Built specifically for the Strider rider who is ready to up their game, the High-Traction Wheel Set can take the heat on whatever terrain your kiddo throws at them. Pneumatic tires provide maximum grip for riding both on- and off-road, and the black allow hubs and rims make them look good while doing it. The sealed bearing keeps lubricant in and contaminants out. And, while your kiddo may be rough and tumble, the Flush Axles will at least keep their little legs from getting scraped and bumped by the screw head. These wheels are the perfect upgrade to improve riding skills and reinforce confidence. Fits the Strider 12 Sport and 12 Pro.