Okay, so:
Front wheel is 14 inches from axel to frame, and 2 inches clearance at the top of the frame. Or, 356mm and 50mm.
Back wheel is 15 inches and 2.25 inches. Or, 381 and 57.
Per an email discussion with Schwalbe: the tire is either:
47-622 (700x45c / 28x1.75) - The rep thinks there...