Crossing the Black Forest; maybe.

[Andy in Germany]

Jumping up from 160km to 180km (plus some hills) is no big deal in itself (all other things being equal). Except you don't say how long the 160km took ..

5 hours? Or 15?? (elapsed, not moving, ideally)

I can't remember in detail, but it was about 10-11 I think. I was using this bike though:

Which is heavier than the one I'll be using on any epic Black-Forest-Crossing rides:

 

[Andy in Germany]

pictures are of course obligatory.

I will inflict them on you, don't worry. If you're really unlucky I might even make a video.