1500/day is insane and unsustainable for most men. how big are you and how small are you trying to get? do you want to protect muscle or just lose weight fast? how much are you riding? for reference, I'm 6' around 200 and my maintenance, without counting cycling, is 2500. I usually eat consume more like 3000. On big riding days I don't even count them.

I'm 6' and about 200 right now, and right I put in 15-35 a day, with a big day up to 50 every week. I accomplish this with commuting, lunch rides, and a fast group ride each week. I eat. A lot. When I train this much without eating a ton, especially carbs, I literally run myself into the ground. Last summer I got into a bad over-training situation that took weeks to shake.