Custom Track Bike Frame Design and Heritage

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Robert Quirk, known for building everything from Transcontinental Divide race bicycles to trail-shredding dirt machines, has unveiled his first custom track bike featuring lo-pro pursuit frame geometry. This modern track bike pays homage to the early-90s era of velodrome legends Obree, Moser, and Indurain, who pioneered non-traditional riding positions that revolutionized competitive cycling.

This particular build holds special significance as it was commissioned by Jack, one of Quirk Cycles’ first customers who has now become a repeat client. Jack’s journey began with a simple request to add a wishbone stay to his vintage lo-pro frame, promising that he would return one day for a full custom commission. True to his word, Jack came back, igniting the creation of this modern interpretation of a classic pursuit machine designed for velodrome racing.

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The heritage behind this frame extends beyond mere nostalgia. The geometry and construction methods chosen reflect decades of evolution in pursuit cycling, where aerodynamics and power transfer take precedence over comfort. This specialized machine represents Quirk’s expansion into a highly technical discipline that demands precision in every measurement and weld.

Advanced Track Bike Construction Techniques

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The construction process for this frame presented unique challenges that required innovative fabrication solutions. Unlike traditional frame building sequences, Robert had to reverse-engineer the entire process, designing and fabricating the seat tube first to ensure proper clearance for the rear wheel. Only after establishing this critical dimension could the rear triangle be constructed, followed by the complex wishbone arrangement that defines this build’s distinctive character.

The technical execution involved tacking a section of 1-inch steel tubing precariously in place before brazing, then carefully adding the aerofoil section. This meticulous process resulted in a structure that combines strength, visual intrigue, and smoothness—qualities that wouldn’t look out of place in the engine bay of an Aston Martin DB9. The wishbone design serves both aesthetic and functional purposes, contributing to the frame’s overall structural integrity while maintaining the clean lines essential for reducing wind resistance.

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The reversed construction sequence demonstrates the complexity of building pursuit-specific frames. Each joint must be perfectly aligned to handle the extreme forces generated during explosive velodrome starts and sustained high-speed efforts. The brazing work requires exceptional skill to ensure that heat doesn’t compromise the steel frame’s integrity while achieving the smooth, flowing transitions between tubes that characterize professional-level builds.

Aerodynamic Track Bike Features and Materials

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The frame’s front triangle utilizes Columbus megatubes, chosen specifically to accentuate the fluid lines of the fins while providing the stiffness required for explosive fixed-gear efforts. These tubes represent some of the finest materials available in custom frame building, offering an optimal balance of weight, strength, and responsiveness that serious pursuit racers demand on the boards.

THANKS TO NIKOO HAMZAVI FOR THIS PHOTO

Cole Coatings Workshop contributed their expertise by creating custom aerofoils from thin steel sheet, which were then bonded to the edges of the tubes using flex-epoxy adhesive. This advanced bonding technique ensures seamless integration between components while maintaining the structural integrity needed to withstand the forces generated during high-speed pursuit racing. The aerofoil sections create a visual flow that emphasizes the machine’s speed-focused design philosophy while actually reducing drag coefficient.

The material choices reflect a careful balance between traditional craftsmanship and modern engineering. While carbon fiber dominates modern velodrome competition, this steel construction offers unique ride characteristics and durability that many riders still prefer. The flex-epoxy bonding represents an innovative approach to integrating aerodynamic elements without the weight penalty of additional brazing or welding.

Professional Track Bike Components

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The component selection reflects uncompromising performance standards. At the heart of the drivetrain sits a set of Shimano Dura-Ace cranks, renowned for their stiffness and reliability in competitive cycling. These cranksets transfer every watt of power directly to the fixed-gear system, essential for the explosive accelerations and sustained speeds demanded in pursuit competitions.

The wheelset combines modern and vintage elements perfectly suited to pursuit racing. A vintage ZIPP disc wheel at the rear provides the aerodynamic advantage crucial for cutting through the air at high speeds, while the 650c front wheel offers improved handling characteristics and reduced frontal area. The custom MAX forks feature a Samson track crown, specifically designed to handle the unique stresses of banked track bike racing while maintaining precise steering response needed when drafting or overtaking competitors.

The aggressive 22cm handlebar drop positioning demonstrates Jack’s commitment to achieving an authentic pursuit position. This extreme drop requires significant flexibility and core strength but allows the rider to achieve the low, aerodynamic position that was signature to the great pursuit specialists of the 1990s. The setup prioritizes aerodynamic efficiency over comfort, reflecting the uncompromising nature of pursuit racing where seconds matter more than comfort over the typical 4000-meter distance.

Track Bike Paint and Velodrome Performance

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The finishing touches elevate this track bike frame from mere racing equipment to functional art. Cole Coatings applied a pearlescent white paint scheme that shifts and shimmers under velodrome lights, creating a dynamic visual effect matching the bicycle’s performance capabilities. The shimmering blue accents pay tribute to two iconic velodrome machines: the Cinelli Laser and the Cannondale Track.

These design references connect this modern build to pursuit racing’s rich history. The Cinelli Laser revolutionized aerodynamic design in cycling, while the Cannondale became synonymous with American velodrome success. By incorporating visual elements from these legendary machines, Quirk Cycles created a frame that respects tradition while pushing forward with modern construction techniques.

The completed build represents a perfect synthesis of historical inspiration and contemporary craftsmanship. Every element, from the reverse-engineered construction process to the carefully selected components, serves the singular purpose of creating a machine capable of exceptional performance on the boards. The unique wishbone stays, aerodynamic tube profiles, and aggressive geometry all contribute to a frame purpose-built for the demands of pursuit racing at the highest level.

This Quirk Cycles creation demonstrates what’s possible when skilled builders tackle the specific challenges of lo-pro pursuit geometry. The combination of Columbus tubing, custom fabrication techniques, and thoughtful component selection has resulted in a track bike honoring the past while remaining thoroughly modern in execution. For Jack, this represents not just a custom bicycle, but the fulfillment of a vision that began with a simple wishbone modification and evolved into this stunning example of frame building artistry ready for velodrome competition.

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