Originally Posted by Jarrett2

I don't think that's accurate. If it were true, there would be no bonking. People would just do high intensity exercise for a long enough duration to get passed burning glycogen and into fat burning. So riding longer and harder would be better for weight loss. But we've shown that doesn't work.

Instead, what we find is you ride hard and your body burns off all of its glycogen in an attempt to maintain the energy level. Either you replenish the glycogen as you go or you bonk once you've emptied your glycogen stores. Piling on more and more glycogen via carbs tells your body to continue storing fat as glycogen because it is the active fuel preference. So you feel as if you need copious amounts of carbs to keep the cycle going, which you do.

Alternatively, if you ride slow and easy and keep your heart rate down, your body opts to burn fat before diving into the glycogen stores. At that point, you can start to lower your carb intake in your diet while slow transitioning to fat as the primary fuel preference and begin losing weight in the process.

Which basically breaks out to:
Rider harder/faster, eat tons of carbs, don't lose weight
Ride slower/easier, eat fewer carbs, lose weight