I've had Metzelers on the R65 since '87 or '88, and they are a good tire, but don't feel quite right in wet conditions, but with living in Phoenix that's not much of a problem. The tires need to warm up before you ask too much of them, as I ride all year long, temps in the 30's F. will give you a real 'slick' tire for a couple of miles. Average mileage for the Lasertec's are about 8-9,000 miles for a rear and 12-13,000 miles for a front. At least that has been my experience.