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- Auto-Sensing Rear Light G4R, USB Rechargeable...
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Item #:
38674877
Auto-Sensing Rear Light G4R, USB Rechargeable, 240HRs, Precise Brake Sensing for Cargo Rack, Large Reflector, 50/80mm Screw Mounted, Easy Release,
Item #:
38674877
SCR 1015
Price Details
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*All items will import from US
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Imported from USA store
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Order now and get it around Friday, July 10
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BikeSpark’s Auto-Sensing Rear Lights detect bike deceleration with an innovative deceleration sensing algorithm, Vsenx (US Patent No.: 10427594 B2), alerting and improving the reaction time of the person in any vehicle traveling behind.
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What Stands Out
Auto-Sensing
The G4R's auto-sensing technology detects braking automatically, enhancing safety without manual adjustments, making it perfect for cyclists who prioritize convenience and functionality.
Long Battery Life
With an impressive 240 hours of usage on a single charge, this rear light ensures you’re visible on long rides, providing peace of mind for commuters and touring cyclists alike.
Easy Installation
Featuring a simple screw mount for 50/80mm racks and a user-friendly release system, installation and removal are hassle-free, catering to riders seeking efficiency and reliability in their gear.
Product Details
| Package Weight | 0.5 Pound |
Who Should Buy?
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Urban Commuters
Ideal for daily city cyclists needing visibility and safety during nighttime or low-light commuting.
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Frequent Cyclists
Perfect for cyclists who ride regularly and require a reliable, long-lasting light for various rides.
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Cargo Bike Users
Designed for riders with cargo racks who need a robust light that easily mounts and enhances rear visibility.
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Off-Road Riders
May not be suitable for cyclists who frequently ride on rough terrains needing more durable and rugged lighting.
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Short-Distance Riders
Less beneficial for casual cyclists who only ride short distances during the day and require minimal lighting.
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Budget-Conscious Shoppers
Not ideal for users seeking inexpensive lighting solutions, as this product may be priced higher than basic lights.
Product Description
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
Have any Query? Chat with us
Customer Questions & Answers
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Question:
What is the Auto-Sensing feature of the G4R rear light?
Answer: The Auto-Sensing feature of the G4R rear light automatically detects when you apply the brakes, activating the rear light for extra visibility. This ensures that other road users are alerted when you slow down, enhancing safety. The precise brake sensing is crucial for cargo racks, especially during busy cycling conditions, allowing for seamless rides without manual adjustments. Whether commuting or enjoying a leisurely ride, this feature promotes awareness and safety. -
Question:
How does the USB rechargeable function work?
Answer: The G4R rear light comes with a built-in USB rechargeable battery that allows for convenient charging. Simply connect the light to any USB port using a compatible cable. This rechargeable feature eliminates the need for disposable batteries, making it an eco-friendly choice. Ideal for cyclists who frequently use their bike, this ensures your rear light is always ready for use with minimal hassle. -
Question:
How long does the battery last on a full charge?
Answer: Once fully charged, the G4R rear light boasts an impressive battery life of up to 240 hours. This extended duration allows you to cycle for weeks without worrying about recharging. This makes it perfect for long-distance riders or those who often commute in low light conditions. You can enjoy worry-free rides knowing your rear light will consistently perform day in and day out. -
Question:
What size is the rear light, and how is it mounted?
Answer: The G4R rear light features a compact yet robust design suited for cargo racks with a mounting screw size of 5080mm. Its size is optimized to maintain a low-profile while providing substantial visibility due to its large reflector. This design ensures easy installation and stability on your bike. Whether you have a standard cargo setup or a specialized frame, the G4R fits seamlessly. -
Question:
Is the rear light water-resistant?
Answer: Yes, the G4R rear light is designed to be water-resistant, making it suitable for all weather conditions. This quality ensures reliability for avid cyclists who ride in unpredictable weather. For commuting or recreational biking, a water-resistant light provides peace of mind, allowing you to continue your rides without concerns about rain or splashes compromising your visibility. -
Question:
Can the light be used during the day?
Answer: Absolutely! The G4R rear light is bright enough for daytime use, ensuring visibility even in daylight. It can significantly enhance your safety when cycling in bright conditions. Ideal for urban commuting or weekend rides, using the rear light during the day increases your visibility to drivers and pedestrians, ensuring a safer riding experience. -
Question:
Is the light easy to remove and attach?
Answer: Yes, the G4R rear light has an easy release mechanism that simplifies attaching and detaching. This feature is great for cyclists who need to take the light off when parking their bike or who prefer to switch it between multiple bikes. It's perfect for convenience, especially if you often find yourself moving your bike in and out of storage. -
Question:
What's the significance of the large reflector?
Answer: The large reflector on the G4R rear light dramatically enhances visibility, making it easier for other road users to see you from a distance. The increased surface area of the reflector improves light dispersion, ensuring you stand out in low light conditions. This feature is particularly crucial for nighttime cycling or foggy conditions, where visibility is paramount for safety. -
Question:
Where can I buy the Auto-Sensing Rear Light G4R?
Answer: You can purchase the Auto-Sensing Rear Light G4R on Ubuy, which stocks a wide range of high-quality cycling accessories. Ubuy offers a convenient shopping experience with various payment options and reliable service. This ensures that you can find the specific product you need to enhance your cycling safety with confidence.
BikeSpark Taillights Editorial Review
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“The product received very good packaging & safe…Thank You”
16 June 2026 · via Trustpilot
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“Accurate delivery timing given”
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“Not madly expensive like I thought, and much quicker than promised.”
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6/7/2026 · via Trustpilot
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“The process was smooth, with clear communication and timelines. This was my 1st purchase and I am really impressed. I will definitely be coming back.”
12 June 2026 · via Trustpilot
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- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
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SCR 1015
Order now and get it around Friday, July 10
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
Secured transaction
Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.
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Fastest cross-border delivery
Features & Benefits
- Auto-sensing rear light detects bike deceleration
- Increases brightness to ultrabright for 2.5 seconds
- Automatic ON/OFF feature
- Meets ISO 6742 1/3/5 and Germany StVZO Regulations
- Highly reflective reflector exceeding regulatory compliance
- Quick mounting and snap to release