ATV/4-Wheeler/Quad Sizes Chart For Childrens & Adults

Similar to when shopping for other vehicles, referring to the 4 wheeler size chart is important for safety and comfort. A quad that is too big for your body poses dangers, especially for children. 

Though the dimensions are not universal, you can find certain guidelines in choosing based on age or engine type. If you have no idea about it, dive into our article below!

4 Wheeler Size Chart By Engine Size

The actual dimensions of an ATV vary depending on the manufacturer and specific model. For example, some designs come up with aftermarket tires or widening kits that make them longer or wider than the factory standard.

The market today serves a lot of ATV models with different sizes. Hence, we can only list the average range of ATV width and length for each engine type. Please check with the dealership or read the owner’s manual for the precise answer.

Engine SizeLength In InchesWidth In Inches

After searching hundreds of ATVs, we have come to some conclusions: Just because four-wheelers are longer than those with smaller engines does not mean they are wider. Hence, people should consider both factors to find the best one.

Besides, sports quads are usually smaller than utility ones. This aspect relates to your intended riding manner (we’ll mention it in the following section).

Recommend ATV Sizes By Age

ATV Sizes By Age

These AVTs with engines under 90cc are ideal for children under 12. Meanwhile, teen riders should refer to 90cc to 250cc models. Only those over 16 years old can handle engines over 250cc well.

Note: children under 6 are not allowed to drive an ATV.

Children ATV Sizes

The 50cc off-road bikes are a safe choice for kids as they are limited in speed and power. Most 6-10-year-olds start with the smallest ATV (50cc) for great safety.

As they get older, from 10 to 12 years old, they can switch to quads with a maximum engine capacity of 70cc. These models feature average heights from 25 to 35 inches – suitable for the body development of this age range.

All ATVs designed for children typically feature a maximum speed of 18 mph. The manufacturer also installed a throttle limiter for parents to keep their babies in control.

ATV Sizes For Teens

Most ATV drivers said they started their adventurous journey between 12 and 16. They usually begin with a 90cc engine and then work their way up the ranks.

However, you may consider a larger model if your physical body is bigger than your peers. As you accumulate a lot of skill and driving experience, considering the 200cc engine size is a great idea to enjoy the increased power and speed. 

Again, make sure your physical strength can handle the average dimension of 65-70 inches long and 40-43 inches wide.

4 Wheelers For Adults

Models with a capacity of over 250cc are considered the best ATV size for adults over 16 years old. Fortunately, you have more engine choices to enjoy other performances.

Some manufacturers may divide this category into “mid-size” and “large size.” The first group includes options such as 300cc, 350cc, 400cc, and 450cc, which produce top speeds between 40 and 60 miles per hour. 

The second and fourth options (350cc and 450cc) are no longer popular, so you may have a hard time finding those still available in the market.

The large-size group includes all adult models from 500cc and above. They possess fast and powerful machines to conquer tough terrain or endure heavy-duty loads. Aggressive looks and speeds of over 70 mph probably remind you of a ferocious giant monster.

What To Consider When Shopping For An ATV?

ATVs are for off-road use only

Engine Size

We mean the match between the engine type and the driver’s experience. You bet your life while piloting a 1000cc machine in the first races.

In addition to the age-rated recommendations mentioned above, we list some safety guidelines based on expertise, mostly for adults.

Riding LevelEngine Option
Experienced teens, new riders, or small adults150-300cc
New riders work on easy trails or perform light jobs300-500cc
Large adults or experienced riders who handle the heavy-duty load500-700cc
Professional racers or someone who has rich experience on off-road trails700-1000cc

ATV Dimensions

The physical size matters due to its legality and impact on your riding experience. For example, wide models allow for better corner handling to limit the risk of tipping over. As a result, racers gain an advantage on the track when they can maintain a high speed when turning.

However, some states limit the maximum width to 50 inches for four-wheelers on the trails. You can also get stuck on a narrow road or bump into obstacles and cause traffic jams. Either way, you are bound to get in trouble. Hence, make the right choice and have comfortable rides!

Automatic Transmission And Power Steering

If you have a large budget, don’t hesitate to invest in these two features that give you more control over your quad. Other features worth considering include an improved suspension, custom seats, or aftermarket tires. It’s up to the owner to pay this little extra, but it’s worth it if you want a comfortable seating space on your ATV.

Your Riding Habits

The market is flooded with products of different sizes. It would help to consider the riding style based on your usage purpose.

For example, a utility ATV is heavy and slow but provides strong power to work on the farm. Meanwhile, the sporty models allow you to accelerate to conquer dunes or trails.


What Are The Common Sizes Of ATVs?

The standard ATV is 70-80 inches long and 43-45 inches wide. Based on this criterion, you can find three other classifications, including:

  • Children’s quad: 50-60″ long and 30-40″ wide
  • Small quads: 65-70″ long and 40-43″ wide
  • Large quads: 85-95″ long and 45-48″ wide

What Is ATV Used For?

Most ATVs perform one of three main functions: utility, sports, or crossover. The first options are built for working purposes, while the second is for adventurous performances. As its name suggests, the remaining does well in both worlds.


As you have seen above, the ATV dimensions are bigger with larger engine size. Regardless of where your choice develops, it is necessary to combine several other factors before making a decision. 

It may take you a long time, but don’t give up! You need the right vehicle to ensure optimum performance and safety.

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Daniel Barker


Daniel Barker was introduced to racing in 2006 when he experienced his first track day on his Suzuki sv650. With more than 15 years of experience on his track. Daniel is known as for his high-energy riding, drifting, precision stoppies and technical riding ability on virtually any motorcycle.

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