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A road bike is faster on the road than a mountain bike. That's all
a 56cm road bike is a road bike that the frame is 56 Cm. if didn't full fill you answer I'm sorry:
It's a drop bar road bike for most of the race, and a time-trial road bike for the individual pursuit stage.
my bike (cycle)
a triathlon bike is like a road bike, thinner then mountain bike tires..