Put these on my F650GS yesterday. I was not so thrilled with the mileage I was getting on the rear with the Tourance and these Heidenau's are getting good reviews. Did not have time to go on a good ride to scrub them, but on the short ride home from the shop they did feel really kinda buzzy, definitely not as smooth a ride. Anyhoo, time will tell. Wonder if anyone else here has passed judgement on these.