For a long 1/8' x 1/2" chain I like using 2- KMC Z510HX Premium BMX chains with their thicker side plates and stretch proof construction. http://kmcchain.us/chain/z510hx/ If you have never cut a chain before just ask. There are people here that can walk you through it. There should be videos online too. My local bike shop will do it for free if I buy the chains from them.