---
product_id: 364539921
title: "BikeSpark Auto-Sensing Rear Light G4R for Cargo Carrier - 50lm Superbright Bike Taillight with Large Reflector – Li-Polymer Rechargeable – IPX6-50/80mm Quick Mount/Snap to Release - Made in Taiwan"
brand: "bikespark"
price: "4642464₫"
currency: VND
in_stock: true
reviews_count: 6
url: https://www.desertcart.vn/products/364539921-bikespark-auto-sensing-rear-light-g4r-for-cargo-carrier-50lm
store_origin: VN
region: Vietnam
---

# Li-Polymer rechargeable battery 50 lumens ultra-bright output IPX6 water-resistant rating BikeSpark Auto-Sensing Rear Light G4R for Cargo Carrier - 50lm Superbright Bike Taillight with Large Reflector – Li-Polymer Rechargeable – IPX6-50/80mm Quick Mount/Snap to Release - Made in Taiwan

**Brand:** bikespark
**Price:** 4642464₫
**Availability:** ✅ In Stock

## Summary

> 🚴‍♂️ Light up your ride, stay ahead of the pack!

## Quick Answers

- **What is this?** BikeSpark Auto-Sensing Rear Light G4R for Cargo Carrier - 50lm Superbright Bike Taillight with Large Reflector – Li-Polymer Rechargeable – IPX6-50/80mm Quick Mount/Snap to Release - Made in Taiwan by bikespark
- **How much does it cost?** 4642464₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/364539921-bikespark-auto-sensing-rear-light-g4r-for-cargo-carrier-50lm)

## Best For

- bikespark enthusiasts

## Why This Product

- Trusted bikespark brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Quick Snap Mounting:** Tool-free 50/80mm quick mount and snap-release system for instant setup and removal.
- • **Wide-Angle Visibility:** 220° beam with super bright LEDs ensures you're seen from every angle, day or night.
- • **Effortless Auto ON/OFF:** Motion-activated light saves battery and hassle—never forget to turn it off again.
- • **Smart Deceleration Sensing:** Auto-brightens for 2.5s on braking, patented Vsenx tech boosts your safety game.
- • **Regulation-Ready Brightness:** ISO 6742 & Germany StVZO compliant lighting modes keep you street-legal and safe.

## Overview

The BikeSpark Auto-Sensing Rear Light G4R is a premium, rechargeable bike taillight featuring patented deceleration sensing technology that boosts brightness instantly when braking. With 50 lumens output, 220° visibility, IPX6 water resistance, and quick snap mounting, it offers professional-grade safety and convenience for urban and cargo cyclists alike.

## Description



## Features

- Upgrade Your Reflector to BKS-G4R Now! - BikeSpark’s Auto-Sensing Rear Lights detect bike deceleration with an innovative deceleration sensing algorithm, Vsenx (US Patent No.: 10427594 B2). Once deceleration is detected, BikeSpark increases the brightness to ultrabright for 2.5 seconds, alerting and improving the reaction time of the person in any vehicle traveling behind.
- Automatic ON/OFF - Press the Control Button to turn on the light and you are good to go. Never have to remember to turn off your rear light again! BikeSpark turns off automatically after 1 minute of inactivity, and turns on when motion is detected. The perfect balance of convenience, battery life and riding safety.
- Great Brightness meeting Regulatory Compliance - Super bright LEDs provide excellent long distance and 220 degree visibility, up to 50 lm with low power consumption. Besides, two constantly-on lighting modes meet ISO 6742 1/3/5, and Germany StVZO Regulations help you riding safely in the darkest nights.
- Made in Taiwan / Quick Mounting / Snap to Release / 4 Lighting Modes / Li-polymer Rechargeable / IPX6 Water Resistance / Low Battery Indicator / Upgrade Your Reflector to BKS-G4R Now!
- International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Color | Red, Black |
| Material type | Aluminium Polypropylene Polyvinyl Chloride |
| Power source | Battery Powered |
| Batteries included? | Yes |
| Brand | BikeSpark |
| Item model number | AQ-6OW2-VCVP |
| Product Dimensions | 10.8 x 4 x 3.3 cm; 80 g |
| ASIN | B0991V426W |

## Product Details

- **Colour:** Red, Black
- **Brand:** BikeSpark
- **Material:** Aluminium Polypropylene Polyvinyl Chloride
- **Power source:** Battery Powered
- **Water resistance level:** Waterproof
- **Item weight:** 0.08 Kilograms
- **Mounting type:** Rack Mount
- **Product dimensions:** 10.8L x 4W x 3.3H centimetres
- **Number of settings:** 4
- **Brightness:** 50 Lumen

