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  1. #1
    mtbr member
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    Jun 2005
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    67

    gearing question

    Does anyone ride a 33x19? I've been riding 34x20 for the past 5 years and recently after some bb issues (i won't go into), I had to switch my rear cog to a 19. At first it seemed OK with the 34 but on long sustained climbs it gets a little steep. I don't have the option of going 32 up front, since I'm running a Phil W square taper bb and my cranks are standard 110bc. I have managed to find a 33 110 chainring and wonder how that set up will compare to the 34x20. I do remember reading it's not a good idea to run odd number gears,better to stick to evens,can't remember why tho. Anyhow any thoughts on this would be appreciated. If I have to stick w/34x19 I'm sure I'll get stronger eventually!

  2. #2
    (Ali)
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    Join Date
    Sep 2006
    Posts
    782
    It is simple math (division) actually. Smaller the ratio, easier to spin:

    34 / 20 = 1.7
    33 / 19 = 1.737

    Percent increase is (0.037 / 1.7) * 100 = 2.2

    Yes, you are feeling a 2.2% increase!

    Ali

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