Quick Facts
A 12 inch Costway kids bike in rose with removable training wheels and adjustable seat and handlebars for children ages 3 to 4.
Best for
Children ages 3 to 4 learning to ride
Key detail
Metal frame, pneumatic tires
Size and fit
12 in wheel, saddle 17.5 to 19.5 in, age 3-4
Consider if
Consider a larger wheel size if child taller than 41.3 in
Shipping
Free US shipping over $100, 30-day returns
The Bike That Grows With Her
A confidence-building first ride with training wheels, adjustable height, and dual brakes for safe, independent adventures.
The Bike That Grows With Her
From Training Wheels to Freedom
From Training Wheels to Freedom

The removable training wheels help your child find her balance at her own pace, then come off when she is ready to ride solo. An adjustable saddle and handlebar mean the same bike fits her through several growth spurts.

Two Ways to Stop Safely
Two Ways to Stop Safely

A hand brake lets her control her speed and stop with confidence, while the rear coaster brake stops the bike by pedaling backward. The fully enclosed chain guard keeps little fingers and clothing away from the chain.

Smooth Rolling on Any Surface
Smooth Rolling on Any Surface

The pneumatic tires are wear and skid resistant, so they grip asphalt, brick, wooden decks, and grass with ease. That means fewer wobbles and a steadier ride wherever the day takes her.

Grows With Your Kid
Adjustable saddle and handlebar height keep the fit comfortable as your child gets taller.
Dual Brake System
Hand brake plus rear coaster brake give kids two intuitive ways to stop confidently.
Four Wheel Sizes
Choose 12, 14, 16, or 18 inch to match your child's age and inseam.
Strong Metal Frame
A sturdy metal frame holds up to years of adventurous, everyday riding.
How to Choose the Right Kids Bike

The right size and features make the difference between a bike your child loves and one that collects dust in the garage.

  1. Measure the inseam: Have your child stand and measure from the floor to the crotch. Compare that inseam to the saddle height range so both feet can reach the ground.
  2. Match wheel size to age: The 12 inch suits ages 3 to 4, 14 inch ages 3 to 5, 16 inch ages 4 to 7, and 18 inch ages 4 to 8. Rider height ranges help you fine tune the pick.
  3. Look for training wheels: Removable training wheels let a beginner build confidence, then come off when she is ready to balance on her own without buying a new bike.
  4. Check the brakes: Younger riders often stop most easily with a coaster brake by pedaling backward, while a hand brake teaches control they will use on bigger bikes later.
  5. Plan for assembly: These bikes ship partly assembled, so set aside time and basic tools to attach the wheels, handlebar, and accessories before the first ride.
Frequently Asked Questions
What age and height is the 12 inch Magic Rose bike for?

The 12 inch version is designed for children ages 3 to 4 with a rider height of 31.5 to 41.3 inches and an inseam of 17 to 18.5 inches. Measure your child's inseam against the 17.5 to 19.5 inch saddle height to be sure both feet can reach the ground.

Can the training wheels be removed?

Yes. The training wheels are fully removable, so your child can start with the extra support and then ride independently once she has found her balance.

How does the bike grow with my child?

Both the saddle and handlebar heights adjust, so you can raise them as your child gets taller and keep the fit comfortable for longer.

Does the bike require assembly?

Yes, some assembly is required. The box includes the bike and a user manual, and you will attach parts like the wheels, handlebar, and basket using basic tools.

What brakes does it have?

It has both a hand brake for controlling speed and stopping, and a rear coaster brake that stops the bike when your child pedals backward. This gives new riders two intuitive ways to stop.

How does shipping and returns work?

The bike ships from a US warehouse, and we offer free US shipping on orders over $100. Returns are accepted within 30 days, and our human support team is here if you need help.

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