In September 2026, WTB unveiled a trio of high-volume gravel tires—Byway RS, Course, and Macro—developed in collaboration with Stromm, the creators of the world’s fastest UCI-legal road bike. These tires, ranging from 50mm to 54mm in width, are engineered to enhance aerodynamics and performance across diverse gravel terrains. (bikeradar.com)
Aerodynamic Innovations
The Byway RS, Course, and Macro models incorporate strategically placed vortex generators and trip strips along their sidewalls. These features manipulate airflow over the tire and wheel, reducing drag and improving overall efficiency. WTB claims that these aerodynamic enhancements can save up to 14 watts at higher speeds, making them among the fastest gravel tires available. (bikerumor.com)
Design and Construction
Each tire is built with a 120 TPI casing and SG2 puncture protection, ensuring durability and reliability. The Dual DNA rubber compound features a harder center for reduced rolling resistance and a softer shoulder for increased grip. These tires are optimized for wide gravel rims with internal widths ranging from 25mm to 32mm, with a 28mm internal width being ideal. (bikerumor.com)
Model Specifications
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Byway RS (50mm): Designed for speed, featuring a slick center tread for low rolling resistance and micro-knobs on the shoulders for cornering control.
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Course (52mm): Offers a balance between speed and traction, suitable for a variety of gravel surfaces.
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Macro (54mm): Provides maximum grip and stability, ideal for loose and uneven terrains.
All models are available in Standard or Tan color options, with the Tan variant being approximately 10 grams lighter. Each tire is priced at $89.95 and is available through WTB dealers. (bikepacking.com)
For more information on these new tires, visit WTB’s official website.