XAM’s 7075 T6 Alloy rear sprocket fits go karts using #219 chain.  7075 T6 is a high strength alloy used throughout the aerospace, marine, and transportation industries.
7075 alloy contains more strength that 6061, giving it higher strength and stress resistance.  This makes 7075 T6 a perfect material for constructing premium, long life rear sprockets for go karts using #219 chains.