I am in market for some new tires and have been considering these high TPI so called "open tubulars" from various companies. I read a bunch of threads tires and am still considering the whole balance between high TPI ride quality and tire durability so am wanting to make sure I understand the whole TPI thing. I read a recent thread on tire quality,and that helps alot. However, in looking at various tire options, I noticed that the high end for TPI on clincher tires (except those advertised as open tubulars) seems to be 130 or so (Vredestein Tricomps, Michelin Pro Race, e.g). But continental reports its TPI on GP4000 line as "3 Pile/totaling 330 TPI". Am I missing something or is this a marketing thing to make 110 TPI clinchers seem like 330 TPI tubulars by totaling up TPI for various layers of the tire? What does "3 Pile" mean?