This question is probably really silly...do you have to have a special wrench to remove pedals? I really want to switch my pedals out today but I don't want to drive all the way to the bike shop if I don't have to. I was going to try using an adjustable wrench but I don't want to mess anything up. It's just little old me with no DH or other helper but I really want to change out these pedals all by myself!