Rear Sprocket 47T 6.43 BC 520 Chain

The M AND W ALUMINUM PRODUCTS Rear Sprocket 47T 6.43 BC 520 Chain is a precision-engineered driven sprocket designed for high-performance micro sprint racing and specialized motorsport applications. This 47-tooth aluminum sprocket delivers the gear ratio optimization required for competitive off-road and sprint vehicle setups where power delivery, acceleration, and top-end performance are mission-critical.

Built from aluminum for weight reduction without sacrificing durability, this 47T sprocket is engineered to handle the demands of sustained high-RPM operation in micro sprint competition. The 6.43-inch bolt circle diameter (BC) ensures precise fitment to OEM and aftermarket micro sprint rear ends, while the 520 chain pitch compatibility maintains standardized drivetrain integration across competitive platforms. The natural aluminum finish provides excellent corrosion resistance and visibility for maintenance inspection. At 0.77 lbs, the lightweight construction contributes directly to improved power-to-weight ratios—a critical performance factor in classes where lap times are determined by tenths of a second.

This sprocket is specified for micro sprint racers, fabricators, and motorsport shops building or upgrading competitive sprint kits. The 47-tooth configuration provides mid-range gearing suitable for mixed-terrain tracks and varying throttle response requirements. Whether you're replacing a worn original equipment sprocket or optimizing your drivetrain ratio for a specific track condition, this M AND W sprocket delivers OEM-level precision at accessible cost. Stock a backup for race day reliability, or use it as your primary driven gear in high-demand sprint competition environments where every component must meet strict performance tolerances.