A first picture of the Dahon Lunden 20"


Its very different from the Lunden 16" which is a classic 16" Brompton clone

20-Inch LUNDEN: The frame is completely redesigned for extreme rigidity, featuring a direct linkage between the headtube and the bottom bracket, strengthened seatstay for extra stability and speed. Equipped with 2.0 wide tires, it is well-suited to urban riding, uneven pavement, and light gravel conditions. Its size is 12% smaller than conventional 20-inch folding bikes, improving portability without compromising ride feel.

LUNDEN series features an innovative Dynamic Suspension System that allows for quick, on-the-fly damping adjustments based on road conditions, balancing pedaling efficiency with impact absorption. The multi-segment adjustable seatpost allows precise micro-adjustments in height and angle, ensuring optimal ergonomic fit and consistent comfort across a broad range of rider profiles.

Featuring DAHON-V Tech with Proven Performance

The LUNDEN 20" made its debut at the CABDA Midwest, USA event on February 4-5, garnering widespread acclaim from dealers for its exceptional performance tailored for adventurous riders. This model features DAHON-V Tech, including the patented DELTECH and an adjustable handlebar, making the Lunden tri-fold series equipped with the most essential elements for top-tier performance.



Previously featured in international media for its innovation and performance, DAHON-V Tech has established itself as a benchmark in folding bike technology. Building on this foundation, global folding bike leader DAHON today unveils its all-new LUNDEN series of tri-fold bikes, powered by the proprietary DAHON-V Tech.

Industry Perspective: Performance-Led Differentiation Gains Momentum

"DAHON's recent technical advances are prompting renewed attention to frame stiffness, drivetrain efficiency, and real-world ride performance," market analysts noted. As rider expectations continue to evolve, the tri-fold bike segment is gradually shifting away from price-driven competition toward performance and engineering-led differentiation. With DAHON-V Tech at the core of the LUNDEN series, DAHON positions itself at the forefront of this transition, making the segment's next phase one to watch.

For more information, please contact: cs@dahon.com

Learn more about LUNDEN: https://usa.dahon.com/blogs/news/dahon-cabda-recap

View original content to download multimedia:https://www.prnewswire.com/news-rele...302683501.html

SOURCE DAHON TECH

Yes, Dahon reinvented the tri-fold folding bike, its especially obvious with the 16" Lunden

Call me a skeptic, looking at the 20, but I don't see it. What advantage over Brompton? They weigh the same, and both have a heavy IGH. OK, you have something called V-tech, some redesigned aluminum tubes and a cable. Brompton has a steel frame. And then there is the availability of parts

The 16" Lunden looks so close to a Brompton, I'm surprised Dahon expects it can sell it in the West without being sued for copyright infringement

As far as I know, Brompton eventually lost all action they did for copyrights infringement?

Now, remembering how Dahon commercialized the Curl, the question is how Dahon will commercialize these 2 new tri-fold which if what they wrote is true will be relativity expensive?

For the 16" Lunden, the question is what is the benefit of it vs. the many clones that will probably be cheaper?

For the 20" Lunden, its not really a clone, but there are two problems:
- It has a aluminum frame but is as heavy as the G-line and heavier than most of the 20" clones
- And it will most probably be much more expensive than the 20" clones.

Based on the marketing claims of Dahon, none of the two Lunden seems to have any advantage vs. the original Brompton (besides maybe a lower price) and the clones?

In that case, why aren't Chinese clones sold in the West?

For the price of a C line, we'd get one with disk brakes and either a standard derailleur or an Alfine gear hub.

3sixty, Mint, MIT, Cranston, Fnhon, etc.

The clones are available online and can be shipped to Europe.

I think that they aren't sold in bike shops because there is no distributor nor anybody else that will provide the legal 2 years warranty nor provide any after sale support.

Its the same as for many Chinese ebikes that are also only available online with a main difference that the market for folding bikes is much smaller that for ebikes.

I also think that for tri-fold, Brompton is very strong in Europe and people prefer to buy the real one than a clone that with the legal warranty and an after sale support will be not be much cheaper.

now, its interesting to see that two specialists of bi-fold folding bikes, Dahon and Fnhon, presented tri-folds folding bikes with for Dahon the selling proposition that tri-fold folds smaller than bi-fold that Dahon more or less invented and advocated during decades.

One question: Why does it need the "Super Downtube" AND the Deltech cable? Seems like it could have a lighter main tube & downtube as a result of having the Deltech cable?

...or if it's going to have a super-beefy frame, it could do without the Deltech cable?

