Here is a link straight from the Avon North America site. Looks like they are making the trike tire in 2 sizes now.
The 130/70R18 for $174 and a MT90B16 for about $138
http://www.avonmoto.com/products/cru...om/cobra-trike
The 130/70R18 for $174 and a MT90B16 for about $138
http://www.avonmoto.com/products/cru...om/cobra-trike