This is an old thread... but thought I'd weigh-in on the PSLR-1's. I have a set of 2014 PSLR-1's on my 2012 Giant Defy Advanced 2. They are great wheels, very light and stiff yet compliant (go figure...) especially when running tubeless. I haven't had a flat in over 1200 miles. I just bought a Propel Advanced SL with Zipp 404's (tubes) and flatted within 60 miles...