For such a small doo dad this is incredibly well made and effective. For anyone questioning the need for a chainguide I'd suggest that they race a bit of cyclocross before deciding against one!
They are super fast and same inner drive as pro line. Running 30mm Conti GP5000 on them and they are sublime. Can’t wait to run some thunder burts on them come Traka. Epic wheelset and great upgrade to my MOG.