The TNT Derringer Hubset is a flip flop style BMX hubset. This is able to work with 13 tooth or larger freewheels. Great for BMX and many other types of bikes. The set includes both front and rear hub both using sealed bearings and being made from aircraft quality aluminum. Both the front and rear hub use 3/8" chromoly axles and have looking bearing collars. Drilled for 36 spoke wheels and weight comes in at just 16 oz. for the set. The Derringer hubset also comes in many different colors.