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  1. #1
    Senior Member
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    How important is bottom bracket sizing?

    My bike needs a new bottom bracket. From the manufacturer, I need a 68x108mm BB.

    68x110 is a little cheaper, and I don't think it would be too different, might have to make some adjustments to the front derailleur, but it wouldn't be that bad. eh?

  2. #2
    Bikaholic blamp28's Avatar
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    Dec 2006
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    Western, Michigan
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    Trek Fuel 90, Giant OCR, Rans Screamer Tandem
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    What bike? What Crank? What type of riding? More infor would help.
    Trek Fuel XC MTB, Giant OCR Road Bike, Rans Screamer - Tandem

  3. #3
    Senior Member CACycling's Avatar
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    Feb 2008
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    Oxnard, CA
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    '08 Fuji Roubaix RC; '07 Schwinn Le Tour GS; '92 Diamond Back Ascent EX
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    Assuming your BB is not asymetrical, you will only be moving your chainline 1mm (the other 1mm will be on the NDS) which isn't much.

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