Trailers need more work, because they rely on adding a hinge mechanism under the closing nut of the rear hub, and the helix does not have one. Peter assured me he's working on an optional universal ball hinge attachment which will solve the problem.
But there should be no problem with the Travoy, because it mounts to the seat post, or so it seems

Quite true, but given that there are few if any other options for fatter tires for the 16" wheeled Brompton, then I have to move up in wheel size to get any sort of more capable ride. AND if I still want a compact fold, then the Helix potentially offers this combination.

I have also looked at other options such as the Terns, Dahons, etc. but their 20" wheeled models don't fold as much as I would want for travel, and their 24" or larger models don't really fold for travel but more for just convenience. So I'll see what the Helix has to offer.

I've pulled my kids' two seater WIKE trailer on my Brompton. It works! But it's awkward... not my first choice... if I'm bringing that large of a trailer, it's not exactly travel friendly, so I might as well just as use a larger bike. Your mileage with the Travoy or other similar system might be better.

Fair enough, but I never really bought into the lightest this, fastest that, etc. Meh... I shoot photography too. If I believed every claim by every manufacturer about how bloody good their camera is, I'd own them all! LOL For me, it was about the tradeoff: can the Helix really shove a 24" folding bike into almost the same footprint as a Brompton? My Brompton, with rack, leather seat, etc. already clocks in at just under 30 pounds. So for me, it's all relative. As with many others, I'm looking forward to the first "real world" experiences of the bike in actual use.

You can't pull kids on a Travoy but I can attest to the fact that it tracks amazing well even with heavy 60lb loads; in fact, I keep looking back because I think it isn't there anymore, lol. I've used it on a 16" and 20" Bike Friday andi it is brilliant. Not being able to attach a standard kid axle trailer to the Helix is kind of a big deal, I think, for families that travel so I hope there's a work around.

Huh... so I scanned the video... didn't manage to watch it entirely but I did catch the one part where he weighs it and it reads 11.38 kg, or 25.04 pounds. Did anybody else catch it? I think that's in keeping roughly with what the 10 speed configuration was supposed to weigh.

Hmmm... time to buy a new toy for the bikes! Heh heh heh.. not that I didn't look at the Travoy before... ahem... :)

It weighs 11.38kg / 25lbs for 10 speed version, which is almost TWO kilograms heavier than initially advertised weight. And that's without mudguards and racks.
Brompton M6L (with mudguards) weigh 11.7kg. So this bike is just as heavy as Brompton. Which means it is too heavy to carry around and should be rolled. And it can roll only on the front wheel.

Their website lists the single speed at approximately 23 lbs, the 10 speed at 24.4 lbs, and the 11 speed Alfine at 27 lbs.

My Brompton weighs more than even the top configuration. Yes, it should be rolled... what of it? Even if it weighed 20 lbs I wouldn't want to carry it around all the time. And as long as it rolls on the front wheel, great.

Nobody's talking about "carrying it around all the time", it's about ease of lifting into and out of transport and carrying up stairs. The difference between 20 and 25 pounds is significant in those cases; each pound over 20 is noticeable and - for me - could make the difference in whether I buy a particular folding bike or not. Right now a 10-speed Helix - which should benefit from an all ti frame and not having a heavy IGH - weighs more than a 6-speed steel/ti Brompton, not itself a notably light bicycle.

I'm sorry, if you're going to go after Brompton with a titanium frame, you gotta beat 'em on weight.

As someone who is constantly carrying her bike (up and down stairs to public transit) I agree weight matters. But - carrying a bike with 16" wheels is easier than carrying a bike with 24" even if the weight is exactly the same. Size is a factor in terms of how easy it is to carry. While the Helix fold is brilliant for a 24" wheel bike, there's no way it is going to be as easy to carry as the Brompton or other 16" bike for most people. Now just today I was out with my Dahon Mu Uno (which weighs 21.5 lbs after a few changes) and I definitely find the slightly bigger wheels more bulky to carry than my 16" Pakit - although the Dahon definitely rolls easily. But going up and down stairs and even up and down escalators with the bike folded (you get a ticket if you take an unfolded bike on one instead of using stairs) it would have been easier with my not-quite-19lb Pakit, both size and weight being better. But Baby doesn't go out on really crappy rainy muddy days ;-).

