Key information: bike dimensions 49.21"L x 26.18"W x 29.53"H, Net weight 50.71lb, handle bar accembling required, Oil mix required( Read detail in Manual ), Pull Start, Handle throttle, pressure air tires. Rider can experience the speed of it, but safety power with the 49 cc 2-stroke engine and fully automatic chain transmission system. Maximum speed will be 20 mph for this dirt bike Mini dirt bike provides easy pull start operations, and kids can start the 49cc dirt bike up easily. Low-pressure pneumatic tires provide soft & smooth ride. the gas powered dirt bike for kids provides easy pull start operations, and kids can start the 49cc dirt bike up easily. Low-pressure pneumatic tires provide soft & smooth ride. EPA Approved, it means the kid's dirt bike will not cause unreasonable adverse effects in users’ health under the instruction manual, and it’s environmentally and it has low noise.