The bike comes with yellow tire & single speed, only little maintenance needed due to the simple design. Amazing design and color! Little Princess Girls bike with Bright colors, stylish and charming. Soft seat offers more comfort in riding. The children bike comes with 85% Pre-assembled body and the basic assembly tools, normally takes a novice about 30 minutes to assemble it. Extra strong pneumatic air filled tyres. Front calliper brake and rear band brake. Heavy duty removable adjustable stabilisers. Material: Steel + Plastic + EVA Rubber. 12 Inch Bike(suitable for children aged 2.5-4.5 years old). Seat to ground distance:45-56cm. Handle to ground distance:62cm. Handle to ground distance:68cm. 16 Inch Bike(suitable for children aged 5-8 years old). Seat to ground distance:55-70cm. Handle to ground distance:73cm. We suggest you refer to the specific size of our bike, because the height of each child is different. 1 x Kids bike. All items and parts of the product must be checked for any damage prior to assembly. Products must be undamaged, in original packaging (except faulty products). Please pack items carefully when returning them. We try our best to reply to your emails as soon as possible, due to high volume of daily incoming emails and time zone difference, we may not be able to reply your emails immediately.