Key Points
- Invest in Safety: Prioritize safety by opting for an auto-sensing rear light with a deceleration algorithm, ensuring visibility to vehicles behind you.
- Convenience Matters: Choose a USB rechargeable light for easy and sustainable power source management, eliminating the hassle of frequent battery replacements.
- Weatherproof Your Ride: Select a light with an IPX6 water resistance rating to withstand various weather conditions, enhancing durability and reliability.
- Stay Visible and Compliant: Look for lights that offer optimal brightness levels while meeting regulatory standards, keeping you visible and safe on the road.
- Secure Installation: Consider the handlebar mounting type for a secure and stable attachment, preventing accidental dislodging during your rides.
- Make an Informed Decision: Use the buying guide to compare features, prices, and reviews to make a well-informed purchase decision tailored to your specific needs.
- 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.
- Highly Reflective Reflector Meeting Regulatory Compliance: BikeSpark BKS-G4R equips with the world-class vehicle reflector. The highly reflective reflector not only meets German and EU compliance but also provides up to 30% more than required reflective brightness.
- 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!
Last update on 2025-10-18 / Affiliate links / Images from Amazon Product Advertising API
As an avid cyclist, safety on the road is paramount. The USB rechargeable auto-sensing rear light has revolutionized my nighttime rides.
Its advanced technology detects motion and adjusts brightness accordingly, ensuring maximum visibility without dazzling other road users.
With a simple yet robust design, this rear light provides peace of mind during all cycling adventures.
Whether you’re commuting or hitting the trails, this innovative device offers unparalleled convenience, safety, and charge.
Say goodbye to constant battery replacements with its eco-friendly rechargeable feature.
Stay visible and secure on the road with the USB rechargeable auto-sensing rear light.
Summary
The Bikespark Auto-Sensing Rear Light G4R is a revolutionary bike safety accessory with an auto-sensing feature and advanced deceleration algorithm.
This rear light boasts automatic ON/OFF functionality through motion detection, ensuring enhanced safety for cyclists.
Meeting regulatory standards for brightness and reflectivity, this Taiwan-made product offers a 1-year warranty for added peace of mind.
| Spec | Value |
|---|---|
| Power Source | Battery Powered |
| Water Resistance Level | Water Resistant (IPX6) |
| Mounting Type | Handlebar Mount |
| Number of settings | 4 |
| Brightness | 50 Lumen |
| Auto Part Position | Rear |
| Item Weight | 0.08 Kilograms |
| Package Weight | 0.12 Kilograms |
| Item Package Dimensions | 4.72 x 3.58 x 1.85 inches |
| Item Dimensions | 4.25 x 1.57 x 1.3 inches |
| Deceleration Sensing | Yes |
| Automatic ON/OFF | Yes |
| Regulatory Compliance | Yes |
| Manufacturer | J-MEX Inc. |
| Made in | Taiwan |
| Warranty Description | 1 Year |
Key Features
The auto-sensing rear light on the Bikespark G4R is a game-changer regarding safety and convenience.
With its deceleration sensing algorithm, this light enhances your visibility to others on the road, making your rides safer.
Featuring an automatic ON/OFF function based on motion detection, this rear light ensures you never have to switch it on or off manually.
This hands-free operation adds a level of ease and efficiency to your cycling experience.
Regulatory compliance for brightness and reflectivity means you can trust that this rear light meets industry standards for optimal visibility.
Whether you’re riding during the day or at night, this feature ensures you remain visible to other road users at all times.
With four different settings to choose from, including various lighting modes and intensities, the Bikespark G4R allows you to customize your lighting preferences according to different riding conditions.
There’s a setting for every situation, from steady beams to flashing patterns.
The 50-lumen brightness output of this rear light provides ample illumination without being overly dazzling.
It balances visibility and energy efficiency, ensuring you can enjoy extended battery life while remaining noticeable on the road.
Auto-Sensing with Deceleration Algorithm
The auto-sensing feature on this rear light is a game-changer for safety. It automatically turns on when it detects motion, ensuring you’re visible at all times.
Not only does the deceleration algorithm enhance safety, but it also alerts drivers behind you when you’re slowing down or coming to a stop.
This triggers a brighter light, making your movements clear and noticeable.
USB Rechargeable Power Source
Easily recharge the rear light with any USB port, making it convenient and eco-friendly.
Say goodbye to disposable batteries and enjoy a hassle-free charging experience.
The long-lasting battery ensures you have ample runtime for extended rides without worrying about running out of power.
It keeps you visible throughout your journey, providing peace of mind in low-light conditions.
Water Resistance (IPX6)
The Bikespark Auto-Sensing Rear Light G4R boasts an impressive IPX6 water resistance rating, ensuring it can handle heavy rain and splashes without compromising performance.
The durable construction of this rear light makes it a reliable companion for all weather conditions.
Its ability to withstand moisture damage sets it apart from other lights on the market.
Whether you’re cycling in a downpour or facing unexpected splashes, this rear light will continue to shine brightly, providing peace of mind during your rides.
In my experience, having a water-resistant rear light has been invaluable during rainy commutes.
I no longer worry about the weather impacting my visibility to others on the road, thanks to the reliable protection offered by the IPX6 rating.
This feature especially benefits cyclists who frequently ride in unpredictable weather conditions or enjoy nighttime adventures where moisture exposure is expected.
The water resistance of this rear light ensures that you can focus on enjoying your ride without concerns about its functionality being compromised by rain or splashes.
- 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 ultra-bright 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. Four lighting modes accommodate various cycling conditions. Besides, two constantly-on lighting modes that comply with Germany StVZO Regulations help you riding safely in the darkest nights.
