The Paul Chain Keeper BB Mount can accommodate a range of chainline measurements and chain rings from 28 to 39 teeth in size. It weighs less than a light road derailleur, and looks better, too. It's compatible with frames with 68mm or 73mm shells, and will work with Hollowtech II, MegaExo, Giga-X-Pipe and other outboard bottom brackets. Check the Paul Fit Guide for more detailed information.
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