What Is the Best BMX Gear Ratio? (Read This First)

What Is the Best BMX Gear Ratio

Your choice of gear ratio has a long way to go in determining your BMX bike’s speed,  performance, and lots more. 

Whether you are a casual rider or an expert racer, it’s important to understand the gear ratios and choose the perfect one for your riding experience. 

However, BMX bikes come in different models with just one gear that differs in every model. So, understanding the gear ratio and choosing the best can be very challenging. 

Choosing the best BMX gear ratio depends on your choice and riding manner. The most common gear ratio in modern BMX is 25.9, with a gear inch of about 54.17, and the second most popular gearing is 28.9, with a gear inch of 62.2. These gear ratios provide a balanced acceleration.

This article will dive deep into various factors that influence gear ratio selection and some principles that will guide you in choosing what’s best for you. 

Ultimately,  you can choose the best gear ratio that fits your preference. 

Which BMX Gear Ratio is the Best?

What Is the Best BMX Gear Ratio

It’s a good decision to want to know the best gear ratio for your BMX. After all, who doesn’t like the best? However, there is no certain answer regarding the best gear ratio for a BMX.  

The best gear ratio depends on various factors, including your riding style, terrain, skill level, and personal choices. 

Here are some factors you need to consider when determining the gear ratio that suits you best:

#1. Riding Style

This factor is very important when choosing a BMX gear ratio. If you like to perform tricks, jumps, and stunts, a lower gear ratio of  2.25 to 2.3 is more suitable. 

This gear ratio provides faster rotations and responses, which is vital for performing technical maneuvers. 

On the other hand, if you have more interest in racing, a slightly higher ratio of 2.4 to 2.5 could help you maintain speed on roads and generate power for the race.

#2. Terrain

Consider the type of road you will be riding more frequently. Opting for a lower gear ratio is best if you drive through narrow, technical spaces such as skate parks or street obstacles. 

Doing so will make maneuverability and speed quickly out of tight corners easier. 

However, if you are riding on smoother roads or longer distances, a higher gear ratio might be the best option for maintaining speed and covering greater distances efficiently.

#3. Skill Level 

The level of your skill is another factor to consider in gear selection. As a beginner, a lower gear ratio is more helpful since it’s easier to control and offers quicker movements. 

As your skills improve and you are more comfortable handling your bike, you can try a higher gear ratio to challenge yourself and test higher speeds. 

#4. Personal Strength and Fitness

 Your physical stability and fitness level influence your ability to ride effectively with various gear ratios.

A lower gear ratio requires less effort to operate, which can be helpful if you are still building your strength. 

But, if you have more experience as a rider with greater power output, a higher gear ratio might be more suitable to maximize your top speed.

#5. Track Design

If you are into BMX racing, the design of the track is important. Tracks with longer straight sections may favor a higher gear ratio to maintain speed. 

In comparison, tracks with many twists and turns might make using a lower gear ratio necessary for quick movements out of corners. 

Adapting your great ratio to the exact track layout can give you an advantage.

#6. Experimentation and Adaptation 

Finding the best gear ratio involves experimenting and adaptation. It’s advisable to test different gear ratios to know how they feel while riding. 

Do not fear to switch between various ratios to determine their effect on your performance and comfort. 

With time, you will better understand which gear ratio suits your strengths and goals and choose the best for your BMX. 

#7. Wheel Size and Gearing System

The size of your BMX bike wheels and your gearing system also influence your effective gear ratio. 

Smaller wheels can influence the overall gearing, affecting how much distance you will cover per pedal cycle. 

That is why you should ensure your chosen gear ratio matches your bike’s wheel size and gearing system.

What is the Average Gear Ratio for a BMX Bike? 

The average gear ratio for a BMX bike is within the range of 2.25 to 2.5. This ratio number signifies the number of times the back wheel spins for every full rotation of the pedals. 

BMX bikes are mainly for short bursts of speed and fast acceleration. Thus, this bike often has lower gear ratios than other bicycle types.

This gearing arrangement allows riders to create power for tricks easily, jumps, and fast movements commonly performed in BMX riding.

The choice of gear ratio depends on the rider’s preference and the riding you are engaging in. Lower gear ratios, closer to 2.25, provide more rotation and make it easier to go from a standstill. 

This ratio is useful for tricks and jumps that need swift bursts of power. Furthermore, a higher gear ratio, closer to 2.5, will have lesser torque but a high-end speed. 

Therefore if you have concerns about racing or covering longer distances, it’s best to choose a slightly higher gear ratio to regulate speed in motion.

It’s important to note that BMX bikes come in different sizes and styles, and the gear ratio can differ depending on the model and purpose of the bike. 

Freestyle BMX bikes, made for tricks and stunts in skate parks or on street obstacles, usually have lower gear ratios for improved control and acceleration. 

Racing BMX bikes designed for speeding around tracks might have slightly higher gear ratios to attain full speed on straight sections.

What Bike Gear Ratio is Best for Speed? 

There is no fixed gear ratio for speed since the gear ratio best for your bike’s speed depends on various factors, such as the terrain you ride, your strength and fitness, and how fast you ride. 

However, a higher gear ratio will give you higher speed, but you must maintain a consistent rhythm while minimizing the strain on your muscles. 

Here are some principles to consider when choosing the best bike gear ratio for the speed you have in mind

  • When riding on a balanced or slightly hilly road, choosing a higher gear ratio is best. Doing so will enable you to ride at a higher cadence without getting tired. 
  • Also, if you pedal your bike in a mountainous or rocky area, choose a lower gear ratio. It will enable you to ride at a lower acceleration when going up and down the hills. 
  • Going for a lower gear ratio when driving down hills may be helpful. Doing so will prevent you from overspending on a sloppy hill. 

The table below shows the various gear ratios and the corresponding speed:

Gear RatioFront Chainring Rear CogSpeed
53.155315Average to high
50.145014Average to high
36.253625Low to Average 

If you are only concerned with using higher gear ratios for your speed, you might disregard the importance of maintaining a balance in the cadence. 

Cadence measured in revolution per minute (RPM) shows the rider’s acceleration. Maintaining a steady cadence in a comfortable range (80-100 RPM) is crucial for smooth rides. 

It’s important to note that modern drive trains have many gear ratio options, allowing you to navigate various terrains with your bike. 

Advanced technology introduces an electronic shifting system that allows you to adapt to different terrains without interrupting the speed. 

So, it’s up to you to try different ratios and see the best fit for your needs and capabilities. 

Does the Gear Ratio Affect a BMX’s Overall Performance?

The gear ratio significantly affects your BMX’s overall performance. The gear ratio includes the total number of teeth in the front chain ring and the rear cog. 

The ratio directly affects the distance of the bike covered with every pedal rotation, which in turn influences the acceleration and the ability to handle different terrains and stunts. 

A higher gear ratio with a bigger front chainring and a smaller back cog allows you to move at more speed every time you pedal your bike. 

However, this setup makes it difficult for BMX riders to control the speed and maneuvering. 

Also, the lower gear ratio, which includes smaller front chainring and bigger back cogs, allows BMX riders to gain better acceleration and control. 

It makes generating more torque with each pedal stroke easier, giving you easier navigation through obstacles.

Josh Matthews

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