The Stealth will outlast your all aluminium sprocket by 300% and undercut the weight of your steel sprocket by 50%. How? Supersprox makes the Stealth using a unique, two piece design that combines a 7075 T6 aluminium alloy inner hub and an electro-less nickel coated, carbon steel outer ring to bring out the best of both materials. That means you get more strength and less weight. You're getting your cake and you're going to eat it too. The cherry Supersprox puts on top is that the Stealth bolts to your stock hub, looks great, and comes designed to work perfectly with your motorcycle or ATV. What's in the box 1 x Supersprox Sprocket.