WTB has unveiled a trio of high-volume gravel tyres—Byway RS 50, Course 52, and Macro 54—designed to revolutionize gravel cycling performance. Developed in collaboration with Stromm, renowned for crafting the world’s fastest UCI-legal road bike, these tyres incorporate innovative aerodynamic features aimed at reducing drag and enhancing speed. (bikeworldnews.com)
Aerodynamic Advancements
The new tyres feature sidewall vortex generators and trip strips, technologies that manipulate airflow to minimize low-pressure wake and reduce drag. Field testing at a velodrome demonstrated significant aerodynamic benefits, with savings of 5.8 watts at 30 km/h, 9.3 watts at 35 km/h, and 13.8 watts at 40 km/h compared to a control tyre. (escapecollective.com)
Optimized Construction
Each tyre is built around a 120 TPI casing with bead-to-bead SG2 puncture protection, ensuring a supple yet stable ride. The Dual DNA rubber compound features a low-drag centre for reduced rolling resistance and high-friction shoulder lugs for enhanced grip during cornering. These tyres are optimized for modern 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 50: Designed for speed on hardpack gravel and tarmac, this tyre features a slick central tread with low-profile side knobs. Claimed weight is 620g. (bikeworldnews.com)
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Course 52: An all-rounder tyre with a shallow central tread for rolling efficiency, suitable for varied off-road conditions. Claimed weight is 635g. (bikeworldnews.com)
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Macro 54: Tailored for rougher surfaces, this tyre boasts a more aggressive, widely spaced tread pattern. Claimed weight is 640g. (bikeworldnews.com)
All three models are available with black or tan sidewalls and are priced at $89.95. These tyres represent a significant advancement in gravel cycling, combining aerodynamics with durability to meet the demands of modern gravel riders.