campag 56t to 21 actually. its one of the magic ratios for 70.1 gear inches. Like 58/18 and 40/15
wtf?.. i thought "magic gear" is when you have single-speed MTB with vertical drop-outs and no tensioner or something... or what do you mean?..
@scorch started
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wtf?.. i thought "magic gear" is when you have single-speed MTB with vertical drop-outs and no tensioner or something...
or what do you mean?..