e*thirteen e*spec Race Carbon ebike Crank Arm Set - 165mm Brose S Mag Fazua Ride 50 Self Extractor BLK Carbon Fibere*thirteen e*spec Race Carbon ebike Crank Arm Set 165mm Brose S Mag Fazua Ride 50 with Self Extractor Black Carbon Fiber. e*thirteen e*spec Race carbon ebike crank arms are designed to minimal weight and maximum pedaling efficiency. Protective vinyl wrap and boots provide protection for the arms which have additional material on the front and rear faces for impact resistance. 8mm self extractor in each arm Crank bolts included Stealth Black w