Kids bikes comes in different sizes. 12" and 14" models are suitable for ages 2 to 4 years or a height of 36" to 41". The 16" models listed above are suitable for ages 4 - 5 or a height of 41" to 43". Dino bikes have bikes for kids across all sizes, however, including 20" models for ages 5 to 8 years or a height of 44" to 54". Best Kids Bikes Dino bikes for kids, as listed above, come in a wide range of styles that represent famous and much-loved characters from TV and movies. From the Teenage Mutant Ninja Turtles to Barbie and Hello Kitty, Dino bikes have all the favourites covered. These kids bikes do not have any gears and they come with removeable stabilisers, so are ideal for little ones who are just learning to ride a bike. The recommended age for these Dino Bikes kids bikes is 5 to 7 years. Dino Bikes Kids