1. The most important thing about buying a new bike is to make sure it fits. The only way you'll know if the bike is right for you is to size up the bike and make sure that the bike's geometry matches your body's geometry. Ask questions and do some research.
mtn. biking 101
2. If possible, try to find a shop that will let you demo the bike on real dirt. Five minutes in a parking lot won't cut it. You wouldn't buy a car without a real world test drive, and a bike should be no different.
3. Don't belive the hype. Just because your favorite rider or best friend rides a certain bike, that doesn't mean that's the best one for you. Have an open mind and be realistic about your needs and ability.
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Thread: Derailleur ?

  1. #1
    Work Hard, Play Harder
    Reputation: Ice25gt's Avatar
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    Derailleur ?

    What's the difference between a long cage and a medium cage derailleur? Do you need a certain setup to run one or the other or is it a matter of preference. What are the benefits of either one? Just curious, because i saw 06 model sram X-0 derailleurs on sale on the net for 149.00 I think that'd be a nice upgrade from my X-9. I have seen these for sale at my LBS for about 250.00 so it seems to me like a steal. Any info you guys can give me is always appreciated. Thanks in advance.
    06 Rocky Mountain ETSX - Full XTR, Fox Shox, Crossmax XL Wheels

  2. #2
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    Reputation: oldskoolbiker's Avatar
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    The difference is how much slack in the chain the derailleur can absorb. If you are running a 2X9 setup a medium cage will be fine. You can use a medium cage on a 3X9 setup, but if you shift into your small/small gears the derailleur won't be able to handle the slack and your chain may flop off. Some people use a medium because it will shift a little better than a long, and they just be careful not to shift into the small/small gears. Which those are cross chained gears you shouldn't use anyway.

    Technically the Long cage SRAM has a capacity of 45, and the Medium 37.

    Capacity is calculated like this:

    Large Front - Small Front + Large Rear - Small Rear = Capacity
    44 - 22 + 34 - 11 = 45 (normal 3x9 setup)

  3. #3
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    Nice explanation oldskool, and very much appreciated. I've never upgraded a derailleur before so I had no idea what the differences were. Thanks
    06 Rocky Mountain ETSX - Full XTR, Fox Shox, Crossmax XL Wheels

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