Bear in mind at at 170 pounds and 5'3" you are doing 5 hour century ride's on a regular basis, right? Imagine what kind of speed you will have when you get 30 pounds off. Use an app like lose it or other calories in app, and don't count calories out with them (horribly inaccurate). Decide what you want to achieve this year to improve performance next year. And if you want motivation to cut weight vs fuel endurance, start riding big hills. But mostly, take notice of actual calories in. The math is off when you are not losing weight, it is pretty simple.