I sorry, but I think it's just a ripoff. When you can buy locking hubs for later models for $50-$100 a set, and they are almost identical in design and function to the old ones, there is something wrong. If the old ones were some special design maybe I could see it, but they are so simple. I think that the people at Mile Marker make a good product, but they know they are the only maker of these old type hubs, and they are going to stick it to you.