I have an older bike (three years old) with a Shimono Sora group with a front triple chain ring on it.
I would like to install a double on it. Can I just purchase a 105 crank set and bolt it onto the old BB or do I need to get a new BB hub also?
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I have an older bike (three years old) with a Shimono Sora group with a front triple chain ring on it.
I would like to install a double on it. Can I just purchase a 105 crank set and bolt it onto the old BB or do I need to get a new BB hub also?
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