These days, as much carbon fiber as possible.
Yes, the bikes on the tour de France have brakes on each wheel.
No. They use regular road bikes and TT(time trial) bikes.
They're the same size as regular drop bar road bikes.
Drop bar road racing bikes.
Multi-geared, drop bar road bikes and TT (time trial) bikes.
Camagnolo don't make bikes, they make bike parts, like gears and brakes. Many Tour de France winners have won on Campagnolo-equipped bikes. There have been thirty winners on Campagnolo-equipped bikes. The most recent was in 2006, Oscar Pereiro won.
Tour bikes are the lightest, most efficient, and arguably the most expensive bikes made. They are manufactured by hand with the design created by thousands of man hours on computers by engineers, The components used are the best money can buy.
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"Tour de" basically means "tour of". So tour de France = tour of France.
Mostly road bikes, but the race also contain one Time Trial section in which specific TT bikes are ridden.
I think one team this year Caisee D'Epargne the Spanish team Rode Pinarello Prince Bikes
Le tour de France