Depending on the state and the specifications of the quad bike, it is legal to ride a quad bike on the street. Laws vary from state to state, so it is important to check with the local Department of Motor Vehicles (DMV) to verify the laws about riding quad bikes on the road with a specific state. Most DMVs have a website containing all the specific laws and rules about riding quad bikes, and can be easily found with using a Google/Yahoo search. These laws specify how and where a person can ride a quad bike, and what features the quad bike needs to have to be considered street legal. There is no standard engine size for a street legal quad bike, as it varies from state to state, so be sure to check with the state DMV on what their qualifications are for minimum engine size.
There are a few basic guidelines that are universal across all the state DMVs. For a quad bike to be road legal, it must include functioning turn signals, headlights, brake lights, and a rear view mirror. It is also suggested that the rider modify the bike with a sway bar and road tires. A sway bar is an anti-rolling device that is part of the quad bike’s suspension, and increases resistance to roll in turns.
There are two main categories for street tires: primarily asphalt and primarily off road. Primarily asphalt tires are similar to automobile tires, and are intended for street quad bikes that rarely leave the road. Primarily off road tires are more of a dual sport tire, in that they are designed for off-road riding, but can be kept on the road for longer distances than normal tires. The rider will also need proper licensing, registration, insurance and paper work. The licensing required to ride a quad bike on the road falls under the basic motorcycle license, which can be obtained from the state DMV. There also may be a minimum rider height regulation which limits who can ride on the road based on their height. Check with your local DMV to get a full list of the rules and regulations involved with riding quad bikes on the street.
Here is a dude legally rolling on the open road!