I am not sure how many calories you eat in a day but I know that cycling burns a lot of calories. If you do not eat enough your body will go into starvation mode and not shed any fat. You may try adding 200 calories extra a day to your diet and see if the weight starts to come off.

I am 5'2" and I weigh 210. I know that in order for me to lose weight I need to eat roughly 1800 calories a day because of my cycling.

Also, you may try eating 5-6 small meals a day.

I am no expert, this is just my 2 cents.