That looks very like is the Raptobike Low Racer, which was a very fast and low bike. IIRC, the 2 wheel system (with suspension) could be fitted instead of the single rear wheel, giving great stability and no excuses for not riding in winter's ice and snow !
Raptobike also made a Mid-Racer which was nice too.
Sadly I think they went out of business, though their website looks active...