Rear Sprocket 48T 6.43 BC 520 Chain

The Rear Sprocket 48T 6.43 BC 520 Chain is a precision-engineered aluminum sprocket designed for micro sprint racing and high-performance go-kart applications. Built by M and W Aluminum Products, this 48-tooth rear sprocket delivers the gear ratio and durability demanded by competitive motorsports enthusiasts. The 520-pitch chain compatibility and 6.43-inch bolt circle diameter make this sprocket an ideal choice for drivers seeking reliable acceleration and consistent power delivery on both dirt and asphalt tracks.

Constructed from lightweight aluminum, this sprocket reduces unsprung weight while maintaining the structural integrity required for sustained racing conditions. The 48-tooth design optimizes the power band for micro sprint platforms, offering a balanced compromise between acceleration and top-end speed. The natural aluminum finish resists corrosion and provides excellent durability, while the precisely machined 6.43-inch bolt pattern ensures a secure fit on compatible hubs. At just 0.77 lbs, the sprocket's minimal weight contributes to improved handling and reduced rotational inertia—critical factors in competitive racing where every fraction of a second counts.

Micro sprint racers, go-kart competitors, and performance enthusiasts will appreciate the engineering and reliability of this rear sprocket. The 520-chain pitch compatibility ensures seamless integration with standard sprint and kart drivetrain systems, making replacement and upgrades straightforward. Whether you're fine-tuning your gear ratio for track conditions or building a complete sprint platform, the Rear Sprocket 48T 6.43 BC 520 Chain delivers the precision and performance expected from M and W Aluminum Products' reputation for motorsports excellence.