Funded! This project was successfully funded on May 15, 2013.

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Reinventing the 20" bicycle wheel: for maximum comfort over bumps and less vibration from the road, even on a folding bike.

The project

Yep, this project is about reinventing the wheel.  But don't let that put you off - this is serious!!  I have spent much of the last four years developing bicycle wheels with integral suspension.  

We are at the final push now: I need your help to take our fully-functioning and tested prototype 20" front and rear bicycle wheels into production. 

We showed our loopwheels for the first time in public at the Bespoked Bicycle show in Bristol 12-14 April 2013. The reception and feedback was brilliant - thank you to every one who came to our stand. There are some pictures and early Twitter feedback on the Loopwheels Facebook page, and some of the reactions from the press are here: 

The latest full review is from Bike Radar 13 May 2013:  http://m.bikeradar.com/gear/category/components/wheel-sets/product/review-loopwheels-20in-spokeless-suspension-wheel-13-47253

GizMag / Ben Coxworth 17 April 2013: http://www.gizmag.com/loopwheels-suspension-bicycle-wheels/27129/

RoadCC / Dave Atkinson 18 April 2013:
http://road.cc/content/news/81342-loopwheels-launches-funding-drive-kickstarter

The Headset Press / Dan Hunt 19 April 2013
http://www.headsetpress.co.uk/loopwheels-re-invent-the-wheel/

Blogging cyclist Martin Cox did a review after he rode Loopwheels; here's what he thought: http://themartincox.co.uk/2013/05/loopwheels-ride-world-exclusive/

And here's a piece by Peter Eland of Velovision: http://www.velovision.com/showStory.php?storynum=1264

Note on updates

I'm adding updates as the campaign goes along, often as a result of feedback in messages sent to me from Kickstarter supporters.  See updates 8 & 9 in particular for pledge updates, added 25 April 2013, and for conversion of pledge amounts into US dollars.  There are now choices of colours for your loops, as well as the original gorgeous blue.  A different colour is an extra £100 and the choices are shown in "Updates".

 I'm also adding in FAQs in the section at the end.  So check back for the most recent information!

What is a loopwheel?

Loopwheels are a brand-new 'pat pending' 20" bicycle wheel with integral suspension.  A spring system between the hub and the rim of the wheel provides suspension, cushioning the rider from bumps and potholes in the road.  

Loopwheels have a conventional hub with a hub brake and hub gears.  But the spokes are replaced by a spring system.  This gives an amazingly smooth, comfortable ride compared with a conventional spoked wheel.

Why do we need your help?

We now have high performing pre-production loopwheels for both a front and a rear 20" bicycle wheel.  Until now, our wheels have been made in very small numbers, and fitted onto bikes which we have bought individually.  I need funding to move forward into proper production, to pay the upfront tooling costs for the bespoke components that attach the springs to the rims and hubs, so that we can manufacture our loopwheels at an affordable price to share with the world.  Then we can make our loopwheels in batches not as individual wheels. 

So what exactly will I spend the funding on if we reach our target?

As well as the cost of pledge items (including bikes), I will use the money to fund:

  • the extrusion tool for the aluminium components of the loopwheel; 
  • the upfront costs of bulk orders of components;
  • a resin system for the springs.   (At the moment we make the springs using a simple steel tool which has been good enough for making springs for the small numbers of wheels we've done to date. But we need to invest in a much more sophisticated resin system for making springs in larger quantities and more quickly); 
  • materials to make assembly jigs, and other simple production equipment such as benches to fit out the industrial unit we've used for testing & development work.

And if we exceed our target: I might be able to afford some extra labour to help me out assembling loopwheels and posting them to backers!

What exactly is a loopwheel?

This picture shows the loopwheel and its various components.  The ones marked "JP" are the bespoke elements designed by Jelly Products (JP) (that's me!!)   Other components are standard bicycle parts that I've bought in "off the shelf".

The components of a loopwheel
The components of a loopwheel

The springs are made of carbon composite material, carefully developed and tested to give optimum compression and lateral stability as well as strength and durability.  I've designed connectors to attach the springs to the hub and rim, and these are aluminium extrusions. There are three springs in each wheel, which work together as a self-correcting system. The spring configuration allows for the torque to be transferred smoothly between the hub and the rim. 

