Was this a fueling issue?

[rubysoho]

I don't know what sustained energy is. But two water bottles over 4 hours is not enough.

Temps were in the mid-60s yesterday, but it felt noticeably cooler as the sun started to get lower. Did you add any layers during the last 60-90 minutes of your ride?

No, and I definitely felt like I needed another layer on my core (and my legs even though I had on long/winter riding tights).

[marni]

when i start bottoming out it is usually because I haven't eaten enough before the ride or during. I also tend to cramp more easily and charlie horse whenever I end up short on potassium so I am careful to eat a banana before I ride, and possibly a second one during the ride. Around here I tend to go through more water when it is coo and dry, because I know I don't notice the sweat and don't get thirsty. I carry two bottles, one with FRS (my version of electrolytes) and one with plain water. In case I have to refill, I carry extra FRS tubes and start with the FRS bottle.

Sounds to me like a combination of not enough to eat or drink and not enough layering combined with an increased mileage which may or may not have been a big bite to chew.

marni

[bluebug32]

I second what has already been said. The first warm days can catch us off-guard. On longer rides like this it's always better to over prepare with plenty of food and some Enduralytes or other electrolytes at the ready. And keep drinking lots of water too.