Busch & Müller IQ Cyo

I’m currently evaluating the new Busch & Müller IQ Cyo R Plus dynamo headlight. This is the light B&M developed to compete with the current crop of super-bright dynamo-powered headlights such as the Schmidt Edelux, Inoled Extreme, and Supernova E3. My first impression is very favorable. A full report is forthcoming.

14 Responses to “Busch & Müller IQ Cyo”

  • J. Brewer says:

    I’m curious as to how the best of these dynamo headlights stack up against the best of the high-powered, li-ion driven LED systems. Is there a clear difference? Can you shed some light on it for us?

  • John says:

    I got a B&M IQ Cyo when my old Shimano Nexus lights when kaput. It is awesome. The first time I road home in pitch black, I kept checking over my shoulder looking for the car that was behind me. No one was there. It was my light. Also, my Shimano lights were only lit while in motion. This light has a stand light and will stay brightly lit for some time with just a single rotation of the dynohub. Well worth the money ($120 for mine).

  • Bryan says:

    We were very pleased with this light … it was part of the custom commuter build-up for this Long Haul Trucker.


    Installation was simple and it worked perfectly with a comparable taillight.

    I took the bike for a spin just before dusk and was VERY impressed with the light output and the duration of the standlight. Simply really good quality stuff … just the way we like it.


  • Alan says:


    These dynamo powered lights are not as bright as high powered li-ion systems. These “Euro-style” lights are intended for commuting on public roads and provide plenty of output for that purpose. The extremely bright (and expensive) battery-powered systems are primarily intended for 24-hour racing. The B&M and Schmidt dynamo powered LEDs have focused beams with a sharp cut-off at the top (similar to automotive headlights) which is preferred for public roadway use, whereas the big li-ion systems have symmetrical, round beams designed to light up a forest.

  • Eddie says:

    Darn! You mean I can’t keep chicken nuggets warm under it?

  • ksteinhoff says:

    Any idea how it compares with a DLumotec Oval Senso Plus? I’ve been reasonably happy with that light: it comes up at slow speeds; produces a decent amount of ligh; is LED, so I can run it all the time and the standlight works.

    But, I’m always on the quest for the perfect headlight…

  • Alan says:


    The IQ Cyo is the next generation past the Oval Senso Plus. It’s far brighter (more than double) and has a better beam. This light would be a significant upgrade from what you’re currently using.


  • ksteinhoff says:


    I run with the Oval Senso Plus as the primary and a Busch&Müller Lumotec as a secondary headlight, plus a Busch&Müller 4DToplight Senso Multi tail light.

    Will the IQ Cyo allow the use of a secondary headlight (although I’m not sure you’d really need one if the IQ is as good as you say) and tail light?

  • Ows says:

    I cycle every day, and while I’d never regard myself as a “serious” cyclist, I have a sense of childlike wonder at ‘little’ bicycling improvements such as fenders, chainguards, racks and dynamo lights.
    My Specialized Globe City 6 (this: http://www.evanscycles.com/products/specialized/globe-city-6-2008-hybrid-bike-ec001481) which I bought at the beginning of the year for a price far in excess of what it retails at now (argh!!) came with Busch & Muller, or B&M, dynamo lighting fitted as standard. To anyone doubting the need for such frivolities, I can assure you, they’re a class apart. On dark towpaths and unlit streets there’s nothing like the security of knowing that as soon as the wheels start turning, you’re flooding the way with light… oh, and more than that, people SEE you!

    The Globe came with the following fitted:
    http://www.bumm.de/index-e.html?docu/320e.htm (this one stays lit long after the wheels stop turning – great at junctions/crosswalks.

    Combined with my new messenger bag – http://www.howies.co.uk/product.php/1798/92/ – I’m amazingly seeable (is that a word?!) at night, despite my penchant for black cycling gear (http://www.bikemagic.com/news/article/mps/uan/4437)!


  • antbikemike says:

    The B&M IQ Fly Cyo R N plus [long name!] is the best light I have ever used and install it on every single bike I sell.
    I used to use the IQ Fly, but this one is even better.

  • DrMekon says:

    I have a 60 lux Cyo (rather than the nearfield 40lux version in the picture). It really does the business for riding at night, but I leave it on all the time. Although it doesn’t dazzle (for the reason Alan mentioned) the light is so bright, it makes drivers give you a second look, which is all good in my book. I also have an IQ Ixon, and the Cyo is the best of the two.

  • Jon says:


    For those with the normal CYO with 60 lumens — if i want more nearfield visibility for slow riding, can’t i just lower the beam of the wheel closer to my bike?

  • Alan says:


    Certainly that would work fine, though you’d also be placing the rest of the beam closer to the bike. In other words, regardless of where they’re aimed on the road, the 60 lux version has a shorter beam and the 40 lux version has a longer (taller) beam.

  • Jon says:

    Thanks Alan, do you think the normal or the n is better for touring?

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