Season Druid Guard Sprocket. Clean-looking and strong. Season have brought out their combined sprocket and guard. Ideal for protecting the sprocket when grinding. CNC'd from 7075 alloy to get a great strength to weight ratio, this is a great value sprocket with built in guard. Bore size is 23.5mm and sprockets come with spacers to allow them to work on 19mm and 22mm axles.