#40 18T Sprocket 1″ Bore w/ Key & Set Screws – Rust-Proof

Upgrade your mini bike or go-kart with this high-performance #40 18-tooth rear sprocket from HJGuamou, engineered for balanced speed and durability. With a durable 1" bore, 1/4" × 1/8" keyway, and two set screws, this sprocket ensures a secure fit on your 1" axle, preventing slippage during operation. The black oxide rust-proof finish provides superior corrosion resistance, making it ideal for outdoor use in wet or challenging conditions, while maintaining a sleek appearance.

Constructed from hardened 1045 steel with heat-treated teeth, this sprocket is built to last, offering quiet operation and an impressive lifespan of over 15,000 hours. Beyond mini bikes and go-karts, it’s also a reliable choice for light-duty conveyors, farm equipment, and various industrial applications, delivering consistent performance and value.