When even bike magazines can’t get the difference between peddle and pedal right, you know it’s time for another super-useful and majestically executed MS Paint usage cartoon.
The two words are commonly mixed up. To peddle (verb) means to sell something and to pedal (verb) means to work a device, like a bicycle, by pushing on the pedals (noun). If you’re not writing about riding a bicycle, chances are you want to use the verb “to peddle.”
And if you are referring to the person doing the action, chances are you’re talking about a “peddler” (someone who is selling something) versus a “pedaler” (someone who is pedaling); the second usage is fairly rare.