Almost every bike comes with gears, and for most riders that’s the right default. But a single-speed, with exactly one gear and none of the shifting machinery, has a devoted following for good reasons, and on the right terrain it’s a genuine pleasure. Which one is right for you depends on where you ride and how much simplicity is worth to you.
What a single-speed actually is
A single-speed bike has one chainring at the front and one cog at the back, joined by a chain, and nothing else: no derailleurs, no shifters, no cables for either. You get one gear ratio, chosen once, and you live with it everywhere. Most single-speeds have a freewheel, so you can coast without pedalling, exactly like a normal bike with the shifters removed. A fixed-gear bike is the stricter cousin, covered lower down.
The two, side by side
Single-speed
Simple, cheap, flat-friendly- Almost nothing to maintain, adjust, or break
- Lighter and cheaper than the geared equivalent
- A clean, quiet, direct ride
- Nothing to think about while you ride
- Hills and headwinds are simply harder
- You spin out and can't pedal usefully at speed downhill
Geared
Handles anything- Keep a comfortable cadence up hills and into wind
- Carry loads and cover distance without grinding
- The right gear for every gradient
- More parts to maintain and adjust
- Heavier, pricier, and a little more to learn
The case for one gear
The appeal of a single-speed is everything it doesn’t have. With no derailleur to knock out of alignment, no cables to stretch, and no shifting to fuss over, it’s about as low-maintenance as a bike gets, and the chain runs in a perfectly straight line, so it wears slowly and stays quiet.
The case for gears
Gears exist to keep your legs turning comfortably whatever the ground does, and that stops being a luxury the moment the ground tilts. On a single-speed, a hill means standing up and grinding, and a strong headwind feels much the same. Carry a heavy load or a child, or ride any real distance, and the one gear that felt fine on the flat becomes a daily fight.
Most places are not perfectly flat, and most people’s riding varies more than they expect. If you have hills, if you carry things, if you go far, or if you simply want the option to spin easily when you’re tired, gears repay their small extra upkeep many times over. The way to get the most from them is its own quick read: using your gears well. If the deciding factor is a hill or two you’d rather not grind, an e-bike erases them entirely, which which bike is right for you weighs up.
A word on fixed-gear
The fixed-gear bike, or “fixie,” is a single-speed with one crucial difference: the cog is locked to the rear wheel, so the pedals turn whenever the wheels do and you cannot coast. As long as the bike is moving, your legs are moving.
Which one suits you
Choose a single-speed if you ride mostly flat ground, your trips are short, you love mechanical simplicity, or you want a cheap, low-fuss second bike you can leave locked outside without a worry. It’s a lovely way to ride when the terrain cooperates.
Choose gears if you have hills, headwinds, loads, or distance in your regular riding, or if your routes vary enough that one ratio would never suit them all. That describes most people most of the time, which is why gears are the sensible default. If your reluctance is really about one intimidating hill, make friends with the hill may change your mind before the bike does.
This guide covers the durable trade-offs between one gear and many, not specific models. Gear ratios and setups vary widely, and a good bike shop can help you pick a single-speed ratio suited to your terrain if you go that way.
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