Originally posted this back in '07:
Heres the text of the sidebar in the December '80 BMXA which asks the same question...
"PRO-NECK AND TUF-NECK: AN IDENTITY CONFLICT
Two identical stems: the Pro-Neck and the Tuf-Neck Pro-Model. They both even use animals with studded collars in their logos. But they are manufactured by totally different companies.
Pretty confusing, hey?
This sidebar is a careful, hopefully objective, short history of how this came to be. Oversimplified, of course.
First there was Bakton Enterprises, the original designer and manufacturer of the original Tuf-Neck stem.
Then came a company called Superbyke which, in addition to its own products, purchased Tuf-Neck stems from Bakton Enterprises and marketed and distributed them.
But SUperbyke's management was not exactly clickin', and the company went down the tubes.
Whereupon one of the investors in Superbyke formed a new company and made arrangements with Bakton to purchase, market, and distribute Tuf-Neck stems. This new company was called Tuf-Neck, Inc.
Are you with us so far? This is where the plot thickens.
All this was cool until the defunct Superbyke company was purchased.
At this point the new owner began marketing and distributing an identical Tuf-Neck stem - not manufactured by Bakton - along with their other products.
This, of course, created a multitude of identity problems what with two companies advertising and distributing identical stems with identical names but manufactured by different companies.
So Tuf-Neck, Inc and Bakton Enterprises changed the design of their stem by radiusing the corners, and changed the name of the stem to Pro-Neck.
At this point the situation was thus: The Pro-Neck was distributed by Tuf-Neck, Inc., and the Tuf-Neck was distributed by Superbyke. Which wouldn't do at all. So Tuf-Neck, Inc. changed its name to Pro-Neck, Inc. and the identity conflict eased somewhat.
Until Superbyke came out with a newer version of the Tuf-Neck - with radiused corners, called the Pro-model Tuf-Neck.
Ah...what terrible tangled webs we weave. - Bob Osborn"