Searched that amazing rim dynamo: looks very interesting.
CityCyclingEdinburgh Forum » Questions/Support/Help
hub dynamo - advice/recommendations?
(111 posts)- Started 9 years ago by unhurt
- Latest reply from Frenchy
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resolved
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Posted 9 years ago #
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Thanks for the responses. Unfortunately the hub DaveC recommended only handles centre lock disc and as mine are all 6 bolt it wouldn't fit anyway.
Posted 9 years ago # -
@acsimpson, are you running 26" wheels or 700c?
This wheel might suit if the former:
http://www.ebay.co.uk/itm/26-Wheel-Rear-Wheel-Shimano-XT-6-hole-Mavic-XM319-disc-black-/371440072725
Or this if the latter:
Or get a wheel built around this hub:
http://www.rosebikes.co.uk/article/shimano-hub-dynamo-dh-3d30-disc/aid:196617
Posted 9 years ago # -
Anyone want to recommend a dynamo front light? Preferably one bright enough for the WoL pathway from Colinton to Balerno...
Posted 9 years ago # -
B+M Cyo. Several versions. Rose Bike or BikeDiscount.de
Other retailers etc...Posted 9 years ago # -
Thanks Crowriver. I have a couple of rims and living near Mr Hart plan to get one built. I'll need to check the spoke count on the rims and wait for that one to come back into stock.
(Incidentally, they are 700c)
Posted 9 years ago # -
So far as I can see the 1.5w dynamo produces 250ma with a modern emitter thats going to be about 40 lumems per emitter drawing about 2.7v each.
So at about £20 lighter than a 3w dynamo you'd get ~80 lumens with a twin Cree XML set up. Plenty bright enough for city riding and fairly slow unlit roads.
But for that £20 you could near double the light output.
Posted 9 years ago # -
ACS said "Unfortunately the hub DaveC recommended only handles centre lock disc and as mine are all 6 bolt it wouldn't fit anyway."
Well I found the same problem but then I found these:
http://www.rosebikes.com/products/bike-components/brakes/brake-discs/brake-discs/
Centreloch (scottish version) rotors start from £4.78! for Pete's sake! This way you can leave the rotor on if you wish, while not using the wheel.
I'd advise getting the centrelock rotors which have the metal centre interface as close to the centre as possible! I have BB7 brakes on my Bent and found my centre lock rotor clashed with the arms which stick out, and I had to cut the arms off with a hacksaw. That said, don't let that diswayde you, centrelocks are simple to use.
This:
http://www.rosebikes.co.uk/article/xtreme-hgig-sprocket-removal-tool-23246/aid:23248
is useful for removing the cassette and also useful for undoing the disk lock ring.
Posted 9 years ago # -
Anyone want to recommend a dynamo front light? Preferably one bright enough for the WoL pathway from Colinton to Balerno...
Although you don't go as fast on the WoL as on the road, if anything you need a brighter light as the mud just sucks up photons... I would say that you might be happy with a 60 lux light, but probably worth going for an 80 lux (Cyo Premium etc.)
Posted 9 years ago # -
@unhurt
Re lights, this is the one I plumped for last year, which seemed to be at roughly the price/performance sweet spot:
http://www.rosebikes.com/article/b--m-lumotec-iq-cyo-premium-t--senso-plus-front-headlamp/aid:709237
Bright enough for unlit paths and roads, with an excellent beam pattern.
Posted 9 years ago # -
@DaveC, Thanks. Now I just need to build up a Christmas list of the parts needed.
Posted 9 years ago # -
Thanks for all of the information so far. Building a winter wheel with a 3W dynamo is starting to feel like the way to go...
Posted 9 years ago # -
@jdanielp
Get the spokes and hub and I'll build you the wheel for fun. (When I build a wheel it stays built.)
Posted 9 years ago # -
@laidback and panyagua - hmm, two recs for the B+M Cyo? I am convinced!
Posted 9 years ago # -
Sounds convincing but for those of us without a hole in the forks crown how easy would it be to adapt for handlebar mounting?
Posted 9 years ago # -
@acsimpson, SJS Cycles sell a range of brackets and adapters. Maybe this one would suit?
Posted 9 years ago # -
bah. unimpressed to get an email from reelights saying they made a 'mistake' on their kickstarter and forgot to charge us postage.
Posted 9 years ago # -
Hopefully the bloke who asked me about dynamos outside Lidl (Kirkgate) will find his way to CCE, then here. I forgot to mention the site and didn't have a pen to leave a note on his bike.
Posted 8 years ago # -
So, it's time to talk to me about dynamo lights.
The tandem's front wheel has a few broken spokes and will need to be rebuilt.
Should I just jump to the chase and switch to dynamo lighting?
Assume I know nothing (which is pretty much true).
I should say that the tandem has 20 inch wheels and disc brakes, which I assume will make a difference.
Posted 8 years ago # -
I think most dynamos are rated for 26" or 700c, so are a suboptimal choice for 20".
That said, few manufacturers care, except SON who have a 20" version of their hub.
It may not matter for modern lighting, but it may well matter for charging USB devices, so might be worth checking properly (i.e. not relying on my recollections!) if you're concerned.
Robert
Posted 8 years ago # -
most dynamos are rated for 26" or 700c, so are a suboptimal choice for 20"
HankChief has never needed an excuse to go faster....
Posted 8 years ago # -
most dynamos are rated for 26" or 700c, so are a suboptimal choice for 20"
HankChief has never needed an excuse to go faster, but....
Posted 8 years ago # -
Good point. I didn't think about revolution speed.
I would say that whilst I'll be doing 30% more revolutions for the same speed, I'm likely to be doing much less than 30% lower than 'normal' speeds.
I have a monkey light which gives a pattern on my front wheel if I'm doing more than 10mph.
That's about my maximum on the flat when fully loaded and on studded tyres, so a good measure to aim for.
Posted 8 years ago # -
Thenbrompton I have been using this weekend has wee wheels and a bottle type dymamo. Noisy. But lights are good.
Posted 8 years ago # -
Both SP and Schmidt make dynohubs designed for 20" wheels.
Posted 8 years ago # -
I used to get though a couple of bottle dynamos a year. The bearings aren't very sophisticated and on a Brompton they are close to the ground. They would seize up and stop turning. I gave in and got a SON but needed Ben to widen the forks as they didn't make a narrow one back in '02.
Schmidt now say that the low drag (small wheel) version is OK for big wheels if you're using LED lights.
Posted 8 years ago # -
If I can fold it neatly into an IKEA bag I may take the Brompton as luggage when i take the electric bike back tomorrow. Top sped on the lecky so far is 20.5 mph I have some sturdy bungee cords and the rack on the lecky bike is oversized tubing.
Posted 8 years ago # -
They fit in a DIMPA bag.
Posted 8 years ago # -
Nice bag, I just have a big blue carrier bag from IKEA, will test.
Posted 8 years ago # -
Finally figured how to fold the thing properly. First go this morning. Slightly late for the folding competition. Fortunately it was more an unfolding competition.
Fits in the blue IKEA bag should I go to work on the bus. Unlikely. Too heavy to strap on the rack, shame as never used the bungee straps.
Posted 8 years ago #
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