Sorry, I don't think anyone will tell you that.

Check with your doctor, but the big risk here is hypoglycemia. When you're cycling for days in a row, you're burning up all that blood glucose. If you stop checking and your levels get too low, and if the efforts of cycling mask the early warning signs, you could be headed for some serious issues.

That said I'm sure any doc will tell you that exercise will significantly improve your condition. But you really should check your levels regularly if you're on tour.