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CIO Battery-Free Bike Light

Be seen everywhere in an eco-friendly way with the Reelight CIO Battery-Free Bike Light. This incredible system uses two parts to make the lights work. First, the light itself attaches to your frame with the ReeMount™. Another module attaches to the spoke on your wheel. As you cycle, the CIO lights connect with their respective magnets. The result is the self-powered light. The CIO Light employs this magnetic energy to produce a flashing mode. Drivers and other cyclists alike will always be able to see where you are for maximum safety. In addition, when you stop or brake, the CIO ReePower™ backup light will continue to flash for two minutes to ensure you’re visible. Totally waterproof, the CIO Light is easy to attach with the patent pending mounting system. You can also effortlessly move it from bike to bike which is great for city bike rentals or people using multiple bikes.

CIO Battery-Free Bike Light
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Discovered On
Discovered By
Weston Lanpher
Show Product Specs
Patented Mounting System, Waterproof
Visibility Range
300 Meters
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Kickstarter Comments (47)
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@ ReinaldoVargas: If you liked SL100 I think you are really gonna love CIO! Regarding the magnet module it is actually not something we have tested yet. In theory it should work but the electronics might have some difficulties detecting the magnet passing. You could always give it a try if you want. @ Kian: Thank you for your feedback. We are happy to hear that you are satisfied with the solution :)
Hi, I´m very looking forward to have my new lights. Now, I have the SL100, bought them like seven years ago in Denmark before moving back to Chile and they have never failed me. I was wondering if the magnets from the SL100 will be compatible with the CIO?
Kian Kirchhof
I appreciate the update on EU shipping. I dont mind a month extra, as duties can often take as long with a huge expense included.
@WAbels: Thank you for the help :) We should have an answer for you early next week.
>Giulio Coluccia am Juli 18
>I think you should really consider the option of sending the CIOs from the EU to European >customers. >Reelight
>@Giulio Coluccia: We are strongly considering this, but we would like to get an overview when >the campaign ends. We will try to give you some information about it as soon as we know. Vereinigtes Königreich 137 Unterstützer
Deutschland 121 Unterstützer
Dänemark 67 Unterstützer
Niederlande 51 Unterstützer 367 European Customers, is this enough to send it from the EU ?
Wonderful news! Another steps for a battery free world! :)
Well done guys!
Hi @Marinettaroulettes, Yes it will be possible to ad additional sets to your order through Backerkit. We will send out a survey at some point when the campaign is over :) And yes all sets will be given with an extra set of magnets. :) So 4 magnets per bike light set.
Hi - will it be possible to add a few additional light sets through the backerkit once the campaign is over? If yes, will they still have the two additional magnets from the stretch goal included?
@souichiro tachibana: Actually the production lights will be darker than the ones used for the campaign (it is a very dark grey but not totally black). We will have some pictures up soon but it looks very cool! @Andreas: There will no colour options unfortunately :)
souichiro tachibana
I am glad when I can choose the color.
Thank you.
Please, will there be a black version of lights & magnet? Would be better for all the black bikes out there (mine too:))!
Anton Wretling
Oh, yeah! Congrats CIO! I'm very happy we met the stretch goal!
@Stiqman: That won't be necessary - we just hit 650.000 DKK :) Stretch Goal unlocked = 2 extra magnets pr. CIO set for everyone! Thank you all for your incredible support :)
TBH I honestly felt the stretch goal was a very far reach (compare to other Kickstarters that double the original goal) for a few magnets...should have been set at about 550,000 (just over double the first goal). Maybe reconsider??
@Johan: I would not recommend it since the wheels are very small and there are no spokes to mount the magnets on. Should you decide to give it a try anyway we would be very happy to hear how it works out :)
@Reelight: Do you think the lights will work on my Strida? Or if I can jerryrig it.
@Tokita Syunsuke: Hi, We still hope to reach the stretch goal :) But if we don't you will be able to buy additional magnets when the campaign is over through BackerKit. Therefore, you should not increase your pledge amount just to get magnets this will be an opportunity later :) All the best Mille
Tokita Syunsuke
DKK 68413 to the stretch goal. We need more than 200 new backers? Can I increase pledge amount now and use these money to buy additional magnets? Though I don't know how much additional magnets cost.
i hate buying gas
One set is a front light and magnet and rear light and magnet. 2 lights. 2 magnets.
Barry MacDonald
Fantastic product, when you refer to "Sets" is it two lights & two magnets... or 1 light and 1 magnet? I apologize if this information is available somewhere but i could not find it.
@ That is an interesting question! We have not tried this but it should be possible. however you would need a magnet for each light as it needs to be close to it in order to work properly. Also the flat surface of the magnet needs to be pointing towards the light. @ Henry L: It is a difficult question to answer as it depends on many different factores. Also a flash is very difficult to measure. Initial measurements of the front light shows about 25lm running with one magnet. This output will increase with the amount of magnets you attach but we have no measurements on this currently. The LED is capable of outputting 160lm. I hope that is answer enough for now :) @ Philipp Jent: We can only offer the lights as a set (front + rear light). This is because of the way the lights are manufactured and packed.
