While all road pedals function similarly, they all have different cleats, so always make sure the drillings in your shoes are compatible with the pedal system you intend to use. Due to the wider cleats and incompatibility with the recessed cleat drillings seen on mountain bike shoes, road pedals must be used with road shoes.Most road pedals use a 3 bolt cleat system which is what road shoes will come with.Speedplay pedals require a 4 bolt cleat system, requiring the use of an adapter plate to make them compatible with all road shoes. Look, who still manufactures high-performance pedals today and uses carbon pedal bodies to make some of the lightest pedals on the market, created the first clipless pedals.