A commuter bike needs to do one thing well: get you to work reliably, in all weather, without costing a fortune to run or requiring constant mechanical attention. That's it. The best commuter bikes are the boring ones that just keep going. They don't win races, they don't impress at the cycling club, and they don't look good hanging on a wall. They start on a Monday morning in January when it's dark, wet, and 3°C, and they do the same thing every day until you decide to stop riding — at which point you sell them to someone else who needs the same thing. For rides under 5 miles each way on flat ground, a single-speed or fixed-gear bike is almost impossible to beat for pure hassle-free commuting. One gear, one chainring, no derailleurs, no cable stretch, no indexing adjustments. The chain needs oiling and the tyres need air. That's the maintenance schedule. Brands like Quella, Brother Cycles, and Brick Lane Bikes make purpose-built fixies for London and other flat-city commuting. A secondhand one costs £150–£400 and will run for years on £20/year in consumables. For longer commutes or hilly routes, a flat-bar hybrid with internal hub gears is the gold standard for zero-faff daily riding. Shimano Nexus (3, 7, or 8 speed) or Alfine (8 or 11 speed) hubs shift under load, work in any weather, and need servicing roughly once a year. They cost more than derailleur gears upfront but the time and frustration they save over a wet British winter is worth every penny. You shift gears by twisting a grip on the handlebar — it works at a standstill, in the rain, covered in mud, with frozen fingers. Look for hybrids from Cube, Giant, Trek, and Gazelle with internal hub gears — they appear secondhand regularly when companies rotate their fleet bikes or Cycle to Work scheme bikes reach the end of their agreement period. Mudguards and a rear rack are non-negotiable for year-round UK commuting. Without mudguards, any ride on wet roads leaves a stripe of dirty water up your back and spray in your face. Without a rack, you're carrying everything in a rucksack against your back, which traps heat and guarantees you arrive at work sweaty regardless of pace. If the bike you're looking at doesn't have them, check it has the mounting points — eyelets on the fork and rear triangle. Fitting full mudguards to a bike without eyelets is possible with clip-on guards but they're flimsier, leave gaps, and look like an afterthought. Theft is the elephant in the room and the thing that should shape your commuter bike budget more than any other factor. The UK loses roughly 300,000 bikes to theft every year, concentrated in city centres, at train stations, and at workplaces. Your commuter setup needs a security plan, not just a bike. The minimum: a Sold Secure Gold rated D-lock (Kryptonite New York, Abus Granit X-Plus) through the frame and rear wheel, locked to an immovable object. Better: D-lock through the frame plus a cable through the front wheel. Best: two D-locks if you're leaving the bike all day in a high-theft area. A good lock costs £50–£100 and weighs 1.5–2kg. That's cheaper and lighter than replacing a stolen bike. Lights are a legal requirement after dark and a practical necessity at dawn and dusk — which in a British winter means both ends of most commutes. Minimum brightness for being seen in urban traffic: 200 lumens front, 50 lumens rear. For unlit roads, 400+ lumens front. USB-rechargeable lights from Lezyne, Exposure, or Cateye cost £30–£80 for a decent set and last 3–5 years. The £8 lights from supermarkets dim after a month and the plastic mounts crack when it's cold. Buy once, buy decent. Maintenance on a commuter bike is simple if you stay on top of it: lube the chain every two weeks (once a week in winter), check tyre pressures monthly, replace brake pads when the wear line shows, and clean the bike once a month or after any heavy rain ride. A commuter bike that's maintained costs about £100–£150 per year in consumables and shop time. One that's neglected costs £200+ in a single visit when the seized chain, corroded cables, and worn brake pads all need fixing at once. The Cycle to Work scheme is worth understanding for the secondhand market. Companies buy bikes for employees through salary sacrifice, and when the hire period ends (typically 12 months), the employee buys the bike at a "fair market value" (usually 3–7% of the original price). Many of these bikes are lightly used commuters in good condition. When the new owner decides cycling isn't for them, the bikes appear secondhand at reasonable prices. A Cycle to Work hybrid that cost £800 new, was written down to £50 at the end of the scheme, and then sold secondhand for £200–£300 is a genuine bargain for the buyer.