Brompton dynohub lighting

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speedsixdave
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Joined: 19 Apr 2007, 1:48pm
Location: Nottingham, UK

Brompton dynohub lighting

Postby speedsixdave » 9 Jan 2021, 11:03am

Hi all,

There's a Significant Birthday coming up for my London-dwelling brother shortly and after consultation I've said I would get him a dynohub lighting setup for his Brompton, which he describes as 'very old'. Other than the 74mm OLD front hub, are there any other major pitfalls or constraints to a dynamo system on a Brommie? I have fitted dynamo systems on at least six bikes so happy with the concept generally, but I don't have a lot of Brompton experience and in the current climate I'm doing all this remotely so less opportunity to offer up parts and see how they fit.

I'm thinking the Brompton-specific SON XS hub on a suitable rim, a B&M IQ-XS front light and perhaps the Brompton rear light unless anyone has better suggestions.
Big wheels good, small wheels better.
Two saddles best!

Brucey
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Re: Brompton dynohub lighting

Postby Brucey » 9 Jan 2021, 11:13am

I guess it might make a difference if there is rack fitted or not?

cheers
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speedsixdave
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Joined: 19 Apr 2007, 1:48pm
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Re: Brompton dynohub lighting

Postby speedsixdave » 9 Jan 2021, 11:47am

Brucey wrote:I guess it might make a difference if there is rack fitted or not?

cheers


Yes good thinking - I will inquire.
Big wheels good, small wheels better.

Two saddles best!

Brucey
Posts: 42102
Joined: 4 Jan 2012, 6:25pm

Re: Brompton dynohub lighting

Postby Brucey » 9 Jan 2021, 12:30pm

in a similar vein if a bag is fitted to the luggage block at the front, it is normally high enough that there is room for a small light beneath it. But this isn't guaranteed to be the case...?

Another thought is that current Brompton rims are slightly different from older ones; some folk don't even notice this, but others like everything to match perfectly and might not be happy with 'odd wheel rims'. Of course drawing attention to this possibility does increase the chances of it happening…?

cheers
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SA_SA_SA
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Re: Brompton dynohub lighting

Postby SA_SA_SA » 9 Jan 2021, 1:22pm

Is there a reason you wouldn't just buy a Brompton official off the shelf Sp dyno wheel and suitable Brompton fitting lights of choice?

Nb I don't think the rear Spanninga solo lamp is a good idea on a rackless(L) brompton , as the mudguard obscures the low Led light strip (as can be seen in brilliantbikes.co.uk videos).
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speedsixdave
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Joined: 19 Apr 2007, 1:48pm
Location: Nottingham, UK

Re: Brompton dynohub lighting

Postby speedsixdave » 9 Jan 2021, 5:44pm

SA_SA_SA wrote:Is there a reason you wouldn't just buy a Brompton official off the shelf Sp dyno wheel and suitable Brompton fitting lights of choice?


Not really, just the quest for perfection! It's a 50th birthday present and he does commute and ride in the dark, so I'm happy to cough up the cash for the most reliable kit. I'd happily buy the SP for myself (I have one on a Moulton) but am tempted by the German wonderment of the SON as a thing that will hopefully see him lit up for the next 50 years. Having said that, I do think the plastic connector on the SP and Shimano hubs is significantly more user-friendly than the flat tabs on the SON.
Big wheels good, small wheels better.

Two saddles best!