Traditionally, motorcycle tires used either old school bias ply design, or newer radial arrangements which allowed the sidewall and tread section to operate independently of each other. Though some motorcycles had radial and bias-ply tires at either end, the twain never met in the same rubber hoop — until now.
Michelin has unveiled a new "Frankentire" that combines bias and radial ply designs, which promise the stability of a bias ply design along with the handling and comfort of a radial setup. The tire uses a "2AT" (dual angle technology) concept.
Michelin explains the tire in more detail here.