To install your pedals you will need either an allen wrench or a crescent wrench depending your style of pedal that comes with your bike. Your pedals are either marked with a L or R indicating which crank arm they need to be installed on. It’s very important that you grease the threads of your pedals before installing them. This will ensure that the pedals are easy to remove in the future. Start by lining up the threads and hand tightening the pedal into the crank arm to make sure that you are lining up the threads correctly. Once you’ve got the pedal started, you can then use your allen wrench or crescent wrench to finish the job.