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Disc brakes use friction on a central rotor

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Hook: Squeezing the rim of a wheel with rubber pads is officially outdated. Explanation: Modern disc brakes mount a circular steel rotor to the wheel hub. When the rider squeezes the lever, calipers clamp down on this central disc rather than the tire rim, offering vastly superior stopping power even in absolute mud.

Disc brakes use friction on a central rotor
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