Join Date: Jun 2004
Bikes: 2006 custom Walt Works roadie, 2003 Fuji Finest (road), 2002 Giant Iguana (mtb), 1986 BMW K75 (motor)
sorry, not sure. No one should really bonk on such a short ride. I'll assume you were out for 30 minutes? Unless you were treating your body badly for the previous day, like drinking a lot of alcohol and not consuming anything else, then your body should've had what it needed.
So, I'm gonna guess it was a psychological bonk and it took your body with it.
I re-read your post and you said that you "...ate well Saturday evening and Sunday morning. I had plenty of water and actually emptied my big 24oz bottle inside the first two miles."
If you didn't have enough electrolytes -- sodium and potassium specifically -- AND you drank that much water, I'm gonna guess you washed the salts out of your body. That'll mess you up.
I start every ride with a banana, OJ, and/or V8.
Keep it up!