Sprocket Details:
#420 Chain
38 Tooth
Center hole ID: 49mm (1.93″)
Mounting holes: 58mm center to center side by side
Mounting holes: 82mm center to center across
Constructed of high-quality, aerospace grade 7075 T-6 aluminum
Computer-designed weight reduction holes for the best combination of lightness, strength and stability
Exclusive tooth-valley design provides 24% better chain contact area for the best power transfer possible
Finished with a clear anodized coating that adds durability and a superb finish
Cleaning grooves added at bottom of tooth area