Monoforks

DIscuss anything relating to non-standard cycles and their equipment.
belgiangoth
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Monoforks

Postby belgiangoth » 28 May 2018, 3:22pm

I love the idea of monoforks on a laidback. They look super-cool and they have the additional benefit of adding a touch of Mike Burrows to your bike. I am not really convinced by their application though, especially on a low/semi-low racer type bike.
There's an Aero advantage and they have greater stiffness than a single fork, but as there is no "triangulation" they will have less lateral stiffness, so could just as well lose the power they save by being aero. I wonder whether their sideways compliance might confer some comfort advantages though - quasi suspension?
For that matter, another advantage of them is halving the mass of suspension tools in the fork by having only a single suspension. But I don't think they make suspension 20" wheel monoforks. You could get leftys for a high racer though, but then they would need less suspension.
Finally the big argument of ease of tyre repair - I don't think the front wheel is tricky to remove to fix a tyre, it's the back one that's the issue.
Are there any mono-rear bikes out there, or possible adaptations?
If I had a baby elephant I would let it sleep in the garage in place of the car. If I had either a garage or a car. (I miss sigs about baby elephants)

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[XAP]Bob
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Re: Monoforks

Postby [XAP]Bob » 28 May 2018, 3:35pm

Think MB's latest was mono fork both ends - it was a straight frame with the wheels on the left at both ends...
Trike wise the wind cheetah has a cantilevered rear wheel, as do some of the earlier Alleweders.
A shortcut has to be a challenge, otherwise it would just be the way. No situation is so dire that panic cannot make it worse.
There are two kinds of people in this world: those can extrapolate from incomplete data.

atlas_shrugged
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Re: Monoforks

Postby atlas_shrugged » 28 May 2018, 5:28pm

I cannot remember if MB has a mono fork on the rear of his bike.
https://www.flickr.com/photos/recumbents/41336650131/

He does not seem to loose much power from any extra flexing of the mono fork. This based on the speed that he seems to be overtaking these days. He always points out that pedals are only fixed on at one point i.e. cantilevered.

UpWrong
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Re: Monoforks

Postby UpWrong » 28 May 2018, 6:02pm

Check out the Wolf and Wolf, https://www.wolfundwolf.ch/ch/liegerad/

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squeaker
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Re: Monoforks

Postby squeaker » 29 May 2018, 10:07am

belgiangoth wrote:I am not really convinced by their application though, especially on a low/semi-low racer type bike.
The Wolf and Wolf tourer linked above shows the benefit in terms of chainline past the front forks ;)
"42"

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pjclinch
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Re: Monoforks

Postby pjclinch » 29 May 2018, 12:16pm

The less lateral stiffness triangulation thing is a non-issue really. It works fine on a car, 40 tonne truck, 8-Freight cargo bike and every set of cranks/pedals you can buy.

Single sided rears are a standard Burrowsism. The 8Freight, Windcheetah, Lotus 108, Ratracer, 2D etc. all have monostay rears.

The main downside seems to be it's not obvious how to mount a hub gear. The main reason to keep on with two sided wheel mounts is innate conservatism. A good case in point was the Giant Halfway folder, which I think did better in the market after it was downgraded to a standard fork.

Pete.
Often seen riding a bike around Dundee...

mark aldridge
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Re: Monoforks

Postby mark aldridge » 29 May 2018, 4:19pm

Hello Pete
I am currently running a Burrows Fujin special from Bikefix and finding it all I ever want from a fast audax style recumbent. I went for the monofork more because I wanted the very neat Burrows steering tiller and got the mono-fork as a bonus. I can't really say I notice any riding advantage but it holds the wheel to the frame, what more do you want.

I have run a Windcheetah or two for years and find them my go-to machines for fun riding. The all round mono-stays do make puncture repair a doddle though.

A few years ago I had a test ride on a Velomo Hi Trike TT and instantly placed an order. If you can imagine a full suspension Windcheetah you are not far off. Coming from a very small scale builder it is a bit rough at the edges but it is one of the best riding trikes I have ever ridden and I would not hesitate in buying another. The only negative is the nigh on impossibility of fitting mudguards. For me it is definitely a keeper with the bonus of all round monostays.

Mark

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squeaker
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Re: Monoforks

Postby squeaker » 30 May 2018, 5:06pm

squeaker wrote:The Wolf and Wolf tourer linked above shows the benefit in terms of chainline past the front forks ;)

As you can see here with a Big Apple tyre
WandWmonoFork.jpg
"42"

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Cunobelin
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Re: Monoforks

Postby Cunobelin » 30 May 2018, 5:37pm

All trikes, without exception use his principle quite happily

belgiangoth
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Re: Monoforks

Postby belgiangoth » 30 May 2018, 8:42pm

I'm not saying they don't work, I'm saying that they don't appear to offer a significant advantage - especially since there are no suspension monoforks for small wheels.
If I had a baby elephant I would let it sleep in the garage in place of the car. If I had either a garage or a car. (I miss sigs about baby elephants)

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Cunobelin
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Re: Monoforks

Postby Cunobelin » 31 May 2018, 9:13am

The market is fickle

When MB joined Giant, his first commercial foray was the "Halfway"

Single sided forks and rear triangle

Image


Did not last long before a more standard design was alongside and then replaced the original, although I do believe you can still get the mono blade version
Last edited by Cunobelin on 31 May 2018, 9:19am, edited 1 time in total.

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[XAP]Bob
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Re: Monoforks

Postby [XAP]Bob » 31 May 2018, 9:17am

Monoforks *and* rim brakes..
A shortcut has to be a challenge, otherwise it would just be the way. No situation is so dire that panic cannot make it worse.
There are two kinds of people in this world: those can extrapolate from incomplete data.

StephenW
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Re: Monoforks

Postby StephenW » 3 Jun 2018, 10:22pm

In some case "rigid" forks have a certain amount of flex designed into them to give a more comfy ride, don't they? Perhaps it is harder to have this desirable flex without having undesirable flex when you have a monofork?