SUPERSPROX Countershaft Sprocket - 16-Tooth CST-1591-16-2

A countershaft sprocket is only as good as its durability under load, and factory racing teams don't compromise on this component—neither should you. The SUPERSPROX CST-1591-16-2 delivers the precision engineering and material science that separates reliable power delivery from premature wear and power loss. Whether you're running high RPMs on the street or pushing through abrasive off-road conditions, this 16-tooth sprocket is built to handle the abuse without breaking stride.

This sprocket uses SCM-435 carbon-free steel, impregnated to eliminate breaking risk while extending service life far beyond standard alternatives. The ultra-hard surface layer reduces friction at the chain interface, preventing the incremental power loss that compounds over a season of riding. Radial lightening holes shed unnecessary weight without sacrificing structural integrity, while grooved teeth accelerate dirt evacuation—a feature pulled directly from factory racing specifications.

• 16-tooth countershaft
• SCM-435 carbon-free steel
• 0.5mm ultra-hard surface
• Radial lightening holes
• Grooved tooth design
• Factory racing specification
• Zero-break impregnation
• Reduced friction coating
• Bolt-on installation
• Off-road and street rated