New trends in smaller chainrings – plus a motive to craft a lighter oval chainring for mountain bikes, resulted in Direct Mount Q rings. The simplified one-piece design saves approximately 40 grams compared to standard ring+spider+bolts combination (for example, weight savings for a 32t ring is 40g). By machining the direct mount chainrings from a single piece of aluminum, in addition to trimming weight, rigidity gets improved by orienting the aluminum’s unidirectional fibers to take maximum advantage of their properties.
Comparing bottom bracket types and standards.
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