Parts Of A Mountain Bike – Complete Mountain Bike Anatomy


From the frame to the drivetrain, learning about the parts of the mountain bike is key to being a better rider. It will be easier to understand how to mountain bike, including the fundamental skills and techniques, if you have a solid understanding of the bike’s parts. 

Want to learn more about mountain bike anatomy? Keep on reading and we’ll talk about the most important components of a mountain bike

What are the Parts of a Mountain Bike? 

The parts of the mountain bike include the frame, fork, wheels, saddle, handlebar, pedals, chains, gears, suspension, and cranks. A mountain bike has both static and moving parts, which will work together to help you conquer the trails. 

Below, we’ll talk more about these parts and what they can do to a mountain bike. 

  • Frame 

Whether it is on a road bike, touring bike, mountain bike, or any other type of bike, the frame is arguably the most important part. This will have a huge impact on the overall performance, design, price, and durability of the bike, among other things. The frame is the backbone of your mountain bike and it is what holds the other parts together. 

Aluminum is the most common frame material that you will see in many bikes today, which is known for being lightweight. If you are looking for a cheaper material, on the other hand, go for steel. It is heavier, but it is also more forgiving, which will make it more comfortable. If budget is not an issue, then you should go for carbon fiber, which is almost exclusively found in mountain bikes used by the pros. 

  • Fork 

It is a two-legged part that is found in front of the frame. It is a crucial part of unlocking the full performance of a mountain bike. It might seem like a simple tube that connects the top and bottom parts of the bike, but it does more than such. 

Mountain bikes have two main types of forks. The first is a rigid fork, which means that it is stationary. It has two metal supports that lock the wheel in a single position without travel. It is common in a hardtail mountain bike

In contrast, a suspension fork is one that moves. It has one or two hydraulic shock absorbers, which will allow the wheel to travel along with the fork. This dynamic movement is the best benefit of a suspension fork, which means that it will do a great job in terms of impact absorption. The result is that it absorbs the vibration instead of passing it to your body, which is especially important if you are riding on rough terrains. 

  • Wheels

Listing the parts of a mountain bike will be incomplete without mentioning the wheels. It is the part of the bike that will keep you moving and also has a huge part to play in ensuring your comfort. The mountain bike wheels will also help improve your stability. 


This is the part that holds the tires. One of the most important for the rim is its width, which will affect control and stability. Aluminum rims are common in entry-level or beginner mountain bikes. On the other hand, more advanced models use carbon fiber. 


It is the part that you will find at the center of the wheel. It provides the axis of rotation. Depending on whether it is in front or at the rear, it is connected to the components of the mountain bike, such as the cassette. 


The spokes serve as the connection between the rim and the hub. The number of spokes will vary. The more spokes there are, the stronger the wheels will be. However, this isn’t always a good thing since it also translates into added weight. 


This is the nut in the wheel where the spokes are attached. It is often too small for most people to notice every day. Nonetheless, the nipples are important because they will help you to tune the wheel and make it straighter as it spins. 

  • Tires 

The mountain bike tires are also among the most important parts of a mountain bike. They are the ones that get in direct contact with the terrain so they should be matched to the condition of the ground where you will be going out for a ride.

For most mountain bikes, the outer tread of the tire is commonly made of rubber or polyurethane. The hardness is measured on a durometer scale. The harder the material is, the more durable it is. This also means that it will be less responsive. Underneath the tread, there is a second layer. And at the bottom, there is a bead material. The latter is usually made of aramid or carbon fiber. 

Aside from the material, the tread patterns are also important. This will affect the traction of the mountain bike. It will dictate how strong the tires will cling to the surface. 

  • Seat 

The seat is important for your comfort and support when on the trail, especially on uneven terrains. It would be best to choose one that comes with an adjustable seat, which means that you will be able to customize the bike seat height depending on your inseam or what you find to be most comfortable. 


The MTB saddle is where you will be directly sitting. It should be cushioned for your comfort. The padding helps in absorbing impact from the terrains, which will make it easier to sustain long rides. The size of the saddle is also important, which should match the needs of the user. 

Seat Post 

As noted earlier, you should look for a seat post that comes with a customizable height. This way, you can easily personalize how the bike fits the rider. The diameter will range from 27.2mm to 34.9mm depending on the frame. The material is similar to what is used in the frame and fork, which can include aluminum, steel, and carbon fiber. 


