If you check the bottom of your cycling shoe and it has 2 holes, then this is considered an SPD cleat system. The 2-hole system can be used for all types of riding, including road cycling, mountain biking, touring, commuting and indoor cycling. When paired with shoes that have a recessed cleat design, these cleats allow for easier walking and are quickly becoming the most common cleats in cycling. Indoor riders, please note that this 2 hole cleat system is compatible with pedals like those found on Echelon bikes but NOT on those found on Peloton bikes.