Addcomposites Blog

A Carbon Bike Frame's Weakest Point Is the Joint, Not the Tube

A Czech Technical University team embedded fiber Bragg grating optical sensors inside the head tube joint of a composite bicycle frame, then rode it, tested it to failure, and modeled it. Real sprint loads exceeded every ISO load case, and the strain inside the joint beat the strain on the tube surface beside it. Our summary of the 2022 Applied Sciences study — and why we read it as a manufacturing problem.

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