Jirvyuk Bicycle Tail Light: Brake Sensing Rear Light for Enhanced Safety on the Road

brain: I installed this on my daily commuter bike and after some initially tricky negotiation with my saddle rails it went on ok. You may find that if you have a saddle bag it will need to be repositioned. The simplicity of use and the overall form factor are nice, but I've never once had the battery last as long as advertised in any mode. I've only had this a couple months and this doesn't inspire much confidence in the long term health of the battery. My commutes are about 40 minutes each trip and I only use this light in the evening. The longest I've gone between charges is 5 days, or approximately a little less than 3 hours of actual use.

UPDATE: After my first review, the manufacturer helped answer my questions and sent out a replacement. The replacement had some of the same battery life issues, but the customer service was great and very helpful.

United States on Nov 06, 2021

Shafty: Is it bright? Yes. WAY bright.
Does it stay secure over bumps? Yes. It tightens directly to the saddle rails. Solid.
Does it work? Yes.

Best rear light I know of, and I've commuted in traffic for 10 yrs.

It's super bright, rechargeable, has multiple modes (my favorite is the pulse/strobe where it fades in and out instead of BLINK BLINK BLINK).

The motion sensor is really the icing on the cake. It functions as a SOLID brake light when you slow or stop, and it automatically turns off after a minute when you park, then automatically turns back on when you start going! But it's super sensitive, even a loud noise will turn it on if you're parked. As long as you're in the saddle it will never turn off, even if you are stopped at a light.

Everybody keeps asking me about this little light and how

United States on Nov 03, 2021

Russell S.: I use the light on my bike as a tail light. I like the braking feature, I already have a flashy rear light for visibility. This helps communicate with drivers on the road. Can't have too many lights on your bike! The charging feature is nice, the butt cap screws off to reveal the USB port, so there's no concern for water intrusion. I haven't used in the rain yet but it seems well made. The single button control is ok, I wish it was a little easier to use but I suspect it's part of the waterproofing.

United States on Jun 15, 2021

dirt surfer: Nice looking unit easy to install. bright and effective but the battery is pathetic. Last less than 4 hours when fully charged. Died on 2 consecutive ride of less than 4 hrs after fully charging per instructions. returned and very disappointed

United States on Jun 01, 2021

Gmar459: This light is sufficiently bright. It is designed to mount to the seat post with a rubber strap around the post or to the seat rails with an included clamp. The light unscrews from an aluminum base when it comes time to recharge or if you don't want to leave the light attached to bike while unattended, which is a nice feature. The charge port is located on the backside of the light. I had to end up returning the light due to no fault of the light but rather I had no place to mount on my bike due to the type of suspension seat that it has, and also I have a bag mounted to the rear rack which prevents mounting to the seat post, as it blocks the light from being seen. I tried to mount to my helmet but that didn't work adequately due to the shape of the rear of the light bracket which is curved and thicker on one edge, (to compensate for the angle of the seat post) which prevented the light from pointing straight back when attached to helmet. The light would be great for any bike that has available seat post or seat rails for mounting, and if you don't have a rear bag that is in the way. If some type of helmet mounting adapter could be included in the future I would definitely use.

United States on Mar 12, 2021