What's the best way to mount an LED headlight (Busch & Müller Eyc) on a brake boss? Do I need a special mount or what? Thanks. [h=1][/h]

I would probably just use a couple of stout washers and maybe a longer bolt. There are various mounts available from B&M, I'm not sure they would work any better. You can't mount at the crown?

unterhausen's link has pretty much everything one would need.

Are you talking about a canti brake boss or a standard caliper hole? Is there a particular issue you're having mounting the lamp?

That's where it is at the moment, but one of the things I like about this bike (Circe Omnis+ tandem) is that I can use my Brompton T-bag on it. Unfortunately, the T-bag covers anything mounted at the crown. The bike has disc brakes, and there are two unused cantilever brake mounts on the fork just begging me to mount the light on one of them .

Here's photo:



Edited to add: It looks like I'd have to order two parts from Peter White: a Cronometro Nob and a special handlebar bracket he sells. I'm in Europe and would have to have those parts shipped over from the States--if he were willing to ship abroad. There must be another way.

got it. If you can get some thick 6mm washers, then I would just put one on either side of the existing mount. Something like the Brompton mount would work well, that's what I have been using on one of my bikes.

There isn't a lot of mating surface, would probably be better if you put a bushing on the brake boss, but that's starting to be a project

I'm trying to picture that in my mind. Do you (or anyone else) happen to have a photo of a light mounted that way?

First a quick question: do you ever intend to use that canti boss for a brake?

I ask because they are very easy to permanently damage by applying too much torque to the bolt that is normally used to secure the brake. I have a B&M Cyo lamp and it requires a respectable amount of torque to the mounting bolt to keep it stable, but mine is mounted normally to the fork crown.

Also, I think you can get the knob and handlebar mount in Europe since I think Peter imports them anyway, though I'm of no use to suggest any retailers.

No, I'm happy with the disc brakes.

I've also found out that Topeak makes a bracket for mounting lights directly to the fork.

QBP Problem Solvers Brake stud Mount LT0901
+ the afore-mentioned Schmidt Part#: SCH75532 handlebar mount gripping around it. perhaps ?

I use the ' Schmidt headlight mount for Brompton fork crown, stainless:' in mounting an Eyc on my Brompton.

you could fabricate something yourself [bend a L bracket with a hole, each, for 2 bolts] ..
But this forum seems to prefer seeing shopping links..

People get Surly Bikes over there so there must be a QBP distributing importer to Europe.

here's German B&M via UK https://www.sjscycles.co.uk/busch-and...33640/?geoc=us

https://www.sjscycles.co.uk/schmidt-h...23929/?geoc=us

didn't have a fork handy, so I just used a loose canti braze on. The connection is really solid, even without using a wrench to tighten down the bolt
If the light was any bigger, I suppose it would be difficult to have it oriented the right way without hitting the tire, but with this light there wouldn't be a problem.


IMAG0412 by unterhausen, on Flickr

IMAG0413 by unterhausen, on Flickr

Thanks to all for the help, and especially to Unterhausen for taking the time to post those photos. I think I get it now. That looks like quite an elegant solution and, best of all, it doesn't require buying any special parts.