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  1. #1
    Senior Member
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    Using a mountain crankset on a 700c touring bike

    Does anybody have a problem using a mountain crankset on a bike with larger wheels and a lower bottom bracket? I was thinking of using a crankset with a 44 or 42 big ring on a bike with 700c wheels. I noticed that the chainstays tilt up more on bikes with 700c wheels and lower bottom brackets than they do with mountain bikes that use smaller wheels and a higher bottom bracket. I haven't tried it yet, but I am concerned that the front derailleur will hit the chainstay. What is the smallest chainring that one can use to avoid this?

  2. #2
    Slow and unsteady
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    I purchased a Trek 520 with 700c wheels. I had the Shimano 105 crankset with 52/42/30 chainrings relaced with a Deore LX crankset with 44/32/22 chainrings.

    Works great. No problem at all with the front derailer. Many people make the same switch. Bruce Gordon makes a line of touring bikes that come with 700c wheels and 44/32/22 MTB cranks.

  3. #3
    aspiring wannabe hoogie's Avatar
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    timaru/oamaru, new zealand
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    you should have no problems chaining it ... Cannondale touring bikes have MTB cranks and 700C wheels ... I have installed an LX crank on my Trek 520 and still use the stock 105SC front deraileur and it works fine ... mind you, I also changed the drop bars for flat ones with LX brakes/shifters ...

    cheers,
    hoogie
    timaru/oamaru, new zeland

  4. #4
    Senior Member Patch29's Avatar
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    I have a 58cm Surly Long Haul Trucker with XT 44/32/22 and XT 9spd rd 11-34. It works very well.


  5. #5
    Senior Member
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    Thanks for the replies. I will give it a try.

  6. #6
    aspiring wannabe hoogie's Avatar
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    Quote Originally Posted by Patch29
    I have a 58cm Surly Long Haul Trucker with XT 44/32/22 and XT 9spd rd 11-34. It works very well.

    Very nice indeed! definitely bike porn! Sadly the Surly LHT frame wasn't around when I bought my touring bike or I would have looked seriously at this as well ...
    cheers,
    hoogie
    timaru/oamaru, new zealand

  7. #7
    Senior Member Patch29's Avatar
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    Quote Originally Posted by hoogie
    Very nice indeed! definitely bike porn!
    Thanks, you can find more photos here if you have not seen them before.

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