Puncheur Sportive

riding toy bikes in the sun and drinking beer isnt the best form of training....
This is probably why I suffered a bit today. Route wasn't too hilly, apart from those up and down bits around Ardingly Reservoir, I was just not fit enough. First 33 miles were good, kept up with a few groups, taking turns. Hunger knocks started after 50 miles and had to eat loads. I didn't get to the top of Ditchling Beacon. I got a third of the way up and started to get cramp. Did the 68 mile in about 4:20.

I'm wondering if there's a connection between riding fixed and getting cramp on my road bike. Maybe I leave the road bike in too high a gear because it's similar to my fixed, where I should be using the bottom gears more.