i need to know wat the spikey thingy that holds the cain and goes around when u move the pedal! i need this for hw! im only 11 and i dont know it!!! 6th grade hw plz!!! help me!!!
thanx so much for those who help!
FOR JACKORY, I NEED A SPECIFIC NAME FOR IT!! I KNOE ITS GEARS!! I FOUND THAT ITS A CRANKSET BUT NOT SURE SO SHUT UP!