Mounting a Busch & Muller Lumotec IQ Cyo Senso Plus

Bush & Muller Lumotec IQ Cyo Senso Plus

Bush & Muller Lumotec IQ Cyo Senso Plus

I had a little fun and games with the mounting of a Busch & Muller Lumotec IQ Cyo Senso Plus without reflector (model no. 175QCSNDi) on my Surly Long Haul Trucker which is fitted with SKS Chromoplastic P50 mudguards and the standard cantilever brakes. I had been under the impression that the mounting bracket that came with the Lumotec IQ Cyo Senso Plus was suitable for cantilever brakes. I was wrong. Why does Busch & Muller not provide a lot more clarity on mounting the lights is beyond me. A search via Google was not that helpful either so I hope that this post is useful to others.

My thanks to Baalzamon at the Australian Cycling Forums for his suggestion how to mount the light, even if it only proves to be a short-term fix.

The Problem

 Lumotec IQ Cyo Senso Plus Mount Interferes with the Cantilever Brakes

Lumotec IQ Cyo Senso Plus Mount Interferes with the Cantilever Brakes

 Lumotec IQ Cyo Senso Plus Mount Interferes with the Cantilever Brakes

Lumotec IQ Cyo Senso Plus Mount Interferes with the Cantilever Brakes

The problem, for me at least, is that the standard mount that comes with the Lumotec IQ Cyo Senso Plus means that the mounting bracket interferes with the hanger wire of the cantilever front brakes, making the mount as supplied useless.

Possible mounting solution?

Possible Mounting Solution?

One possible solution I thought of was to temporally mount the light off the cantilever brake mounting post. However I would have needed a longer bolt and secondly the light interferes with the mudguard meaning it would have to be mounted on tilt. Not really ideal, even as a short term solution.

The Solution

B and m dynamo reinforced front headlamp bracket for cantilever brakes bmd25 IMG4667

Busch & Muller BMD25 mounting bracket

I am was looking for a short term fix as I wanted to use the bike with the light and it would take at least a week, if not longer to get a proper Busch & Muller mounting bracket such as the BMD25 from SJS Cycles.

 Busch & Muller Lumotec IQ Cyo Senso Plus Mounting Solution

Busch & Muller Lumotec IQ Cyo Senso Plus Mounting Solution

Well after speaking to Baalzamon I have mounted the light using the supplied mounting bracket and a 6 mm x 90 mm bolt with a couple of extra nuts and washers to “lock” the mount into a position in front of the cantilever brakes. I am not sure how well this will work out longer term but I will give a try on a four day mixed road conditions ride coming up and then make a decision on whether to spend the mullah on a BMD25 for a more professional looking solution.

Edit: February 14, 2013: Well I have done over 3,000 kilometres now with this setup including a good 1,000 kilometres plus of dirt roads, which seemed to be forever corrugated and it is still holding up well so I haven’t made any changes to the mount.

In the meantime I hope this post helps others out who may find themselves in the same situation.

7 Responses to Mounting a Busch & Muller Lumotec IQ Cyo Senso Plus

  1. rob campbell 21 October 2012 at 2:56 AM #

    I, for one, appreciate you posting this! Mission accomplished. I have the same issue. How has this worked out for you over time?

    • Aushiker 21 October 2012 at 9:19 AM #

      Happy to help Rob. I have used this bike with the light mounted this way for over 3,000 km now including 1,000 + km of dirt roads (read corrugations) and it has held together nicely. My biggest issue has been my handlebar bag drooping down blocking the light a bit rather than the mount itself.

  2. pete jones 30 October 2012 at 11:45 PM #

    hi there,
    Just came across your website….love it!
    just finished a total re-build in a 1988 Rockhopper, had exactly the same problem with my Philips saferide dynamo light getting in the way of the brake cable, however, there’s a reflector built onto the mount bracket of the safe ride, and removing that allowed the cable to slip between the arms of the bracket.

    I’m surprised you don’t get any vibration problems with a long extension like that, I had to make an extended bracket to fit from the rear of the fork on my On One Pompetamine to hold the light ( no hole drilled through the fork crown, just a captive threaded hole on the back for a mudguard ) and even though it was pretty heavy gauge, it vibrated like crazy, and cracked after about 600 miles. Maybe the Philips light’s heavier than the B&M?
    In the end I took a power drill to the fork crown and drilled and tapped a M6 thread, no problems since.
    Cheers….Pete; Sheffield England

    • Aushiker 31 October 2012 at 8:37 AM #

      Thanks Pete for your comments. I am not that familiar with the Philips Saferide but it may be as you suggest a little heavier. How are you finding it as a light?

      The Busch & Muller Lumotec IQ Cyo mounting that I have done seems to have worked out so far. I have done over 3,000 km with it now without any issues. As far as I can tell it is not vibrating, well not enough for me to notice it whilst riding along. Durability maybe an issue down the track but so given your thoughts I will make sure I keep a closer eye on it.

  3. jonk 15 March 2013 at 10:43 AM #

    Just wanted to post my appreciation for your diy mounting fix. I did this in later October as a way to mount a B&M IXON LED-IQ and it worked wonderfully. Over the last 4 1/2 months and about 2500 miles I had no problems, though I was initially concerned because about 1/3 of my commute is on a particularly bumpy stretch of path. The light wouldn’t vibrate along that stretch so much as gently bob. Well, this morning I heard something fall off my bike and turned around to find my light on the ground. The bolt had sheared right in half, just beyond the nut that is closest to the fork crown. Oh well, it was a great hack while it lasted. I think I’ll try the B&M LT163 next. And apparently I’ll need to stock up as longevity may be a weakness with it, too.

    • Andrew Priest 22 March 2013 at 2:33 PM #

      Sorry to hear of the failure. I have been lucky so far but will keep a close on eye on the bolt and will probably go down a similar path yourself if it fails.


  1. Busch & Muller Lumotec IQ Cyo Senso Plus Light Owner Review | Aushiker - 26 April 2013

    […] is about the Busch & Muller Lumotec IQ Cyo Senso Plus front light, model number 175QCSNDi, its installation and my first impressions. Once I have had some decent night use of the light I will update the blog […]

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