 This is why most documentation also contains the UIAA free-climbing rating of the crux of the route, as well as the aid-climbing rating (in the original aid-climbing grading system) and the then resulting free climbing rate.The routes themselves are, however, usually only marked with the overall grade (and/or sometimes the French equivalent) at the bottom.The grades go from 1 to 7, and a good parallel can be established with the French rating (1 is F in the French rating, 2 is PD and so on, 7 being ABO).