Rear - Front sprockets MJ rear sprocket for HUSQVARNA SM 50 11-16 MJ Corse MJ.556 €41.35 High quality duraluminium (ergal) rear sprocket for HUSQVARNA SM 50 11-16 , with chain pitch 415R and 420 and number of teeth from 38 to 60. Select the chain pitch and number of teeth you need by clicking below. Add to cart