Subrosa Barcelona sprockets help keep your chain protected and your bike looking mean in the streets! Available in both 25t and 28t sizes and comes in black, concrete grey, army green, and teal drip. Click HERE to view available sizes/colors. Designed with Subrosa pro Simone Barraco the Barcelona Guard is 8mm thick which allows for the sprocket to take hit after hit without bending or deforming. Specs: 7075-T6 8mm thick alloy. Compatible with the widest chains. 24mm bore hole. Includes 19mm & 22mm adaptors. Weight for 25t: 5.6 oz. The Subrosa Barcelona sprocket is hands down one of the strongest sprockets in BMX!