Jones Eccentric Bottom Bracket - Jones Bikes - Eccentric bottom brackets
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Eccentric Bottom Brackets – All You Need to Know. “Is an eccentric BB on my mountain bike or my single speed a good idea?”. In contrast an eccentric bottom bracket’s sealed bearings independently rotate as a unit around the geometric center of the BB shell. Eccentric bottom bracket (EBB), for PF30 or BB30 frames. Convert your frame to a single-speed or fixed-gear setup with these simple to use bottom brackets.