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Cannondale frame buckle under braking

The owner reports fitting a disk brake, riding about 50km, then fitting new brake pads and going for a ``hard braking'' test. The owner weighs about 175kg and has broken many components in normal riding, so he wore a full-face motorycycle helmet for the first ride. In sustained hard braking down a hill, he reports a ``crack'' sound, then it felt like the wheel jammed. The bike flipped and the rider broke both arms. In looking at the damage he suspects the frame buckled, allowing the front tire to move back and jam on the frame.

Although the combination of rider weight, suspension fork, and disk brake seems like it might be ``overload'', it is worth noting that

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Some suggestions/observations from other folks:


See also FAIL-018.html.