Springer America, based in Raleigh, NC, sells Springers via exclusive distributor relationships. See http://SpringerAmerica.com for where to buy a Springer. The Springer Dog Exerciser is the bike attachment that allows dogs to run safely beside their owners.  Springer’s low-mounted, heavy-duty steel spring absorbs up to 90% of the force of a dog’s unexpected tugs, allowing bike riders to keep their balance, while protecting them from traffic, pedals, and wheels.  Enjoyed by 600,000+ dog-loving bicyclists around the world since 1988, the Springer is quick and easy to install.