All-City 2 For 1 Dropout Adjustment Hardware. The All-City 2-For-1 Dropout is a sliding dropout system consisting of replaceable dropout plates and fixing hardware. Designed for use with 12mm thru-axles and flat-mount brakes it is compatible only with select All-City models.
Allows riders to convert from a geared to single-speed setup or vice-versa
Compatible only with select All-City models