- Highly Reflective Reflector Meeting Regulatory Compliance – BikeSpark BKS-G5 equips with the world-class vehicle reflector. The highly reflective reflector is compliant with German StVZO standard.
- Type-C rechargeable – The light comes with a built-in 550mAh li-polymer battery and is rechargeable with the type-C port. Quickly and conveniently get the light fully recharged before cycling.
Last update on 2025-10-18 / Affiliate links / Images from Amazon Product Advertising API
Brightness and Regulatory Compliance
The 50-lumen output ensures you’re visible on the road, enhancing safety for yourself and others.
This optimal brightness level makes it easy for drivers and pedestrians to spot you from a distance.
Complying with regulatory standards means this rear light meets all requirements for brightness and reflectivity.
You can feel confident knowing this light adheres to safety regulations, providing peace of mind during your rides.
Mounting Type: Handlebar
Installing the Bikespark Auto-Sensing Rear Light G4R on your bike’s handlebar is a breeze.
With its handlebar mount, you can effortlessly attach the light without complications.
The secure fit provided by the mount ensures that the rear light stays in place throughout your ride.
Say goodbye to worrying about movement or vibrations affecting your lighting setup while cycling.
Buying Guide
Consider your needs: Before purchasing an auto-sensing rear light, consider the brightness levels required.
It’s crucial to assess your mounting options and battery life preferences to ensure the light meets your biking requirements.
Read customer reviews: Take advantage of other users’ experiences by reading customer reviews.
Doing so lets you gather valuable insights that may help you select the ideal auto-sensing rear light for your biking adventures.
Compare features: To find the perfect fit for your bike, compare different models based on their specifications, features, and price points.
This comparison will enable you to make an informed decision tailored to your specific biking needs and preferences.
Final Remarks
The auto-sensing rear light with USB rechargeable functionality offers cyclists a convenient and efficient solution for enhancing safety during rides.
With features like the deceleration algorithm, water resistance (IPX6), and compliance with brightness regulations, this rear light ensures visibility and reliability in various conditions.
The handlebar mounting type further adds to its practicality, making it a versatile choice for all types of bikes.
This product stands out as a top contender for those seeking a reliable and user-friendly rear light.
Explore the detailed product specifications and key features to decide on upgrading your bike accessories.
Don’t compromise on safety when cycling – invest in quality equipment that prioritizes visibility and functionality.
Upgrade your biking experience with the auto-sensing rear light today!
- High-Intensity LED & Brake Sensing Advancement:Illuminate your surroundings with our rear bike light’s high lumen COB LED. featuring smart sensor technology that activates a brake light when you slow down. The light emits a high-intensity flash for 5 seconds, alerting riders behind you for enhanced safety
- Dynamic Modes & Easy Install: Choose from 4 dynamic light modes: (1) Normal Flash, (2) Breathing Flash, (3) Fast Flash, (4) Steady On. Tailored for diverse riding conditions day and night. Effortlessly install with metal under-seat or rubber band seat post mounts. Fits road, mountain, cruiser, scooter
- Smart Auto On/Off & Battery Efficiency:- Experience intelligent functionality with our bike rear light. Equipped with Motion and Light Sensors, it automatically turns off after 30 seconds of inactivity. Once movement is detected or your bike is in motion, the light reignites (auto on/off applies to modes 1 and 2). For continuous daytime visibility, opt for modes 3 or 4 to bypass the Light Sensor (Brake sensing active in all modes)
- Extended Battery Life & Intuitive Power Display:Stay powered during your rides with the 400mAh Li-ion battery. On a full charge, enjoy up to 50 hours of usage. The built-in power indicator features four blue breathing lights, each indicating 25% battery capacity, ensuring you know when to recharge
- Durable Build & All-Weather Ready : Crafted from premium aluminum alloy, our bicycle brake light boasts an elegant metallic finish. Designed to withstand diverse weather conditions with an IPX6 Waterproof rating, making it suitable for any ride
Last update on 2025-10-18 / Affiliate links / Images from Amazon Product Advertising API
Frequently Asked Questions
Is the Bikespark Auto-Sensing Rear Light G4R suitable for all types of bikes with long battery life?
Yes, the Bikespark Auto-Sensing Rear Light G4R is designed to be compatible with various bike models due to its universal handlebar mounting type.
How does the deceleration sensing algorithm work in the auto-sensing rear light?
The deceleration sensing algorithm in the auto-sensing rear light detects when you are slowing down or coming to a stop, automatically adjusting the light output to enhance visibility and safety.
What makes the USB rechargeable power source convenient for users?
The USB rechargeable power source eliminates the need for frequent battery replacements. Plug it into any USB port for quick and easy charging, ensuring your rear light is always ready for use.
Can I rely on the water resistance feature of this rear light during rainy rides?
With an IPX6 water resistance rating, the Bikespark Auto-Sensing Rear Light G4R offers protection against heavy rain and splashes, making it ideal for use in various weather conditions without compromising performance.
Does this auto-sensing rear light comply with brightness regulations?
Yes, this auto-sensing rear light meets regulatory compliance standards for brightness and reflectivity requirements, ensuring you stay visible on the road while adhering to safety guidelines.
- Bikespark Auto-Sensing Rear Light G4R
- Power Source: Battery Powered
- Water Resistance Level: IPX6
- Mounting Type: Handlebar Mount
- Number of settings: 4
- Brightness: 50 Lumen
- Features:
- Deceleration sensing algorithm for enhanced safety
- Automatic ON/OFF with motion detection
- Additional Details:
- Made in Taiwan by J-MEX Inc.
- Warranty Description: 1 Year
