Moving this thread from the 308 discussion on XWX, and the modernization of current production XWX tires and how that compares to modern BF Goodrich tires (which are not rated for high speed). Question: when one says "keep in mind that today's technology and tire quality is 30-40 years better than what came on the car originally." are we suggesting that the XWX is still made with 30-40 year old technology? That is, has anyone asked Michelin if they are using the same old compounds and assembly methods, or are they (I would think so) using more modern compounds and processes? And that presupposes that the BFG is not >20+ years old itself. ?? I'm in need of tires for both a 4-cam and Queen Mother, and am at a loss: XWX to look good but "firm" riding, versus the BFG which has a low speed rating. Curious if anyone has compared the ride of the XWX to the BF Goodrich on a vintage through C/4 model? Aloha.