Bottom brackets - everything you need to know | fourthway.info - 55 mm oversize bottom bracket
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The bottom bracket on a bicycle connects the crankset (chainset) to the bicycle and allows the .. Some downhill bikes even use an 83 mm bottom bracket shell. 68 mm, 73 mm (oversize), 83 mm (some downhill & FR bikes), mm ("fat bikes") bracket shell inner diameters vary between manufacturers from 42mm-55mm. Dogma Full Power Advertising excerpt: "The fourthway.info 55mm oversized bottom bracket shell increases stiffness with greater resistance to flex.