldon Brown

    Quote Originally Posted by DiRt DeViL
    Anyone knows where I can find a chart with gear ratios? The info provided by bulC is pretty interesting and would like to study it.

    has a gear calculator on his web site. Try that...

    Rob

  8. #8
    WAWE
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    Quote Originally Posted by DiRt DeViL
    Anyone knows where I can find a chart with gear ratios? The info provided by bulC is pretty interesting and would like to study it.
    gear inches = front chainring / rear cog * wheelsize

    34 / 17 * 26 = 52.0"

  9. #9
    Rollin' a fatty Moderator
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    Today I took a ride on the same trail, guess what? It felt a lot better and at least I was able to do the longest climb. It took a lot from me but as atxss and riderx suggested I'll give it sometime before changing the combination, anyway I ordered a 32t Salsa ring just in case.

    Thanks to all for the help.

  10. #10
    mtbr member
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    try the United Bicycle Institute site>>>

    Quote Originally Posted by DiRt DeViL
    Anyone knows where I can find a chart with gear ratios? The info provided by bulC is pretty interesting and would like to study it.
    www.bikeschool.com
    There is a great gear calculator. Enter the rings and cogs that interest you and it shows a gear chart for that combination, plus the entire gear chart for all combinations.

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