I am using a 16x2 lcd display with 16 pins. I hooked it up to the arduino (I am using an arduino uno for now but my finished product will use an arduino mini pro). There are going to be four different displays and a button to switch through them.

Display 1

This display will show you how fast you are going(MPH or KPH). It will also show you what gear you are on (It will switch gears for you so your normal thing won't be accurate) and the wind speed and direction.

Display 2

This display will show you your trip information. How far you have gone and how long it took you. You will be able to reset the information by holding down the set button for three seconds.

Display 3

This display will show you the time and if the gear three setting is on or off. When the gear 3 setting is off, the bike won't switch you to gear 3 (front gears). You will be able to press the set button to toggle Gear_3 on or off. It will also show you the temperature (I couldn't use the degrease symbol so I had to substitute it with ^).

Display 4

This display show you the total distance you have traveled on the bike.