Rear Sprocket 50T 5.25 BC 520 Chain

The Rear Sprocket 50T 5.25 BC 520 Chain is a precision-engineered drivetrain component specifically designed for micro sprint racing applications. Its reliability and consistency are crucial for competitive racing, where performance can make a significant difference. This 50-tooth rear sprocket acts as the final drive reduction point in your power delivery system, optimizing acceleration and top-end speed.

Constructed from lightweight aluminum, this rear sprocket features a 50-tooth profile optimized for 520 roller chain engagement. It has a 5.25-inch bolt circle diameter, ensuring secure OEM-pattern mounting. The natural aluminum finish helps resist corrosion while maintaining a low unsprung weight, which is essential for minimizing rotational inertia and reducing gyroscopic load on suspension geometry.

Micro sprint teams and weekend racers alike rely on this sprocket for consistent performance throughout their racing events. Proper installation requires standard metric tools and verification that your existing 520 chain and countershaft sprocket maintain the correct tension and alignment. This sprocket is designed to enhance throttle response and extend the lifespan of drivetrain components under high-RPM conditions.