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Auto-Sensing Rear Light G2 -Super Bright LED Bike Tail Light - Auto On/Off & Deceleration Flash by Motion Sensing - USB Rechargeable - IPX5 - Made in Taiwan

  • Based on 317 reviews
Condition: New
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Returnable until Jan 31, 2025

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Availability: In Stock.
Fulfilled by Amazon

Arrives Tuesday, Sep 2
Order within 21 hours and 56 minutes
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Features

  • Ride Safely with Confidence - BikeSparks 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 seconds, alerting and improving the reaction time of the person in any vehicle traveling behind.
  • Auto ON/OFF - Press and Hold the Control Button until the Light is On 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 - Super bright SMD LEDs provide excellent visibility, up to 20 lm with low power consumption.
  • USB Rechargeable & Li-polymer Battery - No need to keep spending your money on batteries. BKS-G2 comes with a charging cable that charges from your computer, power bank or any device with a USB 2.0 port. Please fully charge the battery before using it.
  • 220 Degree Visibility / Easy Installation / IPX5 Water Resistance / Four Lighting Modes with Safe Flashing Features / Made in Taiwan

Color: Red, Black


Brand: BikeSpark


Material: Rubber


Power Source: Battery Powered


Water Resistance Level: Water Resistant


Mounting Type: Seat Mount


Number of settings: 4


Brightness: 20 lumen


Auto Part Position: Rear


International Protection Rating: IPX5


Color: ‎Red, Black


Brand: ‎BikeSpark


Material: ‎Rubber


Power Source: ‎Battery Powered


Water Resistance Level: ‎Water Resistant


Mounting Type: ‎Seat Mount


Number of settings: ‎4


Brightness: ‎20 lumen


Auto Part Position: ‎Rear


International Protection Rating: ‎IPX5


Manufacturer: ‎J-MEX Inc.


Item Package Dimensions L x W x H: ‎4.8 x 3.82 x 2.17 inches


Package Weight: ‎0.1 Kilograms


Item Dimensions LxWxH: ‎0.9 x 1 x 2.9 inches


Brand Name: ‎BikeSpark


Part Number: ‎9


Date First Available: October 4, 2018


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Sep 2

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Really cool, works as described
It has different light modes, and theyre all bright. And then it gets brighter when it senses you slow down, acting as a brake light. Battery life seems to be very good. Some people say they are having trouble with the latch, but i have mine on my backpack and it works fine, no issues for me there but I could see where it could be more secure. Would recommend ... show more
Reviewed in the United States on June 23, 2021 by Jeremy Jackson

  • Decent tail light
It is not a bright daylight tail light but it’s auto on/off function is great . The battery does not need recharging very often , in fact after the first charging I’ve yet to recharge . I bike about an hour and 1/4 per trip and while I’ve been busy with other pursuits so I’m not riding as much as I often do , I find this feature is really great. ... show more
Reviewed in the United States on September 8, 2021 by ron

  • So nice to not have to remember to turn it off
Brake light is easy to install and so nice that you don't have to remember to turn it off. There were no printed instructions in the package but it's easy to figure out. It's bright and continues to flash until bike was stopped for just about 2 minutes.
Reviewed in the United States on August 19, 2022 by Fam Amazon

  • Good light, bright and clear.
I read a few reviews about the light falling off. It is correct there are no mounting instructions, so I looked over the attachment carefully, and saw that there are really two hooks from the same latch mechanism. Once you've looped it around the seat post look closely and you'll now see another hook (back side of the S hook protruding). Hook the last loop with that and it will now be secured with two hooks. I'm hoping by doing that it will be much more secure. ... show more
Reviewed in the United States on December 22, 2020 by Consumer

  • Bright light be zero instructions
I hope the rear light will provide good service, but it was frustrating there were zero instructions with the package. No QR code, nothing written on the package itself, no paper insert. The light has smart features like auto on/off and deceleration warning, but no indication of how to engage these. I had to return to the amazon website and read all the way through to find these bare-bones instructions. "Auto ON/OFF - Press and Hold the Control Button until the Light is On and You are Good to Go" then further down the page... "After charging the battery, simply press and hold the control button for 1.5 seconds to turn it on. You are good to go for weeks.." There should have been some clue about how to engage this feature included with the product itself. ... show more
Reviewed in the United States on September 3, 2024 by Gary K

  • Works as promised!
I must admit, I was uncertain about this purchase. But the rear light does exactly what's promised. It turn on when it senses motion, and the lights get brighter when I slow down. Easy to attach ... easy to charge (though ( haven't needed to do so). This is a gizmo you can buy with confidence.
Reviewed in the United States on June 11, 2019 by radiosatx

  • Don't bother
All of the features work, including the brakelight feather. BUT, the light itself is VERY dim. I charged it to 100 percent and still the flashing/strobing modes are barely noticeable in indirect sunlight, let alone direct. It could work okay as a light for the dark, but for a light during the day, it's far too weak. ... show more
Reviewed in the United States on February 16, 2023 by HawML

  • Cool Product!
I'd say about 80% of the time I forget to turn on my rear tail light when going on a bike ride. I often forget to turn it off too until I'm home. This product solves both of those issues. Came in a nice package and looks to be built well. I tested out the stop-start lights by hand and it does appear to work well with little motion as described. I'm leaving it 4 stars for now for two reasons. 1. It didn't come with instructions. Granted it is pretty simple to operate but a little mini page or two guide would be beneficial for people like me that may accidentally break a product while unattaching it from the seat connector to the clip. That didn't happen, the plastic is very sturdy. 2. I haven't used it out on the road yet. If my friends say it works well behind me definitely will come back and give it 5 stars. Rechargeable for 90 hours is a lot of seat time too and no battery needed! Another nice feature. ... show more
Reviewed in the United States on February 25, 2019 by PattyO

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