How do I carry a child on a bike safely?

Carrying children by bike is entirely normal across much of Europe and increasingly here, and the equipment is good. The decisions are about the child's age and size, how far you go, and how you handle a bike that now weighs a great deal more than it did and falls over more easily when stopped.

Safety

What you'll need

• A child seat or trailer rated for the child's weight
• A helmet that fits the child
• A rack or mount compatible with your frame
• A double-legged parking stand
• Blankets or a suit for the child

Step by step

1. Wait until the child can sit unsupported and hold their head up wearing a helmet.Manufacturers usually give a minimum of around nine months for seats and trailers, and the real test is head and neck control with the added weight of a helmet. Below that, cycling with a baby is not appropriate — there is no safe carrier for it.
2. Choose the carrier type deliberately.A front seat between your arms suits small children, keeps them where you can talk to them and see them, and affects steering. A rear seat carries more weight and older children, and puts them behind you and out of view. A trailer is the most stable and the most weather-protected, is very hard to tip, but is wide and low in traffic. A tag-along or trailer bike lets an older child pedal. A cargo bike carries two children and the shopping and replaces the car.
3. Check the weight limits, and the bike's.Every seat, rack and trailer has a maximum load; so does the rack mount, the frame and often the wheels. Check the seat's limit and the rack's limit and use the lower. Suspension frames, carbon frames and many lightweight road bikes are not rated for child seats at all.
4. Fit spoke protection.A child's foot going into the rotating spokes is the classic injury with rear seats, and it is severe. Use a seat with fully enclosed footrests and straps, and fit a wheel guard or skirt guard. Check the straps every single time.
5. Use the harness properly.A five-point harness, done up, adjusted so it is snug over the shoulders and hips. Children work themselves loose from a slack harness surprisingly quickly and lean out to look at things.
6. Fit a proper stand and use it before loading.A loaded child seat makes the bike massively top-heavy. A double-legged centre stand holds it upright; a single side stand often will not. Lift the child in with the bike held or standing securely, and always take them out before you take the bike off the stand.
7. Dress the child for standing still, not for riding.They are not generating any heat. In cold weather they need considerably more than you do — a suit, gloves, warm feet and a blanket — and in the sun they need shade and cover, because they are sitting in it without a breeze doing the work.
8. Ride differently.Everything is slower. Braking distances are longer, corners feel different, the bike wobbles at low speed, and getting on and off needs planning. Ride further from the kerb, take quieter routes, and give yourself far more time and space at junctions.
9. Practise before you carry a child.Load the seat or trailer with equivalent weight in a bag and ride it around somewhere quiet. The handling difference is significant and you want to meet it without a passenger.
10. Sort out the child's helmet.It must fit properly, and a seat with a high back can push a round helmet forwards and tilt the child's head. Helmets designed for child seats have a flattened back for this reason.
11. Check everything before each ride.Mount bolts, harness, footrest straps, trailer hitch and safety strap, tyre pressures, brakes. A trailer hitch has a secondary strap for a reason — use it.

Tips

• A trailer that converts to a buggy earns its money — you arrive, unhitch, and walk into the shops with it.
• Bright colours and a flag on a trailer matter, because a trailer sits below the eye line of drivers in large vehicles.
• Take snacks, and expect to stop. A bored child in a seat is a wriggling child.
• Front seats block your view of the front wheel and make it hard to see potholes. Take a route you know.
• In law, carrying a child is legal on a bicycle only where the machine is constructed or adapted for it — a purpose-made seat or trailer is what makes that true.

Common mistakes

• Using a soft baby carrier or sling while cycling — The child is unrestrained relative to the bike, unprotected in a fall, and their head is unsupported. There is no version of this that is safe.
• Leaning a loaded bike against a wall and stepping away — A child seat makes a bike fall over far more easily than an adult expects, and the child falls from height with no way to protect themselves.
• Skipping foot restraints because it is a short ride — Feet in spokes happens in a moment and causes serious injury. Straps take ten seconds.

Alternatives

• Front-mounted child seat: Roughly 9 months to 3 years, up to around 15kg. Child is in view, sheltered by you, and part of the conversation. Steering is affected and your knees may hit it.
• Rear-mounted child seat: Roughly 9 months to 5 or 6 years, up to around 22kg. More capacity, less interaction, and the bike becomes very top-heavy when stationary.
• Child trailer: From around 9 months up to two children. Very stable, weatherproof, doubles as a buggy on many models. Wide, low to the ground, and needs care at junctions and on narrow paths.
• Tag-along or trailer bike: From around 4 to 8 years. The child pedals and learns road sense without needing to balance or steer. Long, and the child can lean.
• Cargo bike: Box or long-tail designs carrying two or more children plus luggage. Expensive, heavy, needs secure storage, and genuinely replaces car trips.

Questions people ask