Originally Posted by
JunkYardBike
I have to say, though, I've recently experienced the cramping even on bikes I've ridden for distances in the past without the same problem.
Hey, I think I got it now!
If you weren't cramping on previous 60's and your other 'junkers' and it's not for the lack of training and your hydration/nutrition looks OK to me, then it has to be your riding buddy!
Just have him slow up a bit or drop you behind the horizon. Problem solved.