How To Build A Fat Tire Bike

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Fat tire bikes, also known as fat bikes or snow bikes, are a type of mountain bike that is designed for off-road riding on rough or uneven terrain. They are characterized by their wide, low-pressure tires, which provide increased traction and stability on loose or soft surfaces such as snow, sand, and mud.

Fat tire bikes are becoming increasingly popular among mountain bikers and outdoor enthusiasts due to their versatility and ability to tackle a wide range of terrain. In this article, we will guide you through the process of building your own fat tire bike, including choosing the right components and assembling the bike.

How To Build A Fat Tire Bike

Step 1: Choose Your Frame

The first step in building a fat tire bike is to choose the right frame. There are several factors to consider when selecting a frame, including size, material, and style.

Size: It is important to choose a frame that is the right size for your body. The size of the frame is typically determined by the length of the top tube, which is the horizontal tube that connects the seat tube to the head tube. To find the right size frame, you can use a bike size chart or measure your inseam and compare it to the size chart provided by the manufacturer.

Material: Fat tire bike frames are typically made from steel, aluminum, or carbon fiber. Steel frames are the most durable and can handle rough terrain, but they are also the heaviest. Aluminum frames are lighter and more responsive, but they are not as durable as steel. Carbon fiber frames are the lightest and offer the best performance, but they are also the most expensive.

Style: There are several styles of fat tire bike frames to choose from, including hardtail, full-suspension, and single-speed. Hardtail frames have a rigid rear end and a front suspension fork, while full-suspension frames have both a front and rear suspension. Single-speed frames are designed for use with a single-speed drivetrain and do not have gears.

Related: How Much Weight Can A Fat Tire Bike Hold?

Step 2: Choose Your Components

The next step in building a fat tire bike is to choose the right components. Some of the key components to consider include the wheels, tires, drivetrain, and brakes.

Wheels: Fat tire bikes typically have wider rims and hubs to accommodate the wide tires. Look for wheels with a high number of spokes, as they are stronger and more durable.

Tires: The tires on a fat tire bike are one of the most important components, as they determine the traction and stability of the bike. Fat tires have a wide width and a low air pressure, which allows them to conform to the shape of the terrain and provide increased traction. Look for tires with a high tread depth and a good balance of traction and rolling resistance.

Drivetrain: The drivetrain of a fat tire bike consists of the crankset, chain, derailleurs, and shifters. Choose a drivetrain that is compatible with the frame and has the right number of gears for your needs.

Brakes: The brakes on a fat tire bike should be able to provide strong and reliable stopping power, even in wet or muddy conditions. Look for brakes with large rotors and strong brake pads.

Step 3: Assemble the Bike

Once you have chosen all of your components, it is time to assemble the bike. Follow these steps to build your fat tire bike:

  1. Start by attaching the bottom bracket to the frame. This is the part of the bike that the crankset is attached to. Use a bottom bracket tool to install the bottom bracket into the frame.
  2. Next, attach the crankset to the bottom bracket. The crankset consists of the pedals, chainrings, and the spindle that connects them. Use a crank extractor tool to remove the old crankset, if necessary, and install the new one according to the manufacturer’s instructions.
  3. Install the front derailleur onto the frame. The front derailleur is responsible for shifting the chain between the front chainrings. Attach the derailleur to the frame using the appropriate mounting bolts and adjust the position of the derailleur so that it is aligned with the chainrings.
  4. Attach the rear derailleur to the frame. The rear derailleur is responsible for shifting the chain between the gears on the cassette. Attach the derailleur to the frame using the appropriate mounting bolts and adjust the position of the derailleur so that it is aligned with the cassette.
  5. Install the shifters onto the handlebars. The shifters are responsible for controlling the derailleurs and shifting the gears. Attach the shifters to the handlebars using the appropriate mounting brackets and adjust the position of the shifters so that they are comfortable to reach.
  6. Install the wheels onto the frame. First, attach the quick-release skewer to the hub of the wheel. Then, align the skewer with the dropouts on the frame and insert the skewer through the dropouts. Tighten the quick-release lever to secure the wheel in place.
  7. Install the handlebars onto the stem. The stem is the part of the bike that connects the handlebars to the fork. First, loosen the bolt on the stem and slide the handlebars into position. Then, tighten the bolt to secure the handlebars in place.
  8. Attach the pedals to the crankset. The pedals thread onto the spindle of the crankset. Use a pedal wrench to thread the pedals onto the spindle and tighten them in place.
  9. Adjust the derailleurs and shifters. Shift through all of the gears to ensure that the derailleurs and shifters are properly adjusted and functioning correctly. Make any necessary adjustments using the barrel adjusters on the derailleurs and shifters.
  10. Check all of the bolts and components to ensure that they are tightened properly. Make any necessary adjustments using a torque wrench to ensure that the bike is safe and ready to ride.


Building your own fat tire bike can be a rewarding and exciting project. By following these steps and choosing the right components, you can create a bike that is tailored to your needs and ready to tackle any terrain. Don’t be afraid to ask for help or seek guidance from a bike shop or online community if you have any questions or concerns during the process. Happy building!

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