Fitness Bike – A flat bar road bike, also called a fitness bike, is a hybrid bike optimized for road usage or a road bike with a flat handlebar in place of a drop bar.
Frame construction and geometry borrow significantly from conventional road design. The frame is constructed to a light or middleweight standard with a shape that promotes an aggressive, aerodynamic posture suited to riding at higher speeds. There is no conventional suspension for either wheel, though the front fork may use carbon or steel to quell vibration. Wheel size is almost universally 700c with a width of 28mm to 32mm, somewhat wider than the 23mm to 25mm road bike standard.