Functional bikes. Not Porn not Anti

Really? Unless you're powering something other than a front and rear light, the extra weight of the second dynamo would be pointless.

One dynamo hub would provide adequate power.

Sound like a good ideas, but not really necessary, just add more complications.

Easy enough to route a cable to a waterproof connection on the bike.

That steerer lock's a good idea in theory but does it mean you need to lock the front wheel straight ahead? I find it's often necessary to bend the wheel in some way to get it close enough to the post/fence/stand to lock it.

Quite useful if you're popping into a shop to grab some drink, a modern version of this.

Someone did a version using a mini d-lock a couple of years ago at NAHBS. Lock went from the top tube to the steerer so as well as locking it in place you could lock it to a small post.

Pereira Cycles, I liked the idea, but not very useful in cities IMHO.

He build it for the Oregon Technical Trial which have a set of requirement and test that it need to pass (point are removed for any fault and time limit).

He build it for the Oregon Technical Trial which have a set of requirement and test that it need to pass (point are removed for any fault and time limit).

Any more info about this? Google gives me nothing. Reminds me of thoe hikes we used to do at cubs. I once got a massive penalty for wearing jeans. They were right to do it.

Wealth of information on Technical Trials in general.

My mistake, I forget to add Oregon Manifest Technical Trials which make searching much easier.

This bike was the winner in the 2011 Manifest, the one I posted originally was the 2nd generation requested by a customer, the front rack were build like that to absorb the vibration as well as allowing the fork blade to flex (the main disadvantage of the porteur rack is that it doesn't allowed the fork blade to flex much) it turn out to be more crumblesome than originally thought, a perfect example of what go on during the Manifest as the scenario created allowed the framebuilder to assess their own work and find out the limitation and a way to get around it (in the case of Pereira, the 2nd generation version above);

I wasn't quite keen on the 2012 version as it's seemed more eccentric than useful, which slightly defeated the whole point of the Technical Trials, this is one example;

Winner of the 2012 (Pereira Cycles again);

Wow - great reading there ed.

A beer fiets from Holland I bet. I followed one of them recently just outside Rotterdam...

imagine the Health and Safety outcry here !!!

would be fucking awsum for a night out.

I actually saw one on the road near Kentish Town last weekend!

One thing I just thought is why not have a dynohub on the trailer and then you can have another rear light on the trailer itself.

Really? Unless you're powering something other than a front and rear light, the extra weight of the second dynamo would be pointless.
One dynamo hub would provide adequate power.

Well you would be. My idea was powering a rear light on the trailer - in case you were carrying higher cargo, or just wanted another light on the closest part of the bike to the vehicle behind you. Especially as that light seems relatively low. One dynamo wouldn't be sufficient to power a front, rear, *and *another rear. You would have to use a higher wattage bulb for the rear, or you could have two lights. I think the bigger issue would be making sure you got hold of a dynamo optimised for such a little wheel. It's been a while since I used one, but when I was looking to build mine I remember reading that different ones were designed for 26" and 700c.

The weight as a % of the whole build + cargo wouldn't be that great.

Easy enough to route a cable to a waterproof connection on the bike.

Definitely. That's sort of what made me think about having a dyno hub in the trailer though so you wouldn't have any additional visual cables, or worries about routing.

Anyway it was just an additional idea to add to a very nice functional skills-show-case-type bike. Some really lovely ATD.

There's a dynamo hubs designed for 20" wheels that could be used, but they're the expensive variation that make the whole thing exaggerated (£250-300 just to power a back light), whether just adding a mount for a battery light would sufficent.

Found this for $100 thought;

http://www.thinkbiologic.com/products/joule-ii-dynamo-hub-20-wheel-set

^^ that bike is hardly about providing design solutions at a price point though is it?

;)

The Reelight magnetic light would be a better choice.

balloon

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Just doing some reading on trailers - x1 wheel Vs x2 wheels, etc.

Here a couple of links I thought was interesting:
http://valdodge.com/2009/07/04/custom-bike-trailer/

http://bicycles.stackexchange.com/questions/394/one-vs-two-wheeled-bike-trailers

Well you would be. My idea was powering a rear light on the trailer - in case you were carrying higher cargo, or just wanted another light on the closest part of the bike to the vehicle behind you. Especially as that light seems relatively low.

Yeah I understood why you wanted a second light, when I said powering anything other than lights I meant things like GPS/Mobiles/cameras etc.

One dynamo wouldn't be sufficient to power a front, rear, *and *another rear.
Is this true? They handle a front+rear fine so I assumed another rear would be okay but I'd be interested to hear if not.

You would have to use a higher wattage bulb for the rear,
How come more than normal?

I think the bigger issue would be making sure you got hold of a dynamo optimised for such a little wheel. It's been a while since I used one, but when I was looking to build mine I remember reading that different ones were designed for 26" and 700c.
A widely available option for little wheels is THIS

"Originally designed for 20" wheels"

The weight as a % of the whole build + cargo wouldn't be that great.
Definitely. That's sort of what made me think about having a dyno hub in the trailer though so you wouldn't have any additional visual cables, or worries about routing.
And to be honest, teh simplest most practical solution, if weight is not an issue with a cargo bike, is to stick a normal light on the rear and carry a few batteries. Hey presto you'll never be caught out and will save you a shitload of money you didn't waste on another dynamo hub

Really liked this idea with the cable, so as to not have to set up gears and brakes every time you decide to split the frame

how does it work?

magnets

You just unscrew it.

Used to have the same on the Moulton, just make sure you don't cross the wrong cable, I managed to lock the rear wheel when trying to shift the chain.

This is much more elegant, and the O-ring now come in different colour to prevent mixing them;