Fer G
@Reelight how would it work with two pairs of lights on the same bike?
In the FAQ it is written that the side of the light could be changed with a screwdriver by swapping the front and back lights.
Would a magnet work for both lights? Or each side would need its own magnet because of distance?
Henry L
@Reelight: how many lumens does the light output at maximum state?
Philipp Jent
Is it possible to order 1 set but getting 2 red backlights instead of 1 back-/1 frontlight? Thanks!
@Stewart Walker: Hi, yes you will have the opportunity to purchase additional sets through BackerKit in the end of the campaign :) Cheers, Mille
Stewart Walker
Will there be an option to purchase additional magnet sets post campaign
i hate buying gas
Thanks for the update. It appears extra magnets gets you to peak light output quicker and would be an advantage at lower speeds. 2 or 3 magnets seems to be the optimal number in my opinion.
Ok, I'll give it a try and feedback.
@Giulio Coluccia: We are strongly considering this, but we would like to get an overview when the campaign ends. We will try to give you some information about it as soon as we know. Best, Mille :)
Giulio Coluccia
I think you should really consider the option of sending the CIOs from the EU to European customers.
@ Kim Tieu: The magnets can be pretty far away but ideally they should be mounted between 2 and 5 mm. I am not 100% sure what is it you are trying to achieve but I would love to see the results :) It should however be noted that the flash frequency is software controlled to be 2,6 hz at all times. We will post a video shortly. @ Stephan Spence: The light uses a capacitor instead of a battery. The capacitor drains after a while but will charge quickly again. This will also be shown in the video. The capacitor should not suffer from being idle over longer periods.
Stephan Spence
What happens if the light is dormant for longer periods if time? E.g. the bike is put into a garage for 4 months. I am thinking about battery capacity/functionality - will it suffer dramatically as a result?
Kim Tieu
Hi, what is the max distance the magnet needs to be from the light? I'm backing for a pair of CIO lights and wondering if both lights would work with one magnet if I mounted 2 CIO's on my bike (so I can space the magnets out to create more consistent light?)
@ Rene: Thank you for asking. That is a cool bike! You should have problems fitting the lights on that on. The seat stay is a little low angled, so the rear light might be pointing up a little bit. We are very interested in testing the lights on as many different bikes as possible, so if you promise to give us some feedback me might be able to compensate you if they should not fit :)
Would like to know if Cio can be fitted on my bike as it's narrow and curved shape fork:
@I Hate Buying Gas: Hi. We haven't agreed on an exact price yet, but it will probably not exceed 5 dollars per single magnet - the sales department are the ones in charge of that, and I will let you know when the price is set. :) @Tim Regalia @I Hate Buying Gas: We hope that we hit the goal too! :) Then you don't have to make your own and hopefully the price of the magnets won't be too expensive if you should lose one or want an extra. Cheers, Mille
i hate buying gas
Or mod our own magnet mounts with a 3d printer and a rare earth magnet....won't be secure but would work.
Tim Rezgalla
I can see a few thrifty modders getting the sugru and magnets out & making their own extras up...may not look as tidy but would work if done right,I am hoping the 65k is hit,saves having to be thrifty lol :)
i hate buying gas
How much will extra magnets be if the 650k isn't hit?
S.rozier: Fortunately the CIO bike light is designed to be theft proof. The wire, which the bike light is mounted with, is made out of stainless steel. Therefore, the wire is incredibly strong and helps to ensure that the light stays on the bike and does not get stolen. Off course we can not guarantee that nobody will try to steal it, but we have done ours to make sure that it is as safe to keep on your bike, as possible. If somebody tries it will be very difficult for them to steal it and almost impossible for them to do it without breaking the lights. Hope this helped :) Sincerely, Mille
I just noticed you ve put theft proof in the description. Can you explain please?
Hello. I ve seen your current lights and they are great. What I m concerned about is robbery. I commute by bike in Paris. Unfortunately if you leave anything on your bike, it will be gone when you are back. Is your system robbery proof? The older one was by using special bolts on the hubs. this is very important for commuters as it s such a pain to install and reinstall at each ride...thanks
Frederik N
@Mille: Sounds great. Danish Design that can save lives.
@Frederik Nygaard: Thank you for asking! If the CIO bike lights are mounted correctly and tight enough they will not be able to block the wheel. CIO is also extremely strong, both in the wire and in the material in general, so pulling in it should not be a problem either :) Cheers, Mille
Frederik N
Justed backed the CIO - looking forward to great looking lights for the bike.
When mounted correctly, is there any risk that the CIO will turn into the wheel by accident and block motion? And have you tested that the CIO can in fact survive if someone pulls vertically up or down in it, risking either snapping the stell cord, or the base of the CIO?
@Tim Rezgalla: Yes it's some great ideas! We are already planning on making a video that shows how the magnets work and then in addition we will make the one with the PCB's :)
Currently our engineer is on a business trip, but when he gets back we will produce the videos. Best, Mille
Tim Rezgalla
Thanks Millie,no rush but it's definitely an option I'll like...It'd be great to see them in action with a variety of magnets at various speeds,so we can better guess how many we will want at the survey stage :)
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