What a city bike is built for
A city bike is designed for short rides on mixed urban surfaces, with minimal maintenance, at modest speeds, dressed in regular clothes. You do not lean over drop bars. You sit upright, see traffic clearly, and ride at a pace that lets you arrive without a change of clothes. The tyres are thick enough to cope with potholes and broken glass. The mudguards keep dirty water off your back and legs.
This is not a fitness bike, a commuter bike for long distances, or a recreational bike for weekend rides. For longer commutes over ten miles, a hybrid or flat-bar road bike will be faster and less tiring. For weekend rides in the country, a hybrid or gravel bike is more versatile. But for pottering to the shop, getting to the station, and short urban runs, the city bike is the right tool.
Hub gears versus derailleurs
Most quality city bikes in the UK are fitted with internal hub gears, typically Shimano Nexus 3 or 7 speed, or in higher specifications, the Shimano Alfine 8 or 11 speed. Internal hub gears are almost maintenance free. The gears are inside the hub, protected from the weather, and they need an oil change once every few years rather than constant adjustment.
A Sturmey Archer 3 speed is the classic British city bike hub gear. Parts are available, they last for decades, and they still work after being left outside all winter. A well-kept Sturmey Archer equipped Raleigh or Dawes from the 1980s will still shift crisply today.
Derailleur-equipped city bikes need slightly more attention. Cables need replacing every couple of years, the chain needs lubricating regularly, and the mechanism is exposed to the weather. That said, a derailleur city bike is usually cheaper to buy on the used market, and a basic 7 or 8 speed system is genuinely low maintenance in practice.
Typical prices on Cyclesite
Under two hundred pounds you are in older, often Dutch-style city bike territory. Raleigh, Dawes, Apollo and some older Batavus or Gazelle models. Condition is everything. A quick service and fresh consumables will bring many of these bikes back to everyday use.
Two hundred to five hundred pounds buys genuinely good city bikes from Specialized, Giant, Cube, Trek, or Pashley for the more traditional style. Hub gears, proper mudguards, rack already fitted. Most bikes in this price range will keep running for years with basic maintenance.