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Will Next-Gen Specialized Roubaix Feature Angled Strut For Extra Vertical Compliance?

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Thursday, Feb 16

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Specialized’s latest published patent documents a “Bicycle Frame with Angled Strut”, wherein a completely new frame tube – an ovalized strut connecting seat & down tubes – appears designed to deliver increased vertical flex compared to a conventional bicycle frame design with a continuous seat tube. This unusual design implies impacts for frame weight, ride comfort, and tire clearance, too, possibly giving us some insights into what a next generation of Specialized’s Spring Classics road racing bike, all-road, or even gravel bike might look like… Specialized Patent for Bicycle Frame with Angled Strut

The bicycle frame outlined in this European patent from Specialized (EP4122807A1) does away with a continuous seat tube, replacing it with a sort of floating one, if you will, suspended by a portion of ovalized frame tubing that connects it to the downtube around a third of the way up the latter’s length ( 58 ). No more traditional frame triangles in this bike… might we refer to the front polygon & rear trapezoid in the future?

The patent claims that these modifications advantageously reduce the vertical stiffness of the bicycle while substantially maintaining or reducing to a lesser extent the horizontal ( e.g., lateral or torsional ) stiffness of the bicycle, thereby increasing the comfort for the rider while substantially maintaining or only slightly reducing the handling of the bicycle and/or force transfer of the rider to the bicycle. Cross-sectional […]

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