I love my 2018 Ultegra Caadx. I have changed out the wheels and various other parts in my attempt to get it sub 20 lbs. but with 38 mm (measuring an actual 40 mm) GravelKings I cant seem to get there. It is light enough and Cannondale continues to do amazing things with aluminum making the frame extremely comfortable. A slacker head tube makes it work on gravel as well as cx. Enjoy!