Running a B+M Cyo light upside down?

Trikeyohreilly · Post by **Trikeyohreilly** » 11 Jul 2018, 6:38pm

Hi, can anyone see any issues with running a Lumotec IQ Cyo upside down? Its due to mounting issues.

Thanks

andrew_s · Post by **andrew_s** » 11 Jul 2018, 7:09pm

It won't be any good.
The beam pattern will be all wrong, with lots of light by your front wheel, dazzled motorists and not much up the road, or, if you tip it up, nothing close to the bike, dazzled motorists and well lit trees.

The IQ-X is usable below the mount, as the mount is on a ring that can be moved round the light, and there are upside down versions of the SON Edelux

gregoryoftours · Post by **gregoryoftours** » 12 Jul 2018, 8:37pm

What Andrew s said, plus it will be even less water resistant than it already would be the right way up (assuming you'd be using it with mudguards).

Greystoke · Post by **Greystoke** » 12 Jul 2018, 9:44pm

Proper cycle lamps have asymmetric beams like a cars dipped beam with a cutoff to prevent dazzle. They can only be used one way up. A torch has a symmetric beam and can be used any way round.

Cyril Haearn · Post by **Cyril Haearn** » 12 Jul 2018, 9:54pm

Could the bracket be modified so the light is the right way up?

lescargo · Post by **lescargo** » 12 Jul 2018, 10:45pm

Can't be first time for this problem; someone on this site will have sorted it!
Possible solution?
50+ years ago, for bikes without "lamp bracket boss" we fitted the lamp bracket
on front spindle.
If you do have lamp boss I have, somewhere among the post PBP spares, an adaptor to fit two lights on one boss
which would allow you to move light probably 2" out from fork?
Recently there was a version which fastenned on stem bolts in for sale section; cheap, £7 I think.
If I'd still been a real cyclist I would have bought it!

freiston · Post by **freiston** » 13 Jul 2018, 4:12pm

There must be a solution - any chance of posting a picture of the front end of the bike and describing what the mounting issue is? That way someone might come up with a (possibly elegant) solution.

andrew_s · Post by **andrew_s** » 13 Jul 2018, 7:23pm

To use a Cyo, you've got to do something like this:

.
Note that the light itself is the right way up.

One of these brackets will allow the light to be a short distance below the handlebars
https://www.sjscycles.co.uk/lighting-sp ... headlight/

Trikeyohreilly · Post by **Trikeyohreilly** » 14 Jul 2018, 4:45pm

Very interesting. Thank you.

I'd love to post a few photos but it seems more difficult than ever these days. There was a post about how to but I can't see it now.

I'm not sure about the beam pattern, but totally take you word for it. The light would be only about 18 inches from the ground which may make it worse for all I know. But together with the waterproofing it's clearly a bad idea.

If 18 inches above the ground isn't terrible I'll have to tinker a bit to make something. Plus look into the photos. Thanks

Greystoke · Post by **Greystoke** » 14 Jul 2018, 5:18pm

Lights designed to pass the German regulations are designed to optimize the beam above the wheel.

the snail · Post by **the snail** » 14 Jul 2018, 5:43pm

B&M make a few mounts for their lights, probably one will work,
e.g.
https://www.sjscycles.co.uk/lighting-sp ... g-bracket/

Post by **Mick F** » 14 Jul 2018, 6:23pm

The trouble is, they're black - and only black.

Cycling UK Forum

Running a B+M Cyo light upside down?

Running a B+M Cyo light upside down?

Re: Running a B+M Cyo light upside down?

Re: Running a B+M Cyo light upside down?

Re: Running a B+M Cyo light upside down?

Re: Running a B+M Cyo light upside down?

Re: Running a B+M Cyo light upside down?

Re: Running a B+M Cyo light upside down?

Re: Running a B+M Cyo light upside down?

Re: Running a B+M Cyo light upside down?

Re: Running a B+M Cyo light upside down?

Re: Running a B+M Cyo light upside down?

Re: Running a B+M Cyo light upside down?