Joystar offers the Whizz in four sizes: 12”, 14”, 16”, and 18” for kids from 32” to 57” tall.
Parents appreciate the inclusion of removable training wheels, letter stickers, a bell, and a kickstand (18” build only).
Each Whizz build has a clearly defined age and height range, and parents find the stated fit accurate.
Most buyers say assembly is straightforward.
The height-adjustable handlebar makes it easy to modify fit as children grow.
The full-cover chainguard keeps children’s clothes from getting caught.
Owners praise Joystar's responsive and helpful customer support.

6 reasons not to buy

Kids, especially toddlers on the 18.5lb 12” Whizz, find the bike very heavy and difficult to pedal.
Some kids find the brake lever stiff.
Buyers report receiving the bike with missing or damaged parts, including bent wheels and defective inner tubes.
Some owners report the brake lever or bell breaking within a few days of riding.
Buyers complain that the training wheels are uneven and keep coming loose.
Parents say the assembly instructions are poorly written.

Bottom line

The Joystar Whizz is a budget steel kids' bike available in four sizes for kids 32" to 57" tall (ages 2 to 9). All sizes are very heavy for their intended age ranges. Parents appreciate the included training wheels, adjustable seatpost and handlebars, and helpful customer support. Buyers praise the easy assembly, but the poorly written manual, missing or damaged parts, and misaligned components cause frustration. Additionally, owners complain that parts come loose or fail within days. Most owners think the Whizz offers decent value, but Joystar's weak quality control should be considered.