I remember a few years ago hearing of an Italian who turned pro at 34 and then rode his first Tour de France.
Ludo Dierckxsens, who rode for Lampre in the 2002 Tour and now rides for Landbouwkrediet-Colnago, is 39 .... :eek: He turned pro at 29 after working most of his 20s in a factory painting cars. There's a great article about him in the May 2003 Procycling mag.
You're 15. Most of the young professionals in Europe are about 20-23. Lets say that there are 4 categories of road races where you are. Beginners start with Cat 4 and, depending on performance, move up a category each year. In 4/5 years you 'could' be at category 1/Elite level. If you can make an average of 20 mph over 2-3 hours then you'd be ready for a cat 4 race. Even so expect to suffer and get dropped in your first road race and if you can stay with the bunch then it'll be a bonus.
Join a good road racing club, meet other roadies, read lots like:
The Cyclist's Training Bible -- Joe Friel
Serious Cycling -- Edmund R. Burke
Lance Armstrong Performance Program
It's not about the bike -- Lance Armstong
Age is not an issue here. The main issues are:
a) train correctly (read the books) without overtraining.
b) eat right
c) rest lots
d) enjoy training yet stay committed
Look on the bright side! You've only been training a month and you can do 15 miles over two to two and a half hours ... that's excellent! I can remember doing 20 miles over hills for the first time when I was 15 and my legs couldn't carry my weight at the end. I collapsed when I got off the bike!
Oh and if you're going to push yourself hard you'll need to get a medical from a doctor who understands endurance sports.
Enjoy 😄