Building your own fixie (fixed-gear bicycle) is a rewarding experience that allows for complete customization and a deep understanding of your ride. This guide will walk you through the process, from selecting components to final assembly and adjustments. Whether you're a seasoned mechanic or a complete beginner, we'll cover everything you need to know.
Choosing Your Fixie Components: The Foundation of Your Build
Before you even think about wrenches, you need the right parts. This is where you can truly personalize your fixie.
1. The Frame: The Heart of Your Fixie
The frame dictates the geometry and overall feel of your bike. Consider these factors:
- Material: Steel (chromoly is popular for its strength and durability), aluminum (lighter but can be harsher on rough roads), and carbon fiber (expensive but incredibly light and stiff) are common choices.
- Geometry: Different geometries impact handling and riding position. Research different frame geometries (e.g., track geometry, more relaxed geometry) to find what suits your riding style.
- Size: Proper frame size is crucial for comfort and efficiency. Use a bike fit calculator or consult a bike shop to determine the correct size for your height and inseam.
2. The Groupset: Drivetrain Essentials
For a fixie, your groupset is simpler than a geared bike, but still vital:
- Cranks: Choose cranks based on your desired chainring size (smaller rings are easier to pedal, larger rings provide more speed). Consider crank arm length for optimal leg extension.
- Bottom Bracket: This connects your cranks to the frame. Ensure compatibility with your chosen crankset and frame.
- Chainring: The single chainring is your only gear. Select a size appropriate for your riding terrain and fitness level.
- Chain: A robust, well-lubricated chain is crucial for smooth pedaling. Choose a chain compatible with your chosen chainring and freewheel/fixed cog.
- Freewheel/Fixed Cog: This is unique to fixies. A fixed cog means your pedals always rotate with the wheels – ideal for track riding. A freewheel allows coasting. Many builds utilize a flip-flop hub, allowing easy switching between fixed and freewheel.
3. Wheels: Rolling Smoothly
- Rims: Aluminum is a popular and affordable choice. Carbon fiber offers lightness and stiffness but comes at a higher price. Consider rim depth for aerodynamics.
- Hubs: Choose hubs with the correct axle type for your frame and desired freewheel/fixed cog configuration. Many fixies use flip-flop hubs for versatility.
- Spokes: Spoke count varies (32, 36 are common). Higher spoke counts often offer increased strength and durability.
- Tires: Choose tires based on your riding conditions. Thicker tires offer better comfort on rough surfaces, while thinner tires are faster on smooth surfaces.
4. Other Essential Components:
- Handlebars: Consider drop bars (for a classic road look) or bullhorn bars (for a more aggressive posture).
- Stem: Connects your handlebars to the steerer tube. Choose a stem length for optimal reach and comfort.
- Seatpost: Supports your saddle. Make sure it's the correct diameter for your frame.
- Saddle: Comfort is key! Choose a saddle that fits your body shape and riding style.
- Brakes: Fixies often have only a front brake (though some riders choose to forgo brakes altogether, it's highly discouraged). Choose brakes appropriate for your riding style and local regulations.
- Pedals: Choose pedals compatible with your shoes (toe clips and straps or clipless pedals).
Assembling Your Fixie: Step-by-Step
This section provides a general overview. Refer to specific component manuals for detailed instructions.
- Install the Bottom Bracket: This is often the first step, requiring precise fitting and tightening.
- Attach the Cranks: Ensure proper alignment and torque.
- Install the Wheels: Ensure the wheels are properly seated and trued.
- Install the Chain: Proper chain tension is critical for a fixie's performance.
- Assemble the Handlebar and Stem: Tighten securely to prevent movement.
- Attach the Seatpost and Saddle: Ensure the seatpost is inserted to the correct height and clamped securely.
- Install the Brakes (if applicable): Proper brake adjustment is essential for safety.
Fine-Tuning and Adjustments: Getting Your Fixie Ready to Ride
Once assembled, you may need to fine-tune your fixie. This includes:
- Chain Tension: Adjust the chain tension to ensure smooth pedaling and prevent chain slippage.
- Brake Adjustment: Ensure the brakes engage properly and offer sufficient stopping power.
- Wheel Truing: If your wheels are not true (wobbly), you may need to true them (requires specialized tools).
Conclusion: Ride On!
Building your own fixie is a challenging but ultimately rewarding endeavor. With careful planning, attention to detail, and a bit of patience, you can create a custom ride that's perfectly tailored to your needs and style. Remember to always prioritize safety and consult with experienced mechanics if needed. Happy riding!
