--- product_id: 346533951 title: "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" brand: "bikespark" price: "S/.346" currency: PEN in_stock: true category: "Bike Spark" url: https://www.desertcart.pe/products/346533951-auto-sensing-rear-light-g4r-usb-rechargeable-240hrs-precise-brake store_origin: PE region: Peru --- # 50 Lumens Ultra-Bright LEDs 240HR USB Rechargeable Runtime Precise Auto Brake Sensing 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 **Brand:** bikespark **Price:** S/.346 **Availability:** ✅ In Stock ## Summary > 🚴‍♂️ Light up your ride, stay ahead of the pack! ## Quick Answers - **What is this?** 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 by bikespark - **How much does it cost?** S/.346 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/products/346533951-auto-sensing-rear-light-g4r-usb-rechargeable-240hrs-precise-brake) ## 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 Mount:** Tool-free 50/80mm rack mounting with easy-release for fast installation and removal - • **Smart Brake Alert:** Instant ultra-bright boost on deceleration for safer rides - • **Reflector That Shines:** World-class reflector exceeding EU brightness requirements by 30% for enhanced rear visibility - • **Effortless Auto On/Off:** Motion-activated lighting with 1-minute auto shutoff—never forget to switch off - • **Regulation-Ready Visibility:** 220° wide-angle LEDs meeting ISO & German StVZO standards for ultimate night safety ## Overview The BikeSpark Auto-Sensing Rear Light G4R is a USB rechargeable, IPX6 water-resistant bike tail light featuring a patented deceleration sensing algorithm that boosts brightness instantly when braking. With 50 lumens output, 4 lighting modes, and a highly reflective EU-compliant reflector, it ensures superior visibility and safety. Designed for quick rack mounting and easy release, this Taiwanese-made light offers up to 240 hours of runtime and automatic on/off convenience, making it a must-have for professional cyclists who demand reliability and cutting-edge tech. ## Description desertcart.com : 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 : Sports & Outdoors ## 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. - 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! ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0991V426W | | Auto Part Position | Rear | | Best Sellers Rank | #117,588 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #150 in Bike Taillights | | Brand Name | BikeSpark | | Color | Black, Red | | Customer Reviews | 4.3 4.3 out of 5 stars (1,339) | | International Protection Rating | IPX6 | | Item Dimensions L x W x H | 4.25"L x 1.57"W x 1.3"H | | Item Weight | 0.08 kg | | Light Output Maximum | 50 lumens | | Manufacturer | J-MEX Inc. | | Manufacturer Part Number | AQ-6OW2-VCVP | | Material Type | Plastic Or Metal | | Model Number | AQ-6OW2-VCVP | | Mounting Type | Rack Mount | | Number of Items | 1 | | Number of Packs | 1 | | Number of settings | 4 | | Power Source | Battery Powered | | Warranty Description | 1 Year | | Water Resistance Level | Water Resistant | ## Product Details - **Brand:** BikeSpark - **Color:** Black, Red - **Item Weight:** 0.08 kg - **Light Output Maximum:** 50 lumens - **Material:** Plastic Or Metal - **Mounting Type:** Rack Mount - **Number of settings:** 4 - **Power Source:** Battery Powered - **Product Dimensions:** 4.25"L x 1.57"W x 1.3"H - **Water Resistance Level:** Water Resistant ## Images ![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 - Image 1](https://m.media-amazon.com/images/I/71onBMCdx7L.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. ## 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 - BriskMore Handlebar Bike Mirror, Scratch Resistant Glass Lens, Ajustable and Rotatable Safe Rearview Bicycle Mirror - ROCKBROS Bike Bell Classic Bicycle Bell Mountain Bike Bells for Adults with Loud Sound and Fit for 0.87-1.25in/22.2-31.8mm Bicycle Handlebars --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pe/products/346533951-auto-sensing-rear-light-g4r-usb-rechargeable-240hrs-precise-brake](https://www.desertcart.pe/products/346533951-auto-sensing-rear-light-g4r-usb-rechargeable-240hrs-precise-brake) --- *Product available on Desertcart Peru* *Store origin: PE* *Last updated: 2026-10-12*