Quick Facts
A Costway adjustable kids bike with training wheels and brakes, sized for children aged about 3 to 8 years depending on wheel size.
Best for
Children learning to ride, ages 3 to 8 by wheel size.
Key detail
Carbon steel frame
Size and fit
Suitable ages 3 to 8 years, varies by wheel size
Consider if
Consider a different wheel size if child falls outside height range
Shipping
Free US shipping over $100, 30-day returns
A First Bike Built to Grow With Them
With adjustable height, dual brakes, and removable training wheels, this bike helps little riders find their balance and their confidence.
A First Bike Built to Grow With Them
Grows Alongside Your Child
Grows Alongside Your Child

Both the saddle and handlebar height adjust as your child gets taller, so the bike keeps fitting through growth spurts. That means more seasons of riding from a single purchase.title.set.

From Training Wheels to Two
From Training Wheels to Two

The removable training wheels give beginners the stability they need to feel safe. When your child is ready, take them off and let them practice balancing on their own.

Two Ways to Stop Safely
Two Ways to Stop Safely

A hand brake sized for small hands works alongside a rear coaster brake, so kids can stop quickly however they instinctively react. The fully enclosed chain guard keeps little fingers away from moving parts.

Adjustable Fit
Saddle and handlebar height adjust to keep pace with your growing rider.
Dual Brake System
Hand brake plus rear coaster brake give kids reliable, easy stopping power.
85% Pre-Assembled
Arrives mostly built with a guide, so setup takes minutes and no extra tools.
Sturdy Steel Frame
Carbon steel frame with anti-slip pneumatic tires is made for lasting everyday use.
How to Choose the Right Kids Bike

Getting the size right matters more than age alone, so here is what to check before you buy.

  1. Measure rider height: Rider height is the most reliable guide. This bike comes in 12, 14, 16, and 18 inch wheel sizes covering roughly 31.5 to 59.1 inches of height.
  2. Check the inseam: Measure your child's inseam and compare it to the saddle height so their feet can reach the ground comfortably while learning.
  3. Look for training wheels: Removable training wheels let a beginner build stability first, then transition to balancing on two wheels when they are ready.
  4. Prioritize the brakes: A hand brake sized for small hands plus a coaster brake gives kids two intuitive ways to stop, which is reassuring for new riders.
  5. Plan for growth: An adjustable saddle and handlebar stretch the useful life of the bike, so you are not shopping again next year.
Frequently Asked Questions
What age and height is the 12 inch bike for?

The 12 inch size suits children about 3 to 4 years old with a rider height of 31.5 to 41.3 inches. Larger wheel sizes are available for taller and older kids.

Does it come with training wheels?

Yes. Removable training wheels are included so beginners can build confidence, then come off easily once your child is ready to balance on their own.

How much assembly is required?

The bike arrives 85% pre-assembled and includes a guide, and no extra tools are needed. Most parents finish the setup in just a few minutes.

How does the braking work?

It has a hand brake with a shorter reach for small hands and a rear coaster brake that stops the bike when your child pedals backward. A fully enclosed chain guard protects little fingers.

Does it have a kickstand?

The 12 inch bike does not include a kickstand. A kickstand is included with the 18 inch size for easy parking.

How does shipping and returns work?

This ships from our US warehouse, and orders over $100 qualify for free US shipping. We also offer 30-day returns and real human customer support if you need help.

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"I was lucky to find this pad for my grandson’s bassinet. I like how it is all natural snd organic. Just make sure to buy it a little bigger because it shrinks after washing. Also give ample time…"

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★★★★★

"Perfect. Great price and my little one very opposed to training has only had accidents in the last week. My daughter is 2yrs old, 27 lbs and the Medium is perfect. She has room in them but the arent…"

E
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Verified buyer · April 2, 2026
★★★★★

"Initially, I was skeptical of using it, but when my doc referred it to me for my cracked nipple, it worked like a charm. I did not want to put any balm or lotion over my nipple as I did not wanted…"

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"Only paci my breast feed three week old has accepted so far🙌🏼"

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"Love these , I bought due to damage from pumping . One week with creams and balms didn’t do much but two days with these and I’m almost healed !"

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"Did the job, kept me more comfortable the first couple weeks postpartum as breastfeeding was established. Next time I would go for the design that has perforated holes for airflow."

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"As a breastfeeding mom I truly couldn’t recommend these more. They literally SAVED MY LIFE in the newborn stage and then saved me again when teething started. They’re easy to use, easy to clean and…"

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"This is a great item to have for breastfeeding mommas. It feels very cooling and refreshing after breastfeeding and makes wearing nursing bras very comfortable since the fabric is not rubbing on your…"

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"These cups protect and help heal sore nipples so quickly. Comfortable under a bra, easy to clean, and worth the investment for breastfeeding. Stats: 5’3”, 140 lbs, 8 weeks postpartum & nursing"

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"Had a cracked nipple, added some organic ointment and put this over it, healed in 2 days! Recommend it 100%"

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"These are great for nursing in the first few weeks when there’s soreness and breakdown. Would recommend!"

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Julie
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"These were wonderful for me postpartum while learning to breastfeed. Highly recommend. They are easy to clean & very functional."

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"It saved my nipples multiple times. They’re super light. Quality is good, they do bend for no reason lol overall a good product."

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"These were great in the beginning helped me so much."

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