What Size BMX Bike Do I Need?

Find out what size BMX bike you need with our easy to use size guide. With a few simple measurements, you’ll be on your way to finding the perfect BMX bike for you.

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The Rider’s Height

In order to get the best sized BMX bike, you need to know the rider’s height. The rider’s height is the most important factor in determining what size BMX bike you need. Once you have the rider’s height, you can then use the charts below to find the right sized BMX bike.

How to Measure Your Height

To measure your height, stand against a wall and mark the highest point of your head with a pencil. Measure from the ground to the mark, making sure to keep the measuring tape perpendicular to the ground. If you don’t have a tape measure, you can use a ruler or yardstick. Just be sure to measure to the nearest inch or centimeter. Once you have your measurement, refer to our sizing chart below to find the right size BMX bike for you.

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The Rider’s Weight

BMX bike sizing is not an exact science, as there are many factors such as tire size, handlebar width and crank length that can affect how a bike feels to ride. However, the rider’s weight is the most important factor in determining what size BMX bike you need. Heavier riders will need a stronger and stiffer bike, while lighter riders can get away with a lighter and more flexible bike. Use the following chart to determine what size BMX bike you need based on your weight.

How to Measure Your Weight

If you are unsure of your bicycle size, simply measure your height and inseam and match it up to the appropriate frame size listed in the bike sizing chart below. If you fall in between two sizes, it’s generally better to go with the smaller size as it will be easier to make adjustments if needed.

For BMX racing, you will want a bike that is sized so that when you are sitting on the seat with both feet on the pedals (in the six o’clock position), your knees will have a slight bend when the pedals are at their lowest point. For vert riding or flatland tricks, you will want a bike that is sized so that when you stand over the top tube (with both feet flat on the ground), there is 1-2 inches of clearance between you and the tube.

Bike sizing charts are available at most bike shops and online retailers, but there can be some variation between brands. always double check before purchasing a new bike!

The Bike’s Frame

The first thing you need to know in order to determine what size BMX bike you need is the measurement of the bike’s frame. The frame is the part of the bike that the rider sits on, and it is also the part of the bike to which the wheels are attached. The frame is measured in terms of the length of the seat tube, which is the tube that runs from the seat to the pedals.

How to Measure a Bike’s Frame

To find out what size BMX bike you need, you will need to measure the frame. The frame is the part of the bike that the seat and handlebars attach to. To measure the frame, you will need to:
-Stand over the bike.
-Measure from the ground to the top of the frame at the point where the seat post meets the frame.
-If you are between sizes, it is better to choose the larger size.

The Wheel Size

You will need to know the size of the wheels on the BMX bike. The two most common sizes are 20-inch and 24-inch. If you are a beginner, you will probably want to get a 20-inch bike. They are easier to control and maneuver. If you are taller or more experienced, you may want to get a 24-inch bike.

How to Measure a Bike’s Wheel Size

Most BMX bikes today are made with 20″ wheels. Many BMX racing frames are made for 24″ wheels and some Dirt/Jump frames are made for 26″ wheels. You can put smaller wheels on a bike designed for larger wheels but you can’t put larger wheels on a bike not designed for them. That’s because the forks and frame tubes aren’t strong enough to handle the extra stress, and also because the brakes may not have enough clearance. The only exception is that you can put 24″ cruiser wheels on almost any frame, even if it wasn’t designed for them.

For general riding, 20″ is still the most popular size. But if you’re looking to get into BMX racing, or if you’re just a big rider, then you might want to consider a bike with 24″ or 26″ wheels.

To measure a bike’s wheel size, you will need:
-A tape measure
-A way to mark the measuring point (chalk, marker, etc.)

1) Find the spot on the ground where the tire touches when the wheel is at its lowest point in its rotation. This is your starting point.

2) Measure from this starting point to the top of the tire (or as high up as you can comfortably reach). Make sure to keep the tape measure perpendicular to the ground (at a 90 degree angle) or else your measurement will be inaccurate.

3) Mark this spot with your chosen method so that you can easily find it again. This will be your reference point moving forward.

4) Spin the wheel until you find the spot where it touches the ground again. Once you’ve found it, measure from your reference point to this new spot in the same way that you did before. This measurement is your wheel size.

Putting It All Together

There are a few things you need to consider when purchasing your first BMX bike. The first is wheel size. BMX bike wheel size is measured in inches and is typically between 20 and 26 inches. The next thing you need to take into account is the frame size. The frame size is the length of the top tube, which is the tube that goes from the handlebars to the seat. Most BMX bikes have a frame size of 20 or 21 inches. The last thing you need to consider is the crank length, which is the distance from the pedal to the bottom bracket. The crank length will usually be between 8 and 10 inches.

How to Use This Information to Choose the Right Size BMX Bike

Now that you know the three main measurements of a BMX bike, and how they can affect the feel and riding style of a bike, you can use that information to help you choose the right size bike for your riding.

There are two main ways to choose the right sized BMX bike. The first is to use the sized chart above, which will give you a general idea of what size bike you need based on your overall height. The second way is to actually measure your inseam, and then use that measurement to determine which size bike will give you the standover height you need.

If you are between sizes, or if you are larger or smaller than the average rider, it is best to go with the larger size bike. This gives you more room to grow into the bike, and also makes it easier to make small adjustments as needed.

It is important to remember that sizing charts are only a starting point, and that each rider is different. The best way to find the perfect fit is to go to your local BMX shop and ask for help from someone who knows BMX bikes. They will be able to help you find a bike that is not only the right size for your height, but also feels good when you ride it.