Cycle round Rhineland-Pfalz and effectively climb up to Tibet

I have noticed recently there is a fashion amongst road mean and women to climb the height of Mont Ventoux in a day. Basically one chooses a local hill and climbs it enough times until one has climbed the same height as the famous mountain in SE France. Why stop at Mont Ventoux? Why not head for the Himalayas? The south western German province of Rhineland-Palatinate has combined a number of cycle routes running around its borders and set up a 1040km long cycle route that climbs 8000m in total. It is a circular route.
We thought we'd give it a try. We will start in Hordt near Germersheim where we can pick up hire e-bikes. (We think we could do with some assistance at our time of life.) We will then follow the Rhine down to the French border to cycle up across the Palatinate Forest, along the border with the Saarland and then the border with Luxembourg. The route then crosses over the Eifel hills along former railway lines before dropping to the Rhine to cross it and climb into the Westerwald. The route then swings south across the Lahn to reach the Rhine at St Goar and St Goarshausen. Then its a case following the river back down to Germersheim.
There is all the information you need under http://www.radwanderland.de. The route is called Rheinland-Pfalz-Radroute in German.