No, they don’t. Float is a good thing. It allows your feet and knees to work outside of a set plane of movement. As such higher amounts of float can lower the stress put through the knee and ankle joint. Some riders feel more engaged in the pedals with zero float cleats, but these riders are often track sprinters or hill climbers. For most riders a range of between 2-9 degrees of float offers a good range. Speedplay offer the biggest adjustment range with up to 15 degrees of float.