How Disc Brakes Slow a Bicycle

Trace braking force from the lever to the caliper, rotor and tire contact patch. Friction turns motion into heat, while grip and weight transfer determine how effectively the bicycle slows. Inside this episode: - The brake does not push on the ground - Leverage at the handlebar - Friction creates torque - Kinetic energy becomes heat - Why brakes can fade Sources include ISO 4210-4:2023 summary, bicycle braking test methods, Thermal analysis of bicycle disc brakes, and Thermal analysis and ISO braking framework. This episode is a researched narrative summary. Historical records may be incomplete, translated differently, or interpreted differently by scholars. We distinguish documented facts, estimates, disputed interpretations, and later stories where material. Corrections are logged and incorporated into future editions. Follow Cycling Beyond the Pedals for more researched stories about the engineering and strategy of cycling.