Front and rear loopwheels have different spring rates. The rear is roughly twice as stiff as the front wheel.  A front and rear loopwheel can be used together as a set, or you can use a single loopwheel alongside a conventional spoked wheel. Loopwheels provide suspension on a bike which has none, or can be fitted in addition to suspension forks to give a smoother, more comfortable ride.

Because of the suspension within the wheel, you can use high-pressure or puncture-resist tyres. So you don’t need to rely on fat (and sluggish) tyres to cushion your ride.

What are the benefits of loopwheels over conventional spoked wheels?

Most folding bikes do not have suspension because conventional suspension forks add weight and bulk to the bicycle. That is particularly unwelcome in a bicycle which needs to fold down to a compact size. Replacing the spoked wheels with Loopwheels provides full suspension in a bike which hasn't got room for a traditional suspension system, but each loopwheel weighs only about 300g more than its spoked equivalent.  So you get a much more comfortable ride with no impact on folding, and only a small weight gain.

Unlike suspension forks, loopwheels provide tangential suspension: that is, they work in every direction. So they respond to a force hit head-on in the same way as they do to a force from above or below.  

Tangential suspension: the wheel reacts to a force from any direction
Tangential suspension: the wheel reacts to a force from any direction

What’s the benefit to the rider?

Comfort: Tangential suspension gives you a really comfortable ride, and people find they can take bumps, kerbs and cobbles more easily on loopwheels.

Reduced vibration: I find when I ride a loopwheel that I don’t experience the usual feeling of vibration up my arms, because loopwheels absorb and isolate you from the “noise” of the road. So I get less wrist and shoulder ache on long rides.   I didn't expect this when I set out on developing this product - but every one has commented on this when they ride loopwheels for any distance.

Smooth ride: The pedalling cadence is slightly different when you ride loopwheels, because the springs release energy more evenly.  This makes for a very smooth easy ride.

FUN!!!  AND - every one who has ridden a loopwheels bike so far has said “Wow!" - and smiled.  A lot.

How much travel is there in a loopwheel?

45mm.  The springs have a lot of give in them, as you can see on the video (the close up of the wheel at a junction).   You can see the amount of compression on the photo below, which is of a prototype loopwheel on one of our test rigs.  It shows the lower spring changing shape significantly compared with the two, which are not under compression:

A test loopwheel under compression (note - this is a different tyre from the ones we use now)
A test loopwheel under compression (note - this is a different tyre from the ones we use now)

How did the idea of loopwheels start?

In 2007 my idea of a wheel with tangential suspension was born when I was sitting at Eindhoven airport waiting for a flight.  I saw a mother pushing her child in a buggy. The front wheels hit a slight kerb and the child jolted forward because of the impact.  It happened several times in the time I was waiting there.  At that point this idea was just an idle doodle in my sketch book, and I left it that way for quite a while.

Sam's first notebook sketch of a wheel with suspension, 2007
Sam's first notebook sketch of a wheel with suspension, 2007

In 2009 I was doing a lot of off-road cycling and kept thinking it would be awesome to have tangential suspension in a bicycle wheel. I made some early prototypes.  They worked OK and proved the concept, but those early prototypes didn't really perform better than a spoked wheel. I knew that to be worth doing, this wheel has to be better than what's already available.

I did a patent search - and found that lots of people had tried this idea before, especially in the early 20th century. But the materials that were available then just weren't good enough for the idea to be made to actually work successfully, and I didn't let this put me off.

Old wheel patents . . . not all patented inventions actually work!
Old wheel patents . . . not all patented inventions actually work!

We have applied for patent protection.  I have registered design rights granted, and Trade Marks on the loopwheels name and logo.

Can loopwheels be fitted to any bike?

No.  Currently we are just making 20" diameter loopwheels, which is a small standard wheel size.  Many 20" wheel folding commuter bikes don't have any suspension so loopwheels are ideal for them.

We are fitting our loopwheels to a Dahon Mu folding bike.  The bikes we've used as demonstration models came to us from the UK Dahon distributor Raleigh, who are part of the the great bicycle heritage of our local city of Nottingham. 

