I have to agree, if you look into this it takes quite a bit to gain weight by adding muscle. I have lost roughly 50lbs. which took just over a year by controlling food intake and exercising. I can tell you that if I increase weight lifting I can see a difference but it does not show up on the scale. A healthy weight loss e.g. one that has a chance of being maintained would be about 1 - 2 lbs. per week through changes in eating habits and exercise. With the weight loss you will see a vast improvement in your cycling especially going up hills and your breathing will improve while riding too. Glad your riding so much stick with it.