Allroad Bicycle: The Hulsroy Design Philosophy

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The Origins of Hulsroy Cycles

This weeks Spotlight Bicycle of the Weeks is the Hulsroy Allroad Bicycle. Hulsroy Cycles emerged from the creative vision of Mads Hulsrøj Jæger, a Danish architect-turned-framebuilder whose bicycle design philosophy and cycling passion led him to discover metalwork and bicycle design during his architectural studies. After graduating in 2013, Jæger took an unconventional path by studying precision mechanics to hone his bicycle engineering and framebuilding techniques.

His journey into frame building and cycling innovation was shaped by principles of self-reliance and knowledge sharing within the cycling community. The brand’s philosophy centers on sustainable cycling and cycling craftsmanship, focusing on creating bespoke allroad bicycle designs that embody allroad bicycle durability over mass bicycle manufacturing.

Drawing from Danish design traditions and his architectural approach, Jæger has established a unique bicycle legacy in custom bike building.

The company’s cycling culture is captured in its mantra “KØRDØR” (meaning both “ride til you die” and “ride you buffoon”), inspired by a moment of cycling exploration at the top of the Pøt Mølle climb, which crystallized his dedication to the cycling lifestyle and adventure cycling as a way of life.

Custom Allroad Bicycle Frame Design

Fillet Brazed Construction with Premium Tubing

This handmade allroad bicycle frame showcases meticulous fillet brazing expertise on a steel frame bicycle, combining Columbus tubing (Zona/Spirit) and T45 bicycle tubing for optimal bicycle performance.

The frame construction features custom bike design elements, including a segmented fork that complements the bicycle frame geometry. This artisan bicycle construction method allows for precise control over bike frame materials while maintaining the structural integrity essential for all-terrain bicycle and mixed terrain cycling applications.

Precision Drivetrain Components

SRAM and Shimano Integration

The custom allroad bicycle components combine carefully selected SRAM and Shimano parts for bicycle reliability across varied terrain ideal for bicycle touring and bikepacking. The system centers around a SRAM Red Exogram crankset with GXP bottom bracket, paired with a SRAM Xsync 38T chainring.

The Shimano XT 11-42 cassette provides wide gear range, while the SRAM Rival 1 derailleur and SL-500 11-speed shifter ensure precise gear changes. This hybrid setup maximizes bicycle functionality while maintaining bicycle versatility.

Wheelset and Tire Configuration

650B Platform with Dynamo Power

The handcrafted bicycle utilizes 650B wheels from LightBicycle with 35mm width rims, optimized for gravel bike applications. The handbuilt wheels incorporate a dynamo hub for power generation, showcasing cycling technology integration. The allroad bicycle aesthetics are enhanced by the clean design of both wheels, fitted with Rene Herse Switchback Hill EL tires, selected for their balance of rolling efficiency and off-road capability.

Braking System Innovation

Hybrid TRP and Magura Solution

This touring bicycle’s braking system, developed through extensive bicycle expertise, combines TRP Hylex RS hydraulic brake levers with Magura MT8 flatmount calipers. The custom framebuilder’s approach to bicycle customization creates a hybrid setup that maximizes stopping power and modulation.

This bicycle innovation combines the ergonomics of the TRP levers with the proven performance of Magura’s lightweight MT8 calipers, ensuring bicycle sustainability across various conditions.

Custom Accessories and Lighting

Handcrafted Additions for Versatility

The allroad bicycle features purpose-built accessories embodying cycling engineering principles, including a custom-made front rack integrated with a B&M front light system and Son fender-mounted rear light. The cycling design extends to a made-to-measure baggage set from Witslingers, designed to work seamlessly with the bicycle frame construction. These cycling tradition-inspired accessories enhance the bicycle’s utility while maintaining its clean aesthetic and bicycle design principles.

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