Abstract: A cyclometer computer display unit for providing an on-board computer to display real-time instructions to the cyclist. The computer has a central display mounted on a handlebar bracket. Sensors mounted to the front wheel detect the current wheel rotation velocity of the bicycle. Stored data in the computer including the wheel diameter, and gear ratios, and a maximum and minimum effective cadence range are used to calculate theoretical cadences (pedal rpms) for each gear for the cyclist. Certain theoretical cadences are displayed along with various gear ratios to coach the cyclist on which gears would place the cyclist in a cadence within the desired cadence range. Optional shifter position sensors, derailleur position sensors, or crankarm rotation sensors can be used to determine and display the actual cadence and current gear.