The factory cross bars on my 2017 CRV are fixed; I don't know if that's also the case for the 2015 model. I discovered the cross bars were not the same spacing as the mount points for my Yakima rooftop box, so I drilled some new holes in the box to make it work.
No CRV here, but I would not recommend a roof rack. Only a matter of time before you do something stupid with it. 1up hitch mount is what I have and gets my vote. ______________________________________ http://instagram.com/protrusiotom#