Radio Destro CranksAfter a year of development Radio finally completed the Destro Cranks, their quest to develop some of the toughest cranks on the market paid off after machine testing and riding testing proved them to be insanely strong. Incredible strength without excessive weight, the Destro Cranks come with a 22mm sealed Mid bottom bracket so you can geet them bolted on and get riding as soon as possible. Seamless 4130 CrMo tubing, liquid post heat treated crank