Hard to know equivalent energy expenditure of what you are mapping out and how it compares to road cycling..when we are not certain about how many hours of cycling and degree of intensity.

But 50 lbs. sounds significant enough that you still need to adjust your food intake --decrease/eliminate types of unhealthy foods, limit size portions for good stuff, etc.

Unless you plan to lose 50 lbs. by cycling across the U.S. and eat same amount of food now.

The rule of thumb is to burn more than what you eat on a daily basis or similar.

To eat meals and feel 80% full.

YOu probably know how you ramped up to 50 additional lbs. from desired weight..