JT Sprocket,s 520 Steel Rear Sprocket, 49T | MotorcycleParts2U JT Sprockets JTA822.49 Motorcycle Sprocket JT Sprockets JTR215.49 49T Steel Rear Sprocket Jamaica CNC Machined Motorcycle Sprocket Available sizes: 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53. Material: C49 High Carbon Steel. Alternative type: JTA822BLK (Racelite Aluminium Rear... All Of JT Aluminum Sprockets Are Computer Designed To Combine The Ultimate Strength At Minimum Weight And They Are Cnc Machined To Aviation Tolerances. Driven Racing Rear Sprocket - 44 Tooth 5008-520-44T Sixty61 Made Of Austrian 7075-T6 Aluminum Alloy, They Feature Meniscus Shaped Self-Cleaning Grooves On All The Teeth On Both Sides.