The all new Praxis Zayante Carbon X M30 road crank is the ultimate marriage of lightness, stiffness and versatility. Up your game with its rigid carbon arms and stout 30mm spindle. And enjoy the right gearing setup for every ride with its new X-Spider for double rings or direct-mount interface for singles.Weighing a feathery 615 grams (172.5 50/34) the Zayante Carbon M30 crank has come to play and is ready to disrupt the peloton.Key Features:4 Bolt Pattern.160/104 BCD.48/32, 50/34, 52/36, or 53/39 chain ring choice.M30 Aluminium Spindle.Requires Praxis M30 BB : BSA, BB86, BB30/PF30 (30mm Drive/28mm NonDrive).Works with Shimano10/11, Campy 10/11, SRAM 10/11.Approximate weight 610g duo ring.