The gear you should use on your bike depends on the terrain and your desired effort level. Here are some tips from the search results:

• Find the right gear: The key to using your bicycle gears efficiently is to start by finding the right gear. This means you can keep a steady rate of pedaling, or cadence, without feeling like you are pushing too hard or too gently through the pedals.

• Low gear for climbing: When climbing, you’d want to put your bike in a lower gear. This will allow you to pedal easier to get over the hill.

• High gear for descending: When descending, you’d want to put your bike in a higher gear. This will allow you to accelerate while traveling downhill.

• Shift gears before changing speed or terrain: As a general rule, you should try to shift gears just before youre about to change speed, or when changing the terrain or gradient that youre riding on.

• Dont worry too much about being in the correct gear: Beginner riders should try not to worry too much about always being in the correct gear. With time, it will become second nature.

• Store your bike in the highest gear: When not in use, store your bike with the gears set to the highest gear (the chain on the smallest cog), so that the spring in the derailleur is under the least pressure, and the cable is also under the last tension. So the cable will stretch less and the gears will stay in adjustment longer.

Remember that the gear you should use also depends on the type of bike you have and the number of gears it has. If youre unsure, its always a good idea to consult the manual or a professional.