Loopwheels on a Dahon Mu
Loopwheels on a Dahon Mu

Because of the way loopwheels work, they can't be fitted to every bicycle.  As the wheels react to changes in the terrain, the hub and the rim become non-concentric.  This means the loopwheel needs clearance between the top of the tyre and the front forks. This isn't a problem on some bikes - they have this much space for those fat cushioning tyres (which, with loopwheels, you don't need any more). But you need to check this on your own bike if you're going to make a pledge just for wheels.  

You need there to be a minimum of 260mm from the front wheel axis (the centre of the hub) to the underside of the fork, and from the rear wheel axis to any part of the bike frame, in order to fit loopwheels to your bike.  

Checking for 260mm clearance from the centre of the hub: front wheel
Checking for 260mm clearance from the centre of the hub: front wheel
Checking for at least 260mm clearance - rear wheel
Checking for at least 260mm clearance - rear wheel

In addition, loopwheels have hubs sized as follows:

  • Front drop out centre: 100mm
  • Rear drop out centre: 117mm

The "drop out centre" on a bike is the distance between the forks where the hub fits.  People also refer to the overlock nut dimension: it's basically the same measurement.  Watch out to check your forks are wide enough for our hubs!

We supply the brake cable and its clip.  It is quite easy for you to fit the cable to your own bike brake lever.

The hubs we are providing on our Kickstarter loopwheels are made by Sturmey Archer.  The front drum brake hub set is their X-FD and the rear hub set is their X-RD3.  So our Kickstarter wheels are 3-speed only.  In future, we plan to do a wider range of hubs and gear speeds.  But keeping it simple at this stage ensures we can deliver on our commitments to you.

What's the production plan?

So, how will we manufacture loopwheels once we reach our funding goal?

We already have a lot of what we need for production:  our pre-production loopwheels have been tested for strength, longevity, durability, compression rates and lateral stability and we have designed them with ease of manufacture in mind.  We know who is going to supply each component, the cost of that component and the lead times for delivery.  We have a workshop which we have been using to develop and test the wheels, and which will now become our assembly unit.  (You can see it on the video).   We are now designing jigs to hold all the components in place as they are assembled, and we are working out the most efficient assembly method and planning each stage of the assembly process.

Rig for testing kerb impact in out test unit.  We have plenty of space for assembly benches!
Rig for testing kerb impact in out test unit. We have plenty of space for assembly benches!

Suppliers:

Some of the components of loopwheels are standard bicycle parts: that's the rims, hubs and tyres.  We buy these in from the manufacturers in Europe.  Currently we get hubs from Sturmey Archer in the Netherlands, rims from Schuermann in Germany, and we use Continental tyres with a reflective strip.  The hubs come with brake cables and clips.

I designed the components which attach the springs to the rims and the hubs.  These are bespoke to loopwheels and there are up-front tooling costs to have these made in quantity: they are aluminium extrusions.  

I designed the carbon composite springs in close collaboration with a company with long experience in composite materials.  This is KG Archery, who have been making high quality archery bows for over 30 years.  So the main component of loopwheels are made locally to us in Nottinghamshire (Robin Hood's Sherwood Forest tradition lives on here!)  

Next steps on production

Once we reach our funding target, we can place our orders for the tooling of the connector components, and order the hubs, rims, tyres and bicycles.  At the same time KG Archery will get to work on making the number of springs we shall need.  This is one of the most time-consuming parts of the manufacturing process and involves a high degree of specialist knowledge and experience.  

What about larger wheel sizes?

I have a 26" loopwheel in development . . . I ride a prototype 26" loopwheel on my MTB but it's not quite good enough yet.  So I need to do more R&D on it still . . . 

Pledge items

STOP PRESS! See updates 8 & 9 for further pledge information, amounts in US dollars, and add-ons!!!  (25 April 2013)

We are offering our first production loopwheels to Kickstarter supporters. We've priced them lower than our expected retail price (which we anticipate will be at least £600 for a set of 2 wheels). We are offering them on a Dahon Mu folding bike or you can pledge for the wheels without a bike.  You can pledge for single front or rear wheels, or a wheel set.  You'll see that rear wheels are more expensive than front wheels.  This is because of the higher costs of the components, including stiffer springs. 

