Just something to consider - don't look at the weight number on the scale. With biking, it's more about changes in dimensions. Ride enough and you will see your waist narrow, your thighs turn into muscle and firm up and maybe get larger, etc. Measure yourself at the start (waist, hips, thighs) and that's where you will see change. Your clothes will fit differently as well, eventually nothing will spill over your pant tops if you ride regularly and long enough, but the scale number may not move much.