All new orders ship on July 29th.



SKU: RE-00321

What does the options mean?
Carbon-neutral shipping with Shopify Planet
Carbon-neutral shipping on all orders

The CIO+ bike lights operate on its own eco-friendly power, with the use of a friction-free system, composed of two small magnets mounted on the spokes and a generator integrated into the light itself.

In this upgraded "+" version, the set comes included with two extra magnets for extra power.


Award Winning Design

CIO has received a Reddot design award for its unique and streamlined design with an integrated mounting system, which allows for easy installation on almost any bike. 



The lights are mounted with ReeMount™ – a straightforward and secure wire system that makes positioning your lights faster and easier than ever before. The wire is made from coated stainless steel, ensuring a strong mount and minimising the risk of breakage or theft.


ReePower™ Flash

With no power switch required, CIO is designed to meet the demands of modern transportation. Reelight battery free lights are always on, allowing you to be visible day and night, and in all kinds of weather – and all you have to do is ride. If you stop your bike momentarily, the CIO’s ReePower™ backup system automatically continues to supply power for two minutes, ensuring you are safe even when stopping in traffic. 

The set includes: Front light and rear light, four magnets, mounting guide and mounting tool.

Powered by magnets - No friction
Uses no batteries
Complies with Danish legislation
ReePower™ Flash
Continues flashing for two min.
Flashing light
Waterproof and tested for harsh weather conditions.
Mounts in seconds with ReeMount™
Tool included
Bright safety light
Permanently mounted
Theft proof
Always on
- reduces accidents by 47%
Only for regular spokes

Unboxing: CIO (V3)

Unboxing: CIO (V2) LHT

Product Review

How to Mount

Customer Reviews

Based on 9 reviews
George Gigiolio
14 days and not delivered!

I just got a notice to review, but it would be nice after 14 days if it was delivered where is it?

John carnie
Great product - makes me feel safe!

Relatively simple to mount - ~I had trouble with the rear light, but Randi from Reelight sent me a replacement very quickly. All now working and the fact that I don't need to worry about batteries and the lights continue to flash for a time after stopping gives me comfort. An excellent product

Thanks a lot John :)

Waste of money

The slant of my rear fork makes the light useless, unless I want to be seen by aircrafts.

The front light is equally useless, being my fork-rim distance too big to keep the light straight.

This is my second failed purchase at Reelight, mainly because of their poor product descriptions that does not help customers understand whether their lights suit different bike models.

Instead of paying again some € 20 for an international return I'd rather throw these lights away this time.

Dear Andre,

We apologize for the inconvenience you experienced with CIO+. We have a comprehensive FAQ ( that addresses issues like the ones you encountered. We are committed to assisting our customers who have difficulty installing our products, so please feel free to reach out to us at Thank you.

Maybe faulty, or else very bad..

Bought them from another dealer, but impossible to attach:
one of the magnets couldn’t be tightened, kept going loose.
The lights themselves couldn’t stay tight, could just wriggle them loose with no effort. And yes I really tightened with full force.
Also the dealer have send me the standard CIO though they sold
It as the + version, and it had clearly been opened before.
I’ll give you guys the benefit of doubt since so many people have left positive reviews, but I’m really disappointed.

Hi Peter,

Due to the box being opened, we cannot assure the product's quality and recommend returning the lights to the dealer for a refund.

Nice product

The lights work well and last a decent time after stopping. However they are more noisy than expected, even when the distance to the magnet is a bit larger than indicated by the instructions. When installing the lights, you should be careful not to tighten them too much. I might have ruined the screwhead on one of the lights during installation, as I wasn't sure how tight it needed to be, to stay in place in the long term.

Thank you a lot for the feedback Troels! If the screwhead on the light was damage during installation it is covered by our warranty. Should you experience any issues, please contact us at