Choosing the right size bike for a 6-year-old can be confusing, but there are several factors to consider. Kids bikes are sized by the diameter of their wheels, and the most common wheel sizes for 6-year-olds are 16" and 20". However, its important to keep in mind that children grow at different rates, so its best to also consider their height and inseam length when selecting a bike. Here are some general guidelines for choosing the right size bike for a 6-year-old:

• Wheel size: The most common wheel sizes for 6-year-olds are 16" and 20".

• Height: A 16" bike is generally a good fit for a child who is between 37" and 40" tall, while a 20" bike is a good fit for a child who is between 40" and 45" tall.

• Inseam length: A childs inseam length is also an important factor to consider when selecting a bike. For a 16" bike, the inseam length should be between 16" and 22", while for a 20" bike, the inseam length should be between 19" and 25".

Its important to note that these are general guidelines, and the best way to determine the right size bike for a child is to have them try it out and make sure they can comfortably reach the pedals, handlebars, and brakes.