Using these Crankbrothers Stamp 7 pedals is easy. Just attach them to your bike. Make sure to adjust the 10 pins on each side according to your preference for better grip. For the best experience, use the large size if your US shoe size is between 10 - 15 or EU size is 43 - 49, and the small size for US 5 - 10 or EU 37 - 43. When riding, the concave platform will keep your feet secure. As for maintenance, take advantage of the grease port. Regularly add grease to keep the pedals working smoothly. There's no maximum rider weight limit, but always ride safely. The pedals come with a 5 - year warranty, so if you have any issues, you can get them resolved.