Q&A
The tires are inflatable.
It suitable for more than 85cm.
Proper seat height should have the child sitting on the saddle, with feet flat on the ground, with a slight bend in the knees. For long distance striding on smooth surfaces, you can adjust slightly up. For obstacles, tricks, and off-road riding, the saddle should be adjusted for slightly more bend in the knees.
It has four colors. black, bule .green. grey.
Yes, it can. And it can quick adjustable without tools.
Yes, it has EN71 and ST.