Ultralight Rear Sprocket Renthal Rear Ultralight Sprockets: Manufactured to extremely tight tolerances from a special material developed to withstand the stress of Supercross, Motocross and Enduro. 7075 T6 aluminum alloy rear chainwheels are 66% lighter than steel, yet incredibly durable. Advanced tooth profile, concentricity and accuracy of fit provide maximum power transfer and long-life. Combination of a very high strength base material and an exceptionally hard-wearing surface result in significantly increased chainwheel life. Self cleaning mud grooves help prevent dirt build-up.
_________________________________________________________________________________________________________________________________________________ FITMENT CHART

2006	KTM	250
2007	KTM	250
2008	KTM	250
2009	KTM	250
2010	KTM	250
2011	KTM	250
2012	KTM	250
2012	KTM	350
2003	KTM	450
2012	KTM	450
2012	KTM	500
2013	KTM	150
2009	KTM	530
1997	KTM	620