This is the part that will secure the seat of the mountain bike. It is considered by many to be an unsung hero as it is often forgotten when talking about mountain bike anatomy. It is a circular collar that will prevent the seat from rotating or sinking, especially when you are moving aggressively. 

  • Groupset / Drivetrain 

The groupset or drivetrain is a technical term that encompasses the heart of the bike. This is the engine that powers the bike. It consists of several moving parts that are crucial in the overall performance of the mountain bike. 


This is where the pedals are attached. It is one of the parts of a mountain bike that moves as you cycle. The axle, chainrings, and crank arms are the most common parts of the crankset. The number of chainrings in the crankset will determine how many gears a bike can handle. 

Bottom Bracket 

It is what attaches the frame of the mountain bike to the crankset. It can be threaded or pressed, the design of which will vary depending on the type of the frame of the mountain bike. 


The cassette is a collective term that refers to the rear gear set or sprockets. It is connected to the rear wheel. The number of rings will be indicative of the number of gears of the bike. 


It serves as the connection between the rear cassette and the front crankset. This is the drive of the mountain bike. It has interconnected links that will rotate as the bike moves. In most bikes, steel is a common material for the cassette. 


This is the part that guides the movement of the chain along with the cogs. There is a cable that pulls it in one direction and a spring tension will bring it in the opposite direction. 


Located in the handlebar, this will dictate the gear changes in the mountain bike. It is connected to the derailleur through a mechanic cable. In most mountain bikes, you will find a trigger shifter. It uses your thumbs or forefingers to initiate the gear change. 


It is a traditional part of the groupset, although, in recent years, it is considered a part of its own. This will dictate the stopping power of the bike, which will be crucial for your safety. The MTB brakes use friction to stop the bike. In most modern models, the standard is a hydraulic disc brake. It is a revolution because it eliminates reliance on cables and obsolete pads for braking. 

  • Pedals 

The mountain bike pedals are where you place your feet when you are on the trail. This is what you will rotate so that the bike will move. It powers the other parts of the bike, such as the chains and the wheels. 

With mountain bike flat pedals, there is a platform for each foot to rest. The pedals are double-sided, so they will work regardless of which side is up. It has good traction, making sure that your feet will stay in place. For beginners, we recommend choosing a bigger platform. 

Another type is a clipless pedal. They will clip to cleats that are mounted on your MTB shoes. A lot of riders prefer this because it is secure, minimizing the chances that your feet will slip off the pedal. 

  • Handlebar 

The MTB handlebars are where your hands will be throughout the ride. The design and overall construction will have an impact on the way you maneuver the bike. This is what you will use to steer the front wheel. It also influences your comfort, especially in terms of how your hands will wrap around the grips. 

The rise and sweep are two of the most important things in the handlebar of a mountain bike. It is also what makes it different from other types of bikes. The diameter, width, and materials are also important considerations. Aluminum alloy, titanium, and carbon fiber are some of the most common materials. 


To complete the handlebar, the MTB grips are important. This is the part that directly gets in contact with your hand. It is the rubber that is fastened to the handlebar for you to hold on. It often comes with a lock-on design, which secures to the handlebar using clamps. 

Lever and Shifter 

The levers and shifters are also attached to the handlebar. They are often found on the left side. They are important in controlling the bike, such as when it comes to engaging the brakes and shifting gears depending on the conditions of the terrain. 



Q: What are the parts on a bike called?


The main parts of a bike are called a frame, wheels, seat, handlebar, and its components. “Components” is a collective term that refers to the moving mechanical parts of a bike, which include cranks, brake levers, cassette, and front and rear derailleurs, among others.

Q: How do I identify my mountain bike?


To identify your mountain bike, look at the serial number. This is a unique set of numbers, which will make you sure that the bike is yours. You can find your bike’s serial number on the bottom bracket. In some models, the serial number in a mountain bike is on the head tube.

Q: Where can I find bike parts?


You can find bike parts online and offline. Some people prefer buying bike parts in online shops because it is convenient. On the other hand, other riders prefer to buy bike parts in physical stores where they can see the actual part and test the quality before purchasing.

Globo Surf Overview 

Every rider must be aware of the mountain bike anatomy. It is only through an understanding of the parts that you will know how they function. This will give you a better knowledge of the contribution of each component to the overall ride experience and performance of the mountain bike.

Globo Surf
My name is David Hamburg. I am an avid water sports fan who enjoys paddle boarding, surfing, scuba diving, and kite surfing. Anything with a board or chance I can get in the water I love! I am such a big fan I decided to start this website to review all my favorite products and some others. Hope you enjoy!