Dynacraft Magna Sapphire Kids BMX Bike - Steel Frame, Coaster Brake, Adjustable Seat
- Kids' Bike
- 16 in
- 4-8 years
- Coaster
- Cheaper than 60% of kids' bikes
- Better rated than 80%
- More reviewed than 74%
Amazon Associate · we may earn from qualifying purchases. Prices & availability last checked Jul 8, 2026.
The Dynacraft Magna Sapphire is a kids' BMX bike with a sturdy steel frame, coaster brake, and adjustable seat, designed for riders ages 6-10. This single-speed bike is ideal for outdoor riding on gravel and roads, offering a reliable and fun experience for beginners.
- Sturdy steel frame for durability and stability
- Coaster brake for easy, intuitive stopping
- Adjustable seat to grow with your child
- Includes kickstand for convenient parking
| Brand | Dynacraft |
| Model | 8059-54 |
| Wheel Size | 16 in |
| Age Range | 4-8 years |
| Brake Style | Coaster |
| Frame Material | Alloy Steel |
| Number of Speeds | 1 |
| Color | Pink |
| Weight | 19.8 lbs |
Easy to assemble with clear instructions, sturdy steel frame, smooth ride, responsive hand brakes, adjustable seat, and overall great value. Kids love the look and comfort.
- Kids learning to ride
- Gift for young riders
Some issues with training wheels moving slightly, tires needing inflation out of box, and size may run small for taller kids. Lack of clear size guidance.
- Training wheels move slightly
- Tires need pumping out of box
- Size may run small
How it ranks among the 150 kids' bikes we track
4.6★ across 870 Amazon reviews, weighted by review volume.
Cheaper than 60% of the kids' bikes we track.
More reviewed than 74% of the category.
Scores are computed from the 150 kids' bikes we track: Amazon rating weighted by review volume, with price and demand ranked against the category. Data-driven, not a hands-on test. Scored by Jake Torres, sports & outdoors editor.
Questions about the Dynacraft 8059-54
Common buyer questions answered straight from the product spec data — no fluff, no "it depends".
Is the Dynacraft Magna Sapphire suitable for a 7-year-old?
Yes, the Dynacraft Magna Sapphire is designed for children ages 6-10, making it a great fit for a 7-year-old.
Does the Dynacraft Magna Sapphire have hand brakes or coaster brakes?
It features a coaster brake, which is engaged by pedaling backward, ideal for beginner riders.
What is the frame material of the Dynacraft Magna Sapphire?
The frame is made of sturdy steel, providing durability and a solid ride.
Does the Dynacraft Magna Sapphire come with a kickstand?
Yes, a kickstand is included for easy parking when not in use.
How many speeds does the Dynacraft Magna Sapphire have?
It is a single-speed bike, offering simplicity and ease of use for young riders.
