JT SPROCKETS Steel Standard Rear Sprocket 839 - 428 JTR839.57

With their leading edge technology and using only the highest grade of special steel alloys, JT Sprockets produce a full range of superior quality motorcycle front and rear sprockets. Ultra-durable high carbon C49 steel Chain_pitch: 428.0 Material: Steel Rear_sprocket_teeth_count: 57.0 Rear_sprocket_type: 839 Rear_sprocket_version: Standard