Dynamos - obsolete?

[Bob]

>a) It's a 700C tandem, so the cost of getting a hub dynamo would be very
>high and I'm not sure I would be happy with 36H wheels.

When I bought my 700C hub dynamo, there didn't seem to be much
difference in price between a 36 spoke and a 48 spoke, so I went for a
48 so I could use it in my tandem in the future. Though my normal front
tandem wheel is only 36 spoke anyway. I would always insist on 48
spokes on the rear (esp with dished derailleur wheels), but front 36
hole wheels are very strong (so why did I get a heavier 48 spoke?).

 

[Tim Hall]

On 23 Dec 2005 09:50:28 GMT, [email protected] (Arthur Clune) wrote:

>Tim Hall wrote:
>
>>
>> This is true. However as I used the photoswitch in my B&M light, I've
>> got the Shimano one going spare. I'll stick it in the post to anyone
>> that wants it. (assuming I can find it. I think it's in the kitchen,
>> by the radio.)
>
>I'd like it if the offer is still open. My phtoswitch died a while back.

Found it. It's labelled Nexus on the front and SW-NX30 on the back.
Drop me an email with your postal address on it and I'll try and find
an envelope.

timhall at clara dot co dot uk.



Tim

 

[Clive George]

"Bob" <[email protected]> wrote in message
news:[email protected]...
> >a) It's a 700C tandem, so the cost of getting a hub dynamo would be very
>>high and I'm not sure I would be happy with 36H wheels.
>
> When I bought my 700C hub dynamo, there didn't seem to be much
> difference in price between a 36 spoke and a 48 spoke, so I went for a
> 48 so I could use it in my tandem in the future. Though my normal front
> tandem wheel is only 36 spoke anyway. I would always insist on 48
> spokes on the rear (esp with dished derailleur wheels), but front 36
> hole wheels are very strong (so why did I get a heavier 48 spoke?).

All our tandem wheels are 36H nowadays - but then they're 26", not 700, and
have quite big tyres.
(9sp, 135mm OLD, so there is dish)

cheers,
clive

 

[James Annan]

Peter Clinch wrote:
> James Annan wrote:
>
>> b) with some steep unlit hills with poor road surfaces, I'm not
>> convinced that the standard 3W would be adeqate - unless the beam
>> pattern is really very very good.
>
>
> The new B&M LED has relatively good output at low speeds as one of its
> marketing bullet points. Not tried it personally, but having chuntered
> up pathetic surfaces (the lane we stay on is basically landrover track
> standard, and a hill) at low speeds on the 'bent with a SON running the
> standard halogen I know it's not completely untenable. As long as the
> track isn't so awful as to need micro-routefinding spotted out from
> ahead I find it works okay.


It's outrunning it on the downhills I'm worried about!

I'm relieved that Clive - who we've ridden with - didn't suggest we
would be slow enough up hills to shut down a dynamo


James
--
James Annan
see web pages for email
http://www.ne.jp/asahi/julesandjames/home/
http://julesandjames.blogspot.com/

 

[M-gineering]

Bob wrote:
> Has anyone tried a 12v dynamo (eg Busch & Muller Dymotec S12 bottle)
> Though £200 for a bottle dynamo seems a bit much!
>
> I thought I saw a 12v SON hub in a magazine a year or two ago, but I
> can't find any trace of them now. Did I imagine it?
>
Any decent dynohub will churn out 12v (or 220v for that matter) if you
fit the proper bulb(s) and turn the hub fast enough.

--
---
Marten Gerritsen

INFOapestaartjeM-GINEERINGpuntNL
www.m-gineering.nl