Locks... I've spend a lot of time getting my whole family using the same key with all our Yakima systems. We probably have 40 cores between us all. Do you have the removable SKS lock cores? Old ones have a 3-digit key code stamped on the outside (not good for security!). New lock cores must be stamped on the inside... don't remember. With that code, you can buy new keys. Or just buy a new set of SKS lock cores.