ACS Z-Wheels were a popular type of wheel for the professionals. All colors with matching hubs. There was a rumor that if you placed them in the Freezer they would straighten out. From the experiences of my friends this didn't really work. But they did make nice decorations to the pile of old broken bike parts in my garage. Unfortunately they faded away quickly. Brakes wouldn't work well with them.
RC Alderman - Z rims.