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  1. #1
    610
    610 is offline
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    Why do some CX bikes run a single ring in front?

    inquiring mind want to know!
    Hotdogs give me energy to fight off my daddy

  2. #2
    Cross Fan Merckx Rider's Avatar
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    Many cx courses don't require the use of a large chainring, using a sinlge ring (with guards) saves a little weight and is one less part of the drivetrain to get fouled up with mud. Most riders use a mid size ring like a 42 this way they can get both some speed and climb.

  3. #3
    Senior Member greybeard87's Avatar
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    Simplicity = improved reliability.... hopefully
    [SIGPIC][/SIGPIC]Peace and Bike Grease

  4. #4
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    Also, since you have only one ring, you can shorten your chain. This reduces the likelihood of dropping your chain, assuming you're using some form of a chainguard / chainkeeper up front. I've been running a 38t x 12-28 combination for years, in conjunction with a DA short-cage rear derailleur, and I have never dropped a chain.

  5. #5
    Senior Member ronbridal's Avatar
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    I ran a 42 tooth chainring with a 12-27 cassette in the back. This gave me all the gears I needed for the courses I raced on. In addition, I didn't drop a chain in any race because I used a chain guard on each side of the chain. I am changing bikes for next year though, and may run a double up front, I am undecided. Ron

  6. #6
    Made in Norway Lectron's Avatar
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    Single 42 with a ten speed 11-28. Saves weight, gives me all the gears I need.
    If anything should demand lighter gears than 42-28, I would probably be shouldering the bike anyway.
    Quote Originally Posted by The Dude
    Weight weenieness is a disease very often caused by the lack of good results. Just a few steps below doping in terms of desperation

  7. #7
    Member jaqb's Avatar
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    Lectorn has right, in my winter bike cyclocros EMPELLA i've 42 and 11-28, those gears are best for me too training and competiton.

    Simply and lightnes quick shift and no problems.

  8. #8
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    Simpler, lighter, cheaper, sturdier - how often do you get all that at once.

    Why carry more parts around than you need. Most cross courses don't have long enough paved sections to do a lot with the big ring and if you need a granny gear you'd go faster running so why have the extra stuff on your bike.

    Ron

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