We hope you like our other pledge items. Oli Pepper of Morvelo was inspired to design this loopwheels technical cycling jersey when he saw Sam's "tangential suspension" diagram (shown earlier). Wow!

Morvelo's Loopwheels technical cycling jersey - front
Morvelo's Loopwheels technical cycling jersey - front
Morvelo's Loopwheels technical cycling jersey - reverse view
Morvelo's Loopwheels technical cycling jersey - reverse view

Our good friend Neil Bennett was inspired by loopwheels to draw some cartoons on the "reinventing the wheel" theme. Neil is better known as the cartoonist "NB"; his work has appeared regularly in The Times, Private Eye, Independent on Saturday magazine, Punch and the New Statesman. We love his drawings and are offering them as T-shirts and as prints. Here's the design for the loopwheels T-shirt (Apologies - the quality of the scans here are not as good as the final product . . . and the colour of the loops will be turquoise not green)

NB's cartoon for our T-shirts: Tea Direct
NB's cartoon for our T-shirts: Tea Direct

And we'll be producing NB's Penny Farthing "Wheels Reinvented" cartoon as a high quality A4 print.

NB's cartoon of a loopwheels Penny Farthing - you can pledge for a print of this cartoon
NB's cartoon of a loopwheels Penny Farthing - you can pledge for a print of this cartoon

Or if you prefer, you can choose your pledge reward to be NB's Stone Age Loopwheel cartoon (as a high quality A4 print):

NB's cartoon of a Stone Age Loopwheel - a print of this is an alternative pledge reward
NB's cartoon of a Stone Age Loopwheel - a print of this is an alternative pledge reward

If you just want to help us on our way, you can (of course) pledge any amount of money over £1 to support us - you don't have to pledge as much as £20.  But then your reward is just a warm glow, and backer updates from the project.

Risks and challenges Learn about accountability on Kickstarter

This is an ambitious project and it has been a long road to reach the point we are at now: tested and high-performing loopwheels. There were over 30 prototype wheel attempts before we found the right combination of design and materials, and many more different "recipes" for the composite springs. We weren't sure if we would be able to fund all the development and testing we needed to do, but we have done. We are not at the end of the road yet by any means! But we believe we can meet the challenges well, and will continue to find successful solutions if obstacles arise.

Risk no 1: a delay in supply of components

Assuming we meet our funding target, our biggest risk is reliance on external suppliers. The risk here is that there are delays in production. A delay in the supply of one component will hold up the whole production of loopwheels. But we know all of our suppliers well and we have experience of working with them. They are all long-established in their fields. We have identified a back-up supplier for every component. So we've got mitigations in place.

Risk no 2: managing the demand for loopwheels.

We have deliberately limited the number of loopwheels we have offered as pledges so that we can be confident that we can make enough wheels to fulfil pledges in a timely fashion. We expect the main pinch point to be making the springs. So we've tailored our plan accordingly.

Risk no 3: managing the production efficiently

We have lots of experience of R&D but very little of managing a manufacturing facility! So this is new territory for us. Happily we are being helped by a good friend who has 15 years' production experience and is working with us part-time. He has helped us develop our production plan. We already have a workshop big enough for production of loopwheels. The wheels have been designed from the outset with ease of assembly in mind: Sam has 20 years' experience of designing products for commercial manufacture. We are designing a series of assembly jigs now (to hold the components in the right place as the wheels are built) and with our kickstarter funding we will have these made and equip our production unit with the benches to make the production process as smooth and efficient as possible.

Risk no 4: the unexpected

Finally, we are a small company, so an unexpected untoward incident like a serious illness could have quite a major impact on us . . .

. . . but if you're reinventing the wheel, you expect to face some challenges along the way!

If you say you are reinventing the wheel, people laugh. But I'm quite determined (some would say stubborn!) So I didn't give up. I'm also creative and never short of ideas. I kept evolving my design and the combination of materials until I got a wheel that really performs. Brilliantly.

