FSA SL-K Light BB392 Tandem Rear Crankset - 170mm, 50/34t, Black 33200321553031
CHAINRING BCDDirect Mount Fsa. CHAINRINGBCDDirect Mount Fsa. SPINDLEINTERFACETYPE392 Evo. SPINDLE INTERFACE TYPE392 Evo. PEDALSPINDLE9/16". PEDAL SPINDLE9/16". PART TYPEBike / Ebikes. NUMBER OF CHAINRINGSDouble.