What time of day do you ride?
I find if I cycle first thing, whilst my liver is doing its dumping thing, I do not need to eat and my blood sugars stay level - I assume this is because the liver dump is balancing the blood sugar drop due to cycling.
If I cycle any other time of the day, I would go low without outside assistance. As I have a pump, I make sure I have no bolus on board (not eaten for 3 hours prior) and suspend my basal for the hour before I ride.