So please help me share loopwheels by supporting this campaign. Every pledge really matters to me. I am really grateful to every one who has helped me get this far, through encouragement and support in lots of different ways. In particular I'd like to thank David Duffield, who has never doubted either 20" wheels with suspension, or English engineers and inventors. He encouraged me to get on with it from the first day he rode them. And thank you to Kickstarter backers - I can only do it with your pledges . . .

FAQ

  • Loopwheels will never be suitable for racing road bikes, as the aerodynamics are not as good as a spoked wheel. It's the comfort that is the big advantage, so that's why I've gone for urban commuter bikes first. And I want to do a 26" wheel for mtb. I ride a prototype rear loopwheel on my hardtail mtb and it's beautiful.

    Last updated:
  • We will warranty our wheels for the same weight as the Dahon frame is warrantied: that is, up to 105 kg (230lb).

    In fact the wheels will take more weight than that. But you are right that one size does not fit all: the wheels we are offering on Kickstarter are designed for a median range adult. So they are too stiff for a very light adult or a child (won't get much benefit) and if you are significantly heavier than 105 kg you would need us to make you stiffer springs in your loopwheels. We plan to do that in the future, and to supply a range of loopwheels suitable for lightweight and heavier people, but sadly through Kickstarter we are only making the one median weight available.

    I'm really sorry that might stop you pledging via Kickstarter. But if so, please don't give up on us - we will do stiffer loopwheels for hefty guys in the future. Stay in touch!

    Last updated:
  • The news on Bromptons isn't good I'm afraid. We can make 16" loopwheels (I did some prototypes previously) but the issue is that there needs to be enough clearance between the wheels and any part of the frame, because of the movement of the loopwheel from the hub axis when the springs flex. There is very little clearance on a Brompton - not quite enough for a loopwheel. So unless Brompton can change their frame/fork length, we can't fit loopwheels to them . . . it's a real pity, as I'd love to see my loopwheels on a Brompton.

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  • The requirement or limitation is that you need to have at least 260mm between the hub axis (ie the centre of the wheel when it's not under compression) and any part of the frame - or fenders/mudguards/pannier racks. In other words, if there is anything closer than 260mm the loopwheel might touch it when the springs flex.

    If there is less than 260mm, you'd need to fit your mudguard or pannier rack a bit higher up.

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  • No. Though I did this on our demonstration bikes without a problem so far, there are technical risks as it can cause weakness in aluminium forks and cracking. I'm looking into a solution for the production bikes (either narrower hubs or getting wider front forks made: as stated in the text, the front loopwheel has a dropout centre of 100mm). But no, it's not OK to spread the front forks on a Dahon or other alu frame bike. I'll be communicating directly with all backers who've chosen a front loopwheel, about this, and I will make sure they have a solution that suits them/their bike.

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  • I have a 26" loopwheel in development. I ride on the prototype, and it's good, but it needs some more of my time in development to get it to the standard that I'd want it to be to launch as a retail product. Keep in touch, via our mailing list on www.loopwheels.com!

    Smaller loopwheels are less of an R&D challenge than larger ones. I've done 16" prototype loopwheels which perform very well indeed (but see the FAQ above about Bromptons). No reason why I can't do 14" and 12" loopwheels too if there is enough demand. As you get down to very small sized wheels however, there gets to be an issue with the amount of space available within the frame for the springs to flex, so you start to lose the benefit of a good amount of suspension travel.

    Last updated:
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  • Pledge £20 or more
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    36 backers

    Our own Loopwheels T-shirt, in grey cotton. The design is an original "NB" cartoon created for Loopwheels: "Smooth Delivery: Tea Direct". You won't get one of these anywhere else! Available for men, women and children. UK p&p included.

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    16 backers

    A high quality A4 print of one of NB's original cartoons, inspired by loopwheels and drawn especially for us: you can choose either "Loopwheels Penny Farthing" OR "Stone Age Loopwheel"; plus a loopwheels T-shirt. UK p&p included

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    22 backers

    A Morvelo technical cycling jersey inspired by and especially designed for loopwheels; plus the NB cartoon print; plus our loopwheels T-shirt. UK p&p included.

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  • Pledge £195 or more
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    8 backers All gone!

