A less axpensive alternative to the 7075 sprockets available. 420-41 tooth aluminum rear sprocket to fit most pit bikes and minis including Pitster SSR RCM SDG Thumpstar Motovert Xtreme OGM and most others. Standard mount for the pit bike wheels on the market today. CNC cut from 6061 aluminum alloy. Available in red only while supplies last. Bolt holes measure 92mm across, center to center.