Losing weight at 60 is ten times harder than at 50.
I'd recommend looking at a low carb diet with higher amounts of protein and fat but with an overall lower caloric content than your basel mataboloic rate. If you keep your total carb intake to 50 grams max on days you do not ride and to 100 grams on days you ride an hour or more, you will lose weight. Fat and protein are more satiating. As we get older our insulin sensitivity goes to hell. Anyway, I am sure many will disagree with me.