    ULTRA-LOW EARLY BIRD SPECIAL: A front loopwheel, with tyre, and hub brake, at a very special price for the first 8 backers only; plus the loopwheels T-shirt; plus your name added to the list on our website of special people who helped us reinvent the wheel. UK p&p included.

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    1 backer Limited (7 left of 8)

    ULTRA-LOW EARLY BIRD SPECIAL: A rear loopwheel, with tyre, 3-speed gear and hub brake, at a very special price for the first 8 backers only; plus the loopwheels T-shirt; plus your name added to the list on our website of special people who helped us reinvent the wheel. UK p&p included.

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  • Pledge £240 or more
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    1 backer Limited (19 left of 20)

    A front loopwheel, with tyre and hub brake, at a special low Kickstarter price; plus the loopwheels T-shirt; plus your name added to the list on our website of special people who helped us reinvent the wheel. UK p&p included

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  • Pledge £420 or more
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    8 backers All gone!

    ULTRA-LOW EARLY BIRD SPECIAL: Loopwheels front & rear wheelset kit, at a very special limited Kickstarter price for the first 8 backers You get: two 20” loopwheels + 3-speed gear + hub brake, for you to fit to your own frame; plus the loopwheels T-shirt; plus your name added to the list on our website of special people who helped us reinvent the wheel. UK p&p included

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  • Pledge £490 or more
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    6 backers Limited (19 left of 25)

    Loopwheels front & rear wheelset kit, at a special Kickstarter price. You get: two 20” loopwheels + 3-speed gear + hub brake, for you to fit to your own frame; plus the loopwheels T-shirt; plus your name added to the list on our website of special people who helped us reinvent the wheel. UK p&p included

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  • Pledge £950 or more
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    8 backers All gone!

    EARLY BIRD SPECIAL: a 3-speed set of Loopwheels on a Dahon folding bicycle: special limited Kickstarter price for the first 8 people to pledge for this item. Plus the loopwheels T-shirt; plus your name added to the list on our website of special people who helped us reinvent the wheel. PLUS UK p&p included! Wow!

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  • Pledge £1,000 or more
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    5 backers Limited (5 left of 10)

    LOOPWHEELS BIKE, PURE AND SIMPLE - issue 2: a 3-speed set of Loopwheels on a Dahon folding bicycle: no frills, except your name added to the list on our website of special people who helped us reinvent the wheel. PLUS UK p&p included! The first 10 have all gone so I'm adding 10 more, this time for delivery in October. If you'd like loops that are a different colour from the original blue, add an extra £100 to make it £1100 - plus shipping outside the UK if applicable. See update for possible colours!

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  • Pledge £1,000 or more
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    10 backers All gone!

    LOOPWHEELS BIKE, PURE AND SIMPLE: a 3-speed set of Loopwheels on a Dahon folding bicycle: no frills, except your name added to the list on our website of special people who helped us reinvent the wheel. PLUS UK p&p included!

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  • Pledge £1,200 or more
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    7 backers Limited (43 left of 50)

    THE FULL BUNDLE! Special Kickstarter edition offer: 3-speed loopwheels on a Dahon folding bicycle, and badged to mark it as one of the first, Kickstarter batch of loopwheels bikes ever made; plus a technical cycling jersey especially designed for Loopwheels from Morvelo; plus an A4 print of one of the NB cartoons; plus a loopwheels T-shirt; plus a personal thank you from inventor Sam; and we’ll include your name in a list on the Loopwheels website of special people who helped us reinvent the wheel. PLUS UK p&p for all this, included!

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  • Pledge £2,500 or more
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    0 backers Limited (3 left of 3)

    How the Wheel was Reinvented: the personal tour!! A limited edition (1 of 3) original sketch of the loopwheel concept, signed by its inventor Sam Pearce; a 3-speed folding Dahon with 20” loopwheels in a loop colour of your choice, with a personalised badge of your choosing; and a visit to Sam’s workshop to meet him and hear about the loopwheels journey to date; plus a loopwheels T-shirt; plus a Morvelo technical cycling jersey; plus an NB print signed by the artist Neil Bennett; plus a thank you card from Sam; AND we’ll include your name in a list on the Loopwheels website of special people who helped us reinvent the wheel - in special poll position!

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Funding period

- (29 days)