Thread: Square taper → hollowtech BB?
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Old 02-02-26 | 09:37 AM
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cyccommute
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Originally Posted by john m flores
Question about using a mountain crankset - would the external cup bb Hollowtech II + mountain crankset push the chainline out further than the original square taper setup? Would Hollowtech II + road crankset counteract that a little?
Yes, mountain externals push the crank further out. That’s because the chainline for mountain bikes is typically wider than road bikes. I run mountain cranks on my touring bike and commuter and have to stack all of the spacers on the left side to get the chainline in far enough to use a road front derailer.
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