SUPERSPROX Countershaft Sprocket 13-Tooth CST-1901-13-4

Made from SCM-435 carbon-free steel and impregnated to guarantee zero breaking risk and extended sprocket life, Ultra-hard surface layer (.5mm) reduces friction to prevent power loss caused by chain drag, Fully lightened with radial holes for off-road and street applications, Grooved teeth for off-road applications, just like our factory racing parts, allowing fast dirt removal, Real Factory Team specification parts from the company supplying real factory teams