Up here in Minnesnowda I used chains some about 45 years ago=never liked them much generally, but for unpaved rural roads OK. Studs came in and I studded plenty of tires at the tire shop-liked them better, but soon outlawed as they certainly did eat up the highways. The discussion of Calif/I80 reminds of riding motorcycle in summer of 2003 and into the elevations where chains had been used-the huge wear on I80 made riding a real challenge=huge and deep(inches)and the wear into the stone aggregate was slippery. We got off as soon as possible. Dan Mpls. Mn.