PDW Gravity Plus USB Tail Light

PDW Gravity Plus USB Tail Light Portland Design Works

PDW Gravity Plus USB Tail Light

PDW Gravity Plus USB Tail Light

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What Makes the PDW Gravity Plus the Smartest Tail Light Available?

The PDW Gravity Plus USB Tail Light has a built-in accelerometer that actively monitors your speed and behavior while you ride. When the sensor detects braking or swerving, it automatically switches to a super-bright solid beam to alert following traffic before they realize you're slowing down. It's the closest thing to a brake light that a bike tail light has ever offered, and it runs on a USB-rechargeable battery that keeps the system maintenance-free.

Setup requires a simple calibration routine: install on your bike before powering on, then hold still for one second after pressing the power button to let the accelerometer zero itself. After that it works automatically every ride. The Gravity Plus is a meaningful upgrade over passive blinky lights for urban riders, commuters, and road cyclists who share lanes with fast-moving traffic and want an active layer of protection behind them.

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$38.99
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4 in stock

  • Orders over $100 ship free!
  • Estimated delivery: Apr 01 - Apr 05

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Specifications

  • Charging: USB rechargeable
  • Smart Feature: Built-in accelerometer detects braking and swerving
  • Auto Mode: Switches to solid beam on deceleration
  • Power: Hold button 1 second to turn on/off
  • Calibration: Install on bike before powering on, hold still 1 second after activation

FAQ

How does the accelerometer brake detection work?

The built-in sensor monitors your movement continuously. When it detects a rapid deceleration or sharp swerve, it immediately switches from flash mode to a solid bright beam to signal following traffic.

Why does it need calibration every ride?

The accelerometer needs a still reference point to understand what counts as movement. Installing it on the bike first and holding still for a second sets that baseline accurately.

Is USB charging included?

Yes, the Gravity Plus charges via USB. Exact cable type and runtime details are available in the product documentation.

Best For

Urban commuters and road cyclists who share lanes with vehicle traffic and want a smarter tail light that actively communicates braking behavior rather than just blinking indefinitely.

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