Front-mounted child seat
Also called · front child seat · mini seat — used for the small front seats that mount at the stem or top tube
A small child seat mounted ahead of the rider — at the stem, head tube, or top tube — so the child sits within your arms and shares your view of the road. It suits younger, lighter passengers and has a lower weight ceiling than a rear seat.
How to spot itThe child is in front of the adult, framed by their arms, usually with small footrests either side of the head tube and the adult's knees splayed slightly wide to clear the seat.
Best forYounger toddlers on short, calm trips — the arrangement where you can talk to each other, and where you can feel exactly what the child is doing.
Watch outThe weight sits right where you steer, so the bike handles differently — practice somewhere quiet before traffic. Fit the seat only to a bike it is actually made to fit, and follow the seat's own weight and age limits rather than a general rule of thumb; a child who cannot yet sit up unsupported and hold their head steady in a helmet is not ready for any bike seat, and pediatric guidance is to wait, commonly given as around a year, with your pediatrician the right person to ask about your child. Once they ride, a helmet that meets the CPSC standard, correctly fitted, is not optional.
You might say“the little seat where the kid sits in front of you”“a child riding between the parent's arms”“the toddler seat on the crossbar”“the seat where you can see the child's face”
Source · Child bicycle seat manufacturer fitting, age and weight-limit documentation (Thule, Yepp, Bobike); American Academy of Pediatrics — guidance on carrying young children by bicycle; US Consumer Product Safety Commission — bicycle helmet safety standard (16 CFR Part 1203) · 2026-07
Rear-mounted child seat
Also called · rear child seat · rack-mounted child seat — the kind that clamps onto a rear rack rather than the frame
A child seat mounted behind the rider, either clamped to the seat tube or carried on a rear rack, with a harness, a supportive back, and enclosed footrests. It takes a bigger, heavier child than a front seat.
How to spot itA molded shell behind the adult, higher than the saddle, with a shoulder harness and the child's feet in enclosed rests — and often a sleepy child leaning against the back of it.
Best forOlder toddlers and small children, and the most common everyday arrangement — simple, widely available, and it fits many bikes you already own.
Watch outIt raises the bike's center of gravity, so the bike is most unstable exactly when you are stopped and lifting a leg over — hold the bars and the bike, not just the bike. The seat's own weight limit and the rack's rated capacity are two different numbers and both apply; ride by the lower one. A helmet that meets the CPSC standard, correctly fitted, is not optional.
You might say“the child seat behind the saddle”“the kid seat over the back wheel”“the seat with the high back and the harness”“where an older toddler rides behind the parent”
Source · Child bicycle seat manufacturer fitting, age and weight-limit documentation (Thule, Yepp, Bobike); US Consumer Product Safety Commission — bicycle helmet safety standard (16 CFR Part 1203) · 2026-07
Child trailer
Also called · bike trailer · kid trailer · chariot — a generic borrowing from an early trailer brand, more common in Canada
An enclosed two-wheeled trailer towed behind the bike, seating one or two children low to the ground with a harness, a weather cover, and room for the shopping. It is a separate vehicle rather than a load on your bike.
How to spot itIt rides behind and below, on its own two wheels, usually with a fabric shell, a zip-open front, and a tall flag on a pole. Many convert to a stroller once you park.
Best forOne or two children, longer or mixed rides, and bad weather — it is low, stable, weather-protected, and it does not change how your bike handles nearly as much as a seat does.
Watch outIt is wide and it sits low in a driver's sightline — the flag exists for a reason, and so does thinking about where you route. Use the trailer's own harness and follow its age and weight limits; a very young infant who cannot hold their head steady does not belong in one, and the maker's minimum age is the number to ride by. Every child riding in it still needs a helmet that meets the CPSC standard, correctly fitted.
You might say“the covered pod towed behind a bike”“the little buggy the kids ride in behind”“the trailer with two wheels and a mesh window”“the thing that keeps the rain off the children”
Source · Child bicycle trailer manufacturer fitting, age and weight-limit documentation (Burley, Thule); American Academy of Pediatrics — guidance on carrying young children by bicycle; US Consumer Product Safety Commission — bicycle helmet safety standard (16 CFR Part 1203) · 2026-07
Cargo-bike child seating
Also called · bench seat — the bench-and-harness seating inside a front-box (bakfiets) cargo bike · rear deck — the padded rear platform an older child rides on along a longtail · monkey bars — the padded grab rails that enclose a passenger space on a longtail; also sold as buddy rails or a clubhouse
Child seating built into a cargo bike itself — a bench and harnesses inside a front box, or a padded deck with handrails and footboards along an extended rear. The bike is designed around carrying children, rather than adapted to it.
How to spot itThe children are part of the bike's shape: sitting in a box ahead of the rider, or in a row along a stretched rear rack with proper handrails and running boards. Almost always electric.
Best forTwo or more children and daily school-and-shop life — the arrangement that genuinely replaces car trips, and the one children can climb into themselves.
Watch outIts own budget, its own storage problem, and a bike this heavy handles differently loaded than empty — practice before the school run, not during it. Use the harnesses and rails the bike was built with, ride by the bike's own rated capacity, and helmet the children anyway.
You might say“the kids sitting in a box on the front of the bike”“the long bike with children on the back”“the bench where two kids ride facing each other”“the bike that replaced the family car”
Source · Cargo and family bike manufacturer capacity and child-seating documentation (Urban Arrow, Yuba, Tern); US Consumer Product Safety Commission — bicycle helmet safety standard (16 CFR Part 1203) · 2026-07
Trailer cycle
Also called · tag-along · trailer bike · third wheel — an informal name for the same thing
A one-wheeled half-bicycle — saddle, pedals, handlebar — that hitches to the adult's bike so a child pedals along without steering or braking. It is the bridge between riding as a passenger and riding their own bike.
How to spot itA child pedaling behind the adult on what looks like a bicycle cut in half, with its single wheel following and no front wheel of its own.
Best forA child who has outgrown a seat and can pedal, but is not ready to ride a bike of their own in traffic — it keeps them riding with you and lets them contribute.
Watch outThe child can pedal but cannot steer or brake, so every judgment is still yours, and the hitch makes the pair long and slow to maneuver. Follow the maker's fitting instructions and weight limit for the specific hitch and bike, and helmet the child as you would on any ride.
You might say“the half-bike attached behind the parent's bike”“the kid pedaling on the back with no front wheel”“the bike that hitches on so a child can pedal along”“the thing between a child seat and their own bike”
Source · Trailer-cycle manufacturer fitting and weight-limit documentation (Burley, Adams); US Consumer Product Safety Commission — bicycle helmet safety standard (16 CFR Part 1203) · 2026-07
This page names things; it doesn't sell them. Picks and prices live in the buying guides, where they're disclosed.