Are flat Centuries easier than hilly Centuries?
Actually, flat Centuries are NOT easier than hilly Centuries. On a flat Century you’ll be seated in a static position for the entire ride, and performing the same pedal motion for countless hours. This puts repetitive strain on leg muscles; your wrists get sore; your back stiffens; and your bum will hurt from sitting the whole time. You’re also subject to crosswinds because flat areas tend to have more wind.