18000, yes that is steel.
Did you consider the SuperSprox Stealth rear sprocket? It has a hardened steel chain wheel affixed to an aluminum carrier, thus combining the advantages of hardened steel teeth, while saving weight elsewhere.
Did you consider the SuperSprox Stealth rear sprocket? It has a hardened steel chain wheel affixed to an aluminum carrier, thus combining the advantages of hardened steel teeth, while saving weight elsewhere.