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- Serfas Thunderbolt USB Taillight
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Item #:
5189138
Serfas Thunderbolt USB Taillight
87% of respondents would recommend this to a friend
Item #:
5189138
USD 49
Price Details
Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )
*All items will import from US
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In stock
Imported from USA store
QTY:
Order now and get it around Saturday, September 26
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Being seen on your bike at night never looked so good until Serfas' Thunderbolt Taillight hit the scene.
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What Stands Out
High Visibility
The Serfas Thunderbolt USB Taillight offers exceptional brightness and visibility, ensuring you are seen from a distance during night rides, enhancing safety on the road.
USB Rechargeable
With a convenient USB rechargeable design, this taillight reduces battery waste and provides hassle-free power management, allowing you to focus on cycling without constant battery replacements.
Multiple Modes
Featuring several light modes, the Thunderbolt allows customization of brightness and flash settings, catering to various riding conditions and personal preferences for optimal visibility.
Product Details
| Power Source | Battery Powered |
| Water Resistance Level | Water Resistant |
| Mounting Type | Seatpost Mount |
| Number of settings | 4 |
| Light Output Maximum | 35 Lumens |
| Auto Part Position | Rear |
| Item Weight | 0.01 Ounces (0.28 grams) |
| Color | Black |
| Material Type | Silicone,Polymer |
| International Protection Rating | IPX6 |
| Brand Name | Serfas |
| Number of Pieces | 1 |
| Manufacturer | Serfas |
| UPC | 713835022993 |
| Global Trade Identification Number | 00713835022993 |
| Manufacturer Part Number | UTL-6BK |
| Model Number | UTL-6BK |
| Brand | Serfas |
| Material | Silicone,Polymer |
Who Should Buy?
-
Urban Commuters
Ideal for city cyclists needing bright visibility during early morning or evening rides in traffic-heavy areas.
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Night Riders
Perfect for those who frequently ride at night, ensuring they are seen by motorists with its powerful LED lights.
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Casual Cyclists
A great option for leisure cyclists looking for an easy-to-use, rechargeable taillight for enhanced safety.
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Long-Distance Riders
Not suitable for cyclists on extensive rides without charging options, as battery life might be insufficient.
Product Description
Serfas Thunderbolt USB Taillight
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
Is the Thunderbolt Taillight waterproof?
Answer: The Thunderbolt Taillight features a water resistant silicone body. -
Question:
How long does it take to fully charge the taillight?
Answer: The taillight fully charges in 3.5 hours. -
Question:
What are the different modes and run times?
Answer: The Thunderbolt Taillight has high beam, low beam, high blink, and low blink modes with corresponding run times of 1.75 hours, 3 hours, 7 hours, and 9.5 hours, respectively.
Serfas Taillights UTL-6BK Editorial Review
The Serfas Thunderbolt USB Taillight has received positive customer feedback, with many users praising its long-lasting charge and ease of mounting. The light is versatile and can be mounted on various parts of the bike, such as the seat post and seat stay. The USB charging feature is convenient, and the battery life is sufficient for daily commutes. However, there are some concerns about the light automatically turning off after a few hours of use, despite the battery still having charge. This has raised safety issues for users who rely on the light for visibility. Despite this glitch, the overall performance and reliability of the light have been well-received.
Customer Reviews & Ratings
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Pros
- Long-lasting charge
- Easy to mount
- Versatile mounting options
- Convenient USB charging
- Sufficient battery life for daily use
Cons
- Light may turn off automatically after a few hours of use
Platform Trust & Buyer Confidence
JK
Jasmin
Verified buyer
“Great products and very good service: very easy and very fast international delivery.”
9 September 2026 · via Trustpilot
AG
Anke
Verified buyer
“Wonderful online shopping experience, smooth transaction from the start. Payment method works conveniently and delivery is unexpectedly fast and reliable. You go the extra mile for service. What makes this even more amazing, you deliver to Namibia. I will remain a happy Ubuy customer and will increase my purchases for sure! Thank you!”
10 September 2026 · via Trustpilot
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Hazel
Verified buyer
“Very easy to find the products what you need, and so fast delivery, that’s why I highly recommended to others costumers to used ubuy.”
10 September 2026 · via Trustpilot
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Opaleye
Verified buyer
“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”
11 September 2026 · via Trustpilot
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Adele
Verified buyer
“Easy to find and order what you want on the website. Delivery is quick to the UK”
8 September 2026 · via Trustpilot
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Important information
- 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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USD 49
Order now and get it around Saturday, September 26
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:
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Features & Benefits
- Style and safety in one high-powered and affordable package
- USB rechargeable with 35 lumens of firepower
- Multiple rear facing mounting options
- 30 micro-LED strip for visibility to cars and bikes
- Rechargeable Lithium Polymer battery
- Technologically advanced safety light with various modes and run times
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