Shimano SF-1200 16t Freewheel for 1/2″ x 1/8″ Chain Review Posted by GiantPandaisy June 19, 2018 in Drivetrain Components This fits your . Make sure this fits by entering your model number. SHIMANO : SF-1200 FreeWheel 1/8×1/2 16T Shimano article number I-SF120016 Cycling Outdoor Recreation Parts & Components SHIMANO Sports & Outdoors