I survived Rad am Ring

Although the last lap I didn't feel really alive anymore.
Only hit a maximumspeed of 90,3

On a german forum I saw a lot complaining of lower maximum speeds, and suggestions there was a little headwind there.
I finished in 5h13, over 150km with 3000 meters of ascension that's not too bad, but I was hoping to do it in less than 5 hours. But my laptimes went up too much, especially in the last 2 laps:
45:40
48:03
50:37 (with 40 second pitstop for taking water)
52:04
56:41 (again with 40 second pitstop for taking water and a few bars)
1:00:45
Although i was a bit behind scedule after 4 laps, the drop in laptime up until then was OK, but in the last two laps the kilometers and the ascension began to wear me really down. The last lap and a half was a bit too much, especially in the last one I was literally crawling in the last meters of Höhe Acht, hitting a lowest speed of 6 km/h.