I can only average about 11.5 mph when riding my bike no matter how hard I try. I have a touring frame with mountain bike components, it weighs 18 pounds and I weigh 115 and am 52 years old. Going up a hill is usually at around 7 or 8 mph and going down a hill (I'm scared on down hills) is maximum 20 mph. I doing "spinning" on my trainer at home twice a week (just started about 3 or 4 weeks ago). Before on the trainer I was just concentrating on standing climbs to build up my power so I would be better at hills. I do strength training 3 times a week and walk 3 -4 miles 5 days a week. Is there anything that will help me get my average mph up? I really feel like a whimp when I hear everyone else saying their average is 17 or more What's wrong with me?