Postscript to my Wednesday ride above: On that ride, I rolled over 70,000 miles since I started keeping decent mileage records in January of 1989. I did a lot of riding in 1980-1988, including several seasons of racing, but didn't keep good records, so I can't say with certainty how many miles were rolled. And it would be a guess anyway, as I didn't have a useful odometer on any of my bikes back then.