Sunrace FC-R31 Crankset Crankset Sunrace Fcr31 170×53/39 Sq 7/8s Sl Review Posted by GiantPandaisy June 28, 2018 in Drivetrain Components This fits your . Make sure this fits by entering your model number. 170×53-39 107mm SQR JIS SIL 130x5B 901g 2×7 LWH 11.7 x 9.85 x 2.20″ CRANKSET SUNRACE FCR31 170×53/39 SQ 7/8s SL Cycling Outdoor Recreation Parts & Components Sports & Outdoors SunRace