The naked 10speed Helix is at 11,38 kg. A Brompton S6E (steel, six-speed IGH-derailleur-combo, no blades, no rack) is listed at 11,27 kg in the Bromoton configurator (and at 1020 GBP). So surprisingly a comparable Brompton does not need to be the ti-version to still be slightly lighter than the Helix with it's ti-frame. This is no doubt a little bit disappointing and comes a litte as a surprise but for me it would not be a killer as I personally consider everything below 12 kg light enough in my daily practice. The lighter the better of course.

What is interesting to use another 24" folder as a comparison. The entry level Airnimal Joey Sport seems pretty comparable: 9-speed casette, disc brake in the front, 520 wheels, no blades, no rack. The frame is made of aluminium, it has a list price of 1290 GBP and a listed weight of 11kg (probably w/o pedals). Same ballpark as the Helix, no ti at all. It rides very well but folds worse than the Helix as you have to take out the front wheel for folding. I am not sure if the folded size is that much bigger for the naked version. The better comparison would be the (higher ranked) Joey Raptor as it has 507 wheels, 10-speed derailleur and dual disc brakes, so very comparable to the Helix. Unfortunately with this model there's no weight listed. I'd assume it could be a tad lighter due to the carbon fork and the higher speced components in comparison to the Joey Sport.

The Joey is a very robust bike, using standard components all the way and it is light too - I used to own a naked Elite Drop version and it was a pleasure to carry. So I'd assume for one that Helix pays a price for the additional and more complex hinges in comparison to the Joey and second that there might be additional potential for weight saving in future iterations - cannot judge. But it also means the weight of the Helix would at least to me not be an issue in daily practice - though again lighter would be nicer.

Don't go there! Nikon rules! No Fuji! Canon! Meh... who cares about Canon. LOL

Talk to the hand! Just sayin'....

Sure... lighter is always better - nobody is going to say they enjoy schlepping heavy weights around - but...

1. There's a lot of moaning and complaining how this titanium frame should be lighter and that the implication is that Helix has somehow screwed up in not making it lighter still. Why? The website lists the weights for each of the configuration, and the lightest configuration - 23 lbs - was to my recollection always the stated weight. There seems to be the implication that the marketing was false or misleading but the stated weight of the 10 speed configuration on the public website is 24.4 lbs. An actual user weighed it to be 25 lbs. This is a difference of a mere zero point six pounds, and this assumes there was no error in measurement. So, the bike weighs what it was stated to weigh. How exactly is this disappointing or misleading at this stage? You still find that too heavy? Fine - make sure you read the fine print and don't buy it. It clearly doesn't fit your specific needs. [EDIT: As is pointed out later, the KS campaign listed lighter weights. So be it. That the risk you take with KickStarter. It was prototype that was featured after all. The website clearly reflects more up to date information.]
2. The weight is apparently comparable to a Ti-Brompton or some other folder, and maybe even a fraction heavier, so the Helix has missed the mark. Has it? Who said it was meant to be a direct replacement? What are the tradeoffs? Oh wait... it has 24" wheels, not 16" wheels. And it doesn't fold mid-frame, so that should offer structural advantages. Well, others don't fold mid-frame either. But the Helix offers (to be verified by actual owners) the most compact fold given its wheel size; others don't. And it folds without compromises - no taking the wheel off, no strapping things together. So what do we have in totality? A TWENTY FOUR inch wheeled bike - not a 16", not a 20" - that offers likely greater structural advantages AND can (so it is claimed) fold down to a form factor - and fold easily (again claimed) - that has yet to be achieved by any other folder of comparable wheel size.
3. A titanium bike should be lighter - why? Maybe the fact that it is constructed out of titanium is what has allowed Helix to design in features (folding, safety, etc.) while still keeping the weight reasonable. What about the inverse alternative? Back when everybody was complaining about Helix being all smoke and mirrors, several comments stated Helix should just forget about the titanium alternative and just build the same design out of steel to get the damn bike to market. Let's say that happened. The bike would come in at several pounds heavier... and then I bet people would start complaining that Helix should offer a titanium version to save a few pounds. I'm going to paraphrase retrogrouch Grant Petersen: the obsession with weight savings is misplaced... a few pounds of weight reduction on a frame can reduce its integrity significantly; most people would be better off losing a few pounds off the engine (i.e., you, the rider).
4. But every pound counts. Sure... but in practice, probably not as much as you think. I've hauled my Brompton on trains, packed into planes, and up and down stairs. Would it be nicer if it was a couple pounds lighter? Sure. BUT when compared to my backpack loaded with my laptop, files, lunch, water bottle, reference documents, etc., or my overnight bag with clothes, toiletries, blah blah blah... a savings of 2 to 3 lb would be less than 1% of the total weight (including me) that I'm moving. Not surprisingly, the reality is not quite as effortless as Brompton portrays on it shiny advertisements.

