The HD-E350 is Tektro's e-bike-specific hydraulic brake: strong, consistent, and fitted with a motor-inhibitor switch so power cuts the instant you brake. It's the brake on a huge number of factory e-bikes because it delivers real hydraulic stopping at a sane price.
For a heavier e-bike, hydraulic discs aren't a luxury — they're a safety necessity. Upgrading mechanical discs to the HD-E350 (with a larger rotor up front) transforms stopping power on a loaded or fast bike.
Where to buy
Two paths — match your spend to the build. Quality picks last longer and come with real support; affordable picks get you rolling for less. Always confirm fitment, voltage, and connectors for your bike first.
Quality picks
Affordable picks
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Pro tips from our test team
- Run a bigger front rotor (180–203mm) for heavier or faster bikes.
- The motor-cutoff switch is a real safety feature — keep it wired in.
- Bed in new pads and rotors before relying on full stopping power.
