The Onyx is a super tough sprocket which uses cold-forging technology to help radically increase strength over a traditional CNC machined sprocket, whilst maintaining a more affordable price tag. This sprocket incorporates a double-sided design, allowing you to change up the look of your bike without having to spend a dime.   Material6061-T6 alloy, full cold-forged Size25t or 26t Thickness6.35mm Axlebore23.8mm Featurestwo sided design, pick the side you like the most or flip it to give your bike a new look / cold forged, stronger than CNC machined sprockets / runs on 24mm spindle/ supplied with adapters for 19mm & 22mm / sinked adapter for better chain alignment Weight25t – 144g (5.10oz/ 0.32lbs)