Sugino Mighty crankarms, copied closely from Campagnolo Record. Predecessor of and superior to Maxy, with one-piece forged arm/spider instead of swaged. 144mm bolt circle diameter (42-tooth minimum, except for a few exotically machined 41s), 171mm length. Date code indicates 1971, appropriate for some of the earliest conversions of old-school BMX bikes to "alloy cranks." Sold as-is. Please see pictures and description. Message us with any questions. Your purchase benefits our 501c3 nonprofit organization. We offer programs and bikes for kids and schools, organize events and rides, and operate a full-service bike shop in southwest Washington state.
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