The CT15 is ideal for mountain bikers, and commuters alike as it offers the best of both worlds. A broad stable base on one side for regular shoes, and an SPD compatible system on the other. The retention system is adjustable too, which is handy as you become more familiar with the system you tend to want to increase the tension. Performance is further aided by the diecast aluminum body, sealed bearings and machine Chromoly axle. Single sided flat pedal and SPD system