Originally Posted by
fritz1255
2) I know very little about professional bikes like that. What are they made of, what size tires do they use, and how much does a typical one weigh?
All the bikes you see during the Tour de France have a carbon fiber frame.
The tires they ride on are typically 700c tubulars. Probably 20 or 21 mm wide.
All those bikes weigh just a few ounces over the UCI minimum of 15 lbs.