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  1. How E-Bike Disc Brakes Work

    The parts of a bicycle disc brake, from lever to rotor, and what each one does when you squeeze the lever.

  2. Hydraulic and Mechanical Disc Brakes Compared

    How cable (mechanical) and fluid (hydraulic) disc brakes differ, and a simple way to tell which kind your e-bike has.

  3. How to Tell When Brake Pads Are Worn

    Signs that disc brake pads are worn or contaminated, the general thickness guide from Park Tool, and why your own maker's figure comes first.

  4. Organic, Sintered and Other Brake Pad Types

    What makers say about organic, sintered (metallic) and semi-metallic disc brake pads, and why switching types can mean a new rotor.

  5. Bedding In New Pads and Rotors

    What bedding in means, why makers ask for it after new pads or rotors, and where to find the steps for your own brake.

  6. Rotor Wear and Minimum Thickness

    How a worn disc brake rotor is spotted, what Park Tool says about measuring it, and why the maker's own minimum figure decides when to replace it.

  7. Rotor Sizes and Mounting Types

    What rotor diameter means, the common bicycle rotor sizes, and how six-bolt and Center Lock mounts differ.

  8. Why Disc Brakes Squeal and How Makers Say to Clean Them

    Common causes of disc brake squeal and contamination, with what Park Tool, SRAM and iFixit say, and why your own maker's manual comes first.