Hey all...so i remember reading something on here about chain sizes and why the chain on a bike wasn't working properly...so my question is i have a Heavy Duty 26 x 2.125 set of wheels, rear cruiser break and the original '63 chain ring that i will be using. i have the original chain the 63 schwinn came with but i am unsure if the chain will work with the rear cruiser brake, and what size it is. any help on ID'ing the size of the chain that i have. and also if it will be the one i can use or should i get a new one thats a different size? thanks