Replacement Tire

Give your kid's bike a fresh start with a proper knobby tire built for real riding. This 16x2.125 (ISO 57-305) tire fits the standard 16-inch kids' bike rim used by most major manufacturers, so replacing a worn, flat, or damaged tire is straightforward — no guesswork on sizing.

The chunky square knob tread grips well on mixed surfaces: pavement, packed dirt, gravel, and grass. The directional pattern is marked right on the sidewall with a rotation arrow, so installation is always correct. Nylon construction keeps the casing rigid under load and resistant to pinch flats.

Inflate to 35-45 PSI (240-310 kPa). Compatible with standard 16x1.75/2.125 inner tubes. Sold as a single tire — tube not included.

• Standard 16x2.125 (57-305) size — fits the most common 16" kids' bike wheel. Compatible with nearly all 16-inch children's bicycles from major brands. ISO/ETRTO standard bead fits 305mm rim diameter.
• Aggressive knobby tread pattern — chunky square knobs with a directional layout for traction on pavement, gravel, grass, and light trail. Great for adventurous kids who don't stick to the sidewalk.
• Nylon construction — durable nylon casing provides puncture resistance and maintains shape under load. Rated for 35-45 PSI (240-310 kPa / 2.4-3.1 bar).
• Directional installation — rotation arrow molded into the sidewall makes correct installation foolproof. Optimizes tread engagement and rolling efficiency.
• Drop-in replacement for worn or damaged tires — compatible with standard Schrader or Presta inner tubes for 16x2.125. Ships flat, mounts easily by hand or with standard tire levers.