Sources: bmxmuseum.com, Freestyle BMX UK, www.vintagebmx.com, ...
If you want to add any info, please contact buissonrouge@23mag.com.
VDC stands for Voris Dixon Company.

www.vintagebmx.com: VDC was started by Voris Dixon in Santa Ana, CA. Voris originally got started in BMX selling custom made 17 tooth sprockets for Bendix hubs at his bike shop in Anaheim, CA (called Bike Land). VDC manufactured framesets and parts for several companies (National Pro, Traker, Vector, Hutch, Powerlite and Robinson to name a few) in addition to their own line which included the 20” mini (Chimp), 20” pro (Changa), and the 24” (Gorila). The VDC frames featured a unique dual head tube piercing design and used a 5" head tube with a road bike sized headset. Although the Changa is the most well know product of VDC, the company actually made most of its’ revenue as an outsource shop for other companies. VDC made a large variety of BMX and cruiser components, including sealed bottom brackets, alloy bars, alloy seat posts, forks and pedal cage extension kits.

Voris Dixon, bmxmuseum.com, 2006: The only thing I have left is a March 1983 issue of "Super BMX Magazine" where they did a product test on the Changa. Also one business card and one fluted seat post. The test was done by Woody Itson. I used to make his handlebars. Also made some Hutch Handlebars along with Robinson, Powerlite, and ProNeck. Think I was the first to make the Vector aluminum bars made of 2024 Aluminum. If I remember the serial Numbers were 7 numbers. The first three were the number of frame that month and the next two were the month and the next two were the year. We made the "Changa" Long and Regular. "Chimp" a mini. "Gorilla" 24" wheel. Made Gorilla Bars (handlebars). Made laid back seat posts and other things I'm sure. Made lots of stuff for others. Made the whole ProNeck line of frames, forks, handlebars and seatposts. I did come up with the dual pierce design. The one draw back was that it took a tenspeed type headset which was not accepted in those days as being usuable for BMX.
1983 1983 VDC "Chimp" mini. VDC Chimp 1983
1985 1985 VDC "Changa" freestyle. VDC Changa 1985