By installing a pair of PD-M540 SPD pedals on your bicycle, you gain a new ally that will help you ride more efficiently and reach the top with less effort. The SPD technology is applied in combination with mountain biking shoes and the SM-SH51 cleats included in the package. Once the cleats are securely attached to the pedal, you function as one with your bike and utilize the power of your leg even to pull the pedal upwards. They provide greater security on rough descents and trails where your foot could slip off a flat pedal. Additionally, you can adjust the tension of the release spring according to your preferences. This way, you can control the force you want to exert when rotating your heel outward to release the cleat from the pedal.