So, now that the bike is out in the wild... let the users document their experiences about how the bike works in totality. The perceived significance of a few pounds is not going to make or break the experience for those who felt the Helix fits their needs.

I think what other posters are comparing to is the original claimed weight from the Kickstarter page, which was 20lbs for the single speed, 21lbs for the 10spd, and 24lbs (23.7 actually) for the Alfine 11. Seems like the lineup as a whole gained around 3 pounds.

Thanks for the reminder... fair enough, but hey, it's Kickstarter. Not only might you not get your product, but specs are subject to change. And the KS page only listed them as "approximate" weights. Caveat emptor. Personally, if the changes mean improved handling, durability, and safety, then the extra three pounds are probably worth it.

Aside from the backers, some of whom may not care about the weight and some who might, the market will take care of the rest. Actual weights will be available for any prospective buyers who can decide how much "weight" to give that factor. My suspicion is that most of the whining is about the loss of the "ideal" which is what the KS Helix represented in many ways.

My "complaint" - such as it is - is that the bike was presented as a lightweight new folder, with the titanium frame being the representation of that promise. People can keep saying 3 pounds doesn't matter to them personally and I believe them, my point is it's a big miss marketing-wise. If you said your carbon race bike was going to be 16 pounds then it landed at 19, that bike would rapidly cease to exist.

Lots of people deliver what they promise on Kickstarter, some even on time.

Just for a moment lets forget what the bike was "suppose to be" and look at the bike as something brand new, like you have never seen it before, never heard about it. When you take away your perceived notions it appears to be a pretty cool bike. There isn't a bike that will appeal to everyone but for some the Helix is going to be perfect. Imagine walking into a retail establishment and seeing that bike for the first time? I am not in the market for another folder and even if I was, Helix wouldn't be on my list but when I watched the video I couldn't be more impressed with what they built. I can't wait until I see one in person.

I was one of the naysayers on Helix, thinking they would never produce a bike but I am glad to say I was 100% wrong. So, congratulations to Helix and to the backers that persevered and will get/got their bikes.

If I were a svelte athlete, & racing my Helix in a Tour de Something, 3# would be a deal breaker.
But I'm not, & I won't, so it isn't.
No other 24 incher will fit where I'll carry it.
24" is better than 16" or 20".
TI is pretty.
And the bike is beautifully gearhead with all the fiddly mechanisms.
Lighter would be nicer, but here is what I'll tell mine when it arrives....

I traveled the Elbe bike track and others with Brompton followed by Radical Design Chubby trailer on a variety of surfaces, and it was very comfortable.
The great thing about the Chubby trailer is that it can accommodate the folded Brompton plus some equiment (minus its self weight of 6kg), so may it also be used as a suitcase for air travel. The Chubby 3 had some stability problems. Radical design say that model 4 solves them, using the same frame as their excellent Cyclone trailer. I am seriously considering using a Chubby 4 trailer with our Helices for our summer trip, if they arrive on time .
Peter assured me that the folded Helix can sit in the Chubby 4 "with room to spare".