I'd better keep my mouth shut here. Other than to say :-
Its a very individual thing.
Ask you Doctor about Basal Metabolic Rate. Your Doc should tell you a sensible calorific intake.
Its to do with Body Surface Area and your age.
Start by only consuming the BMR your Doc tells you.
For athletes and cyclists in particular, keep doing your sport and reduce your calorific intake a little at a time ( about 100 kcals ) each week.
Keep the intake 60% carbs, 30% protein and 10% fats.
The reason for this is you don't want to go on a 'crash diet' while riding regularly. That will confuse your system and you will tire sooner. You may even suffer muscle depletion.
As you cut back each week, check your fat %, not your weight. 0.5% per week is what you should be aiming at, but this won't be until you have been in the program for about a month.
After about two months, you will need to visit your tailor.
I shalln't wish you 'good luck' because this doesn't rely on luck, it's 'sure-fire'.