Day 15 - Hotel breakfast then went to bike shop to purchase a new tyre for Ben's bike - down to the fabric so could have proved disastrous. Set off in drizzle to Koblenz at 10 am. Went to Deutsches Eck (where the River Mosel joins the Rhine). Further into this stage it proved to be challenging as we rode into heavy weather from Koblenz onwards. We needed to take shelter under bridges and trees as waves of torrential downpours came through. Stopped at Ramagen bridge famous for WW2 incident. Curtailed journeys end 5 miles short to book into hotel at Bonn Mehlem to dry out after 51 miles .