## Images

![BikeSpark Auto-Sensing Rear Light G4R for Cargo Carrier - 50lm Superbright Bike Taillight with Large Reflector – Li-Polymer Rechargeable – IPX6-50/80mm Quick Mount/Snap to Release - Made in Taiwan - Image 1](https://m.media-amazon.com/images/I/71onBMCdx7L.jpg)
![BikeSpark Auto-Sensing Rear Light G4R for Cargo Carrier - 50lm Superbright Bike Taillight with Large Reflector – Li-Polymer Rechargeable – IPX6-50/80mm Quick Mount/Snap to Release - Made in Taiwan - Image 2](https://m.media-amazon.com/images/I/715VMiau+OL.jpg)
![BikeSpark Auto-Sensing Rear Light G4R for Cargo Carrier - 50lm Superbright Bike Taillight with Large Reflector – Li-Polymer Rechargeable – IPX6-50/80mm Quick Mount/Snap to Release - Made in Taiwan - Image 3](https://m.media-amazon.com/images/I/81JM3msHxYL.jpg)
![BikeSpark Auto-Sensing Rear Light G4R for Cargo Carrier - 50lm Superbright Bike Taillight with Large Reflector – Li-Polymer Rechargeable – IPX6-50/80mm Quick Mount/Snap to Release - Made in Taiwan - Image 4](https://m.media-amazon.com/images/I/710cHEcM5kL.jpg)
![BikeSpark Auto-Sensing Rear Light G4R for Cargo Carrier - 50lm Superbright Bike Taillight with Large Reflector – Li-Polymer Rechargeable – IPX6-50/80mm Quick Mount/Snap to Release - Made in Taiwan - Image 5](https://m.media-amazon.com/images/I/71dcpBNz4aL.jpg)

## Questions & Answers

**Q: Does the company offer replacement brackets? I don’t want to buy a whole second light to get a bracket.**
A: On the Q & A section on the product page, BikeSpark says they don't sell extra brackets, and don't recommend moving the light from bike to bike, but they don't say why. It would seem if you can safely remove the light to prevent theft, moving it to another bike shouldn't be a problem. I wanted a second bracket as well and found it wasn't available. I think the 'problem' is that they want to put the bottom-line ahead of customer satisfaction. It's a great light, don't get me wrong, but customers should be able to use it as they see fit.

**Q: Does light go out when fully charged?**
A: Yes the light goes out after fully charged

**Q: where is the photo of the mounting bracket to the rack ?**
A: The mounting bracket has 2 bolts that fit the standard reflector mounting holes in the rear rack.

**Q: Does it come with a mount?**
A: Yes. It's designed to mount on a flat surface like the rear of a metal bike luggage rack which usually has the standard holes pre drilled. The mount stays on the bike and the actual light securely snaps into it. It is the best light you can possibly buy for a bike. Make sure  you get the rechargeable model.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Just perfect
*by 0***4 on 18 October 2024*

I want to put on my electric scooter

### ⭐⭐⭐⭐⭐ Unfortunately the clip that Holds the lamp is not very secure..
*by M***E on 9 February 2022*

The light can easily fall offNice idea but the fixings need to be addressed.

### ⭐⭐⭐⭐ Great, but dodgy button
*by T***H on 8 July 2024*

I was really pleased with this light when it arrived. It fit well to the frame and the clipping mechanism is very sturdy, easily handling a bumpy ride. Slight delay on the stop light, but I expect that and it works great.Sad thing. I lost the on button. (Pictured) it’s a tiny red bit of rubber that I’m sure isn’t supposed to come free but did in my pocket. First time was ok, pushed it back in and it was fine. Second time, I didn’t notice and it is not lost at work (I don’t think I’ll find a full stop sized bit of rubber in a 5 story building..)The light can still be operated if you have something small enough to get into the housing (pen works) but now it’s not waterproof, currently contacting seller to see if anything can be done.EDIT: took a few weeks but the seller got back to me and sent me three replacement buttons, free of charge.

## Frequently Bought Together

- BikeSpark Auto-Sensing Rear Light G4R, USB Rechargeable, 240HRs, Precise Brake Sensing for Cargo Rack, Large Reflector, 50/80mm Screw Mounted, Easy Release, Made in Taiwan
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**Shop now:** [https://www.desertcart.vn/products/364539921-bikespark-auto-sensing-rear-light-g4r-for-cargo-carrier-50lm](https://www.desertcart.vn/products/364539921-bikespark-auto-sensing-rear-light-g4r-for-cargo-carrier-50lm)

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-03-02*