I have mentioned earlier that I'd be interested in a trifold that's NOT a Brompton, but Dahon isn't it. Their customer service and support is absolute trash. I do like the Mariner XL, provided I can service it myself. Otherwise, I'll stick with my Origami Bull. It's built like a tank, and I can upgrade parts as I see fit.




C/O the NBDA

• Mariner XL: An enlarged version of our award-winning Mariner series, Mariner XL is engineered for bigger riders, supporting a maximum load of 330lbs. With 22-inch multi-terrain tires, an extended one-piece forged stem for added ergonomic comfort, patented DELTECH and Super Downtube, this bike guarantees a smooth ride and superb performance.

Brompton do not have a "Super Downtube" nor a Deltech cable and nevertheless their frames last forever!

This is pure marketing ****.

It doesn't seem to have added anything to it's weight bearing capacity, so I wholeheartedly concur...

The Mariner XL weight limit is 330.

It's a G line clone. Except it's aluminum. It isn't lighter, or even specced better. Why not just buy the Brompton ?

Brompton sued Dahon over the Curl in 2017. The suit was thrown out and Brompton had to pay court costs.

Brompton sued Chedech in 2019. It took a while (COVID delays) but Brompton lost that suit and had to pay court costs.

If W B-A wants to spend more money on lawyers to lose in court, he's welcome to.

Don't act surprised. Dahon was exhibiting this bike @ Eurobike last year, as I reported here at the time.

Not so fast, with the pitchforks and torches!

Well, price is one possible reason, Bleu.

The fact that Bromptons are aluminum instead of steel is a huge difference. Steel is a lot more ductile than aluminum. It can flex a bit all the time without wearing out, whereas aluminum can only flex so many times and then it breaks. Aluminum is usually made thicker and stiffer, to avoid the flex & breakage, whereas steel bikes are not made to be so stiff, as the flex is a good trait. Especially in the un-braced Brompton design. That flex in the steel tubing is a big part of why they ride so well despite having 16" tires at 100 psi.

As to the weight, I don't know if Brompton uses better components or thinner tubing to keep the weight down, but they do know what they're doing with this design.

My comment was about the Lunden being aluminum, and there otherwise being little apparent difference. Many people think aluminum is as strong as steel, aluminum is only as strong as steel if they weigh the same and aluminum is a third as dense. Steels fatigue strength is generally higher. Just amazes me that Dahon doesnt take the original design and actually improve it. Brakes, no more slipping plastic seatpost trash, needle bearings and a cartridge type rear pivot. What did I miss?

I agree 100%.

Dahon wasn't the original tri-fold design.
They were not even in the first two rounds of copycats.
Why not take that time to learn from others' mistakes, rather than make just another copy and slap a Deltech on it?
It was a missed opportunity.

Not sure where you've been, but they did.

Curl. Curl D9. Curl i4.

Those bikes have been savaged here on BikeForums/FoldingBikes.

So now we get 'DaBrom'.

Agree: Curl was a real new design while this 16" Lunden is just one more clone, its a regression wrt. the Curl and coming from the biggest folding bike manufacturer, its a shame.

For the 20" Lunden its less evident, let see the bike when it become available (if it become available elsewhere than in China).

BTW. why did Dahon give the same name for two bikes that, excepted the fact that they are tri-fold, are totally different?

Seen the two Lunden huge differences, I imagine that their price will also be very different, with the 16" Lunden in the price range of rim brake 16" Brompton clones, and the 20" Lunden (much?) more expensive.

Curl was no improvement over Brompton. Rim wrecker brakes, same weight, cost as much usually unavailable anyway.

Isn't the lunden at 15kg stock pretty heavy? Most of dahon stock is 12-13kg.

anyone friends with a Dahon dealer to ask if 16'' will come the the USA? There is an American flag sticker on 16'' version seat-tube frame.

Isn't it because Dahon is still supposed to be an US bike brand?

The Curl D9 looked awesome; DISC brakes (and a real innovation of them mounting the front caliper on the front of the right (mono, only) fork blade), eliminating the problem of axle pullout with discs that required thru-axles), without needing a unique front caliper, easy to service external gearing. The front mono-blade "fork" might have required a special front hub, or not with just a bolt in place of typical axle, that was my only concern. But the whole bike, looking great in pics, was VAPORWARE, i.e., non-existent in the USA.

They're supposed to be "Designed in the USA", that has always been advertised, but always built in Taiwan or China. "Design" could be anything from rough sketches to actual engineering with computer modeling and stress analysis. If I had to guess, I would put the detail engineering and lab testing at the manufacturing point, that makes communication much better on critical manufacturing characteristics, and changes to processes if needed.