Gears confuse almost every beginner cyclist. You know they exist. You know they're important. You're probably not using them correctly. And when you do use them, your bike makes a grinding noise that sounds expensive and alarming.
Good news: gears are actually very simple. Once you understand the basic principle — which takes about three minutes — you'll never feel confused about them again.
The only thing you really need to know
Here it is: easy gears make pedalling easier; hard gears make pedalling harder. That's the whole thing. Everything else is detail.
An easy gear means your legs spin fast but with little resistance — like cycling on a stationary bike at low resistance. A hard gear means your legs turn slowly but push against more resistance — like trying to cycle uphill without changing down.
You want easy gears going uphill (so you can keep turning the pedals without straining). You want harder gears on flat roads and downhills (so you're not spinning your legs pointlessly fast).
Shift into an easier gear before you need it. If you wait until you're already struggling on a hill, it's too late — you'll feel a horrible grinding resistance. The trick is to anticipate and shift early, while you still have momentum.
How the shifters work
Most bikes have shifters on the handlebars — either levers you push sideways, or triggers you press with your thumb and index finger. On a basic road or hybrid bike, you'll typically have one shifter on the left and one on the right.
In simple terms: one side usually controls the front gears (the big rings next to the pedals) and the other controls the rear gears (the cluster of rings on the back wheel). For most beginners on hybrid or city bikes, you'll mainly use the rear shifter. Don't worry too much about the front one to start.
Some bikes — particularly single-speed bikes and many e-bikes — have no gears at all, or automatic gears. If that's you, skip ahead to the section on cadence.
What's cadence and why does it matter?
Cadence is just the word for how quickly your legs are turning the pedals. A comfortable cadence for most beginner cyclists is somewhere around 70–90 revolutions per minute — but don't worry about measuring this. You can feel it.
If your legs are spinning very fast and feel like they're doing nothing (like pedalling downhill), you need a harder gear. If your legs are turning very slowly and you're grinding heavily (like the worst bit of a steep hill), you need an easier gear. The sweet spot feels smooth, rhythmic, and sustainable.
Why does my bike make a clicking noise?
A clicking noise when you're NOT changing gears usually means the derailleur — the mechanism that moves the chain between gears — isn't quite aligned with the gear you're in. This is very common and usually a minor cable tension issue.
A scraping or grinding noise suggests the chain is in a "cross-chain" position — for example, the biggest front ring and the biggest rear ring at the same time, or the smallest front with the smallest rear. These positions put the chain at an extreme angle and stress the drivetrain. Avoid them.
A grinding sound while shifting is usually just the chain moving between gears — it sounds alarming but is normal if it stops immediately once you've shifted. If the grinding continues, your chain might need lubricating or your bike might need a cable adjustment at a bike shop.
Practical tips for beginners
- Shift one gear at a time. Don't try to jump multiple gears at once — it causes the chain to skip or fall off.
- Shift while pedalling (not while stopped, and not while pedalling hard). Light, consistent pressure on the pedals while shifting is ideal.
- Look ahead. If you can see a hill coming, shift down before you reach it, while you still have speed.
- Don't be afraid of easy gears. Many beginners stay in gears that are too hard because easier gears feel "slow". Spinning easily uphill is much better for your body than grinding painfully.
What gear should I be in on flat roads?
There's no fixed answer — it depends on the bike, the conditions, and your fitness. But a rough starting point: on a typical hybrid bike with 21 gears, you'll spend most of your flat riding in the middle range of rear gears with the front in the middle ring. Adjust from there based on feel.
As you ride more, your gear choices will become instinctive. You'll feel the terrain changing and shift without thinking about it. That moment — when gears become automatic — is genuinely lovely. It usually happens faster than you'd expect.
What about one-speed bikes?
Single-speed bikes are perfectly valid for flat or gentle terrain. You simply can't change gear, so you manage hills by pedalling harder or slowing down. Many commuters love them because there's nothing to go wrong. They're not beginner mistakes — they're a genuine choice. Just know that if your area is hilly, you'll have a harder time.