The PUSH FORK is Finally Here - Nine.One Upside Down MTB Fork Development Story and Details
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- čas přidán 17. 05. 2024
- Thanks to @MaxxisTiresUSA, @FOXFACTORY and @jensonusabicycles for supporting The Inside Line MTB podcast!
Vital first rode a prototype PUSH Nine.One inverted mountain bike fork a year ago in February of 2023. The same day, we recorded an interview with PUSH owner, Darren Murphy, getting all the details about the fork before its release. At the time, the scheduled release for the Nine.One was only a couple months away and PUSH showed the fork at the Sea Otter Classic. A couple months turned into many months and fast-forward 12 months later, and the fork is now available to the public.
At $2,600 USD, the coil-sprung Nine.One is 100% made in the USA at the PUSH factory in Colorado. It features 140-170mm of user-adjustable travel, and uses modular axle lugs that can fit 27.5 or 29-inch wheels with built-in brake mounts for 180mm or 200mm rotors. The damping technology is that of the PUSH Elevensix shock and oil can be changed and serviced through bleed ports at the top of the fork.
While most riders can't comprehend spending that much money on a fork, Darren and PUSH set out to make a highly refined piece of suspension that can last and be adapted for years to come. We dive into why PUSH would make a fork, their philosophy on what makes good suspension, misconceptions of upside-down fork design, what took so long to finish production and why someone may want such an expensive MTB fork.
Discussion Topics
0:00 - Intro (2024)
1:00 - (Feb 2023 Start) Why Make a Fork at All?
4:23 - Why Make an Inverted Fork?
8:43 - PUSH Nine.One Fork Specs & Features
10:21 - The "Grab the Bars Torsional Stiffness Twist Test" is Dumb
15:54 - Modular, Updatable Axle Lugs for Wheel Size, Offset and Brake Mounts, Travel Adjust
20:23 - Simple Fork Servicing Through Bleed Ports, Long-term Product Use
25:47 - Why is it a $2,600 Mountain Bike Fork? Weight, Fabrication Details
31:44 - Comparing Other Inverted Fork Designs, Why Not Carbon?
34:22 - Spring, Damper and Internals
38:20 - The Parking Lot Test
41:45 - Jason's Ride Experience on the PUSH Fork
44:57 - Purposefully Not as Torsionally Stiff as a Regular Fork
47:14 - Availability
48:47 - What About Stanchion Scratches / Guards/ Fenders?
51:47 - WHY DID IT TAKE SO LONG? (2024)
1:00:44 - Did Anything About the Fork Change During the Year?
1:02:30 - Fork Specs (Again : )
1:05:14 - Four Years in the Making
1:06:58 - FIXED BUSHINGS and Why
1:09:51 - Would Darren Do It All Over Again?
1:11:53 - The Twist Test is Still Pointless
1:16:00 - What MTB Standard Would Darren Change?
PUSH Nine.One Fork Details
MSRP: $2,600 USD
Travel: 140mm-170mm in 10mm increments. User adjustable
Axle: 15mm x 110mm floating through axle
Axle Clamp: Oversized 38mm clamp area, 4 bolt design
Steerer: 1.5” Tapered
Brake Mount: Dual Standoff Direct 180/185mm and 200/203mm
Made in Colorado
MTB and E-MTB compatible
Main Spring: Coil with silent-surround noise canceling technology
28 Clicks of External Low-Speed Compression Adjustment
28 Clicks of External High-Speed Compression Adjustment
18 Clicks of External Low-Speed Rebound Adjustment
Independent externally adjustable Pneumatic Bottom Out Piston
Motorex 3D Response Technology Fork Oil
Weight: 2,790 grams
#MTB #mountainbike #suspension #podcast - Sport
The details of this fork are next level! Well done PUSH 👏
Well done.
Europeans already made high performance Enduro Mtb inverted fork, Intend (alu) in Germany and Brigth (mixed alu+carbon) in Italy
americans dont know europe exists
@@madeiradriftin4429 What is European anyways?
@@scubaseppy Means quality.
Wow, that was the most interesting product interview I have ever listened to. Well done PUSH. I think I am sold.
Great interview! Thanks for taking time to put this together.
Push is such a cool company. Great interview, boys. Thanks for the content 🙏 🤘
Amazing... Cant imagine the r&d costs. Ty Push for putting in the effort to actually contribute a real gem to the industry... Many will now copy and costs will drop.
You know they are not the first ones to do a MTB long travel inverted fork, or? So actually Push copied others.
@@dit4963I don't see the similarities, yes many have tried and they have not been successful for a reason. This is a different level.
@@dit4963did you even watch the video
Intend have been succesful on their USD fork also add up Manitou Dorado existing for years
@@dit4963I’m not sure what your point is, because by your logic, everyone is copying each other with every other component on a bicycle. There are different ways to tackle the same problems, this is their contribution to the suspension fork landscape. They do have some innovations with this fork, some which had me thinking why didn’t one of the two mega suspension makers think of that.
That was such an eye opening Interview, Darren's point about the parking lot tests being bullshit were really valid. The twisting effects happen underneath the wheel directly in line with the fork legs with very little leverage, and the bump sensitivity comes from below the front wheel, not from just pushing on your handlebars.
Keep videos like this coming!
49:18 Common misconception is that the "tube that goes inside of the other tube" is the stanchion.
The stanchion is always the upper tube regardless of weather the fork is conventional or inverted.
The only cogent comment here. Thank you. The other issue unmentioned is ‘muck’ for the regular user: I’m not making a point about seals, but about accumulation of muck whilst protecting the external surface of the piston.
For a top line MIA fork, the price is completely reasonable. While I certainly don’t ride top tier, it’s nice to see a company really go for it like this.
I agree. No point in crying abt price knowing I can’t afford one. It’s nice to admire the tech tho.
This interview is a great way for people to understand why it costs that much. Nobody is holding a gun to ur head telling u to buy it lmao
Username checks out 🤣🤣🤣🤣
Nope
@@FOTB407Just like the automotive industry, trickle down does happen. Mid level bikes are more capable than a top tier bike from 5 to 10 years ago.
Lol...No weight mentioned on here or their website??? 🤔
$2600 USD Really???
Still hasn't been proven yet..🤡🌏
Just because they slap a big price on it doesn't make it a great fork??? 💲💲💲🤔
I'll never have the means to buy this, but I'm glad it exists, even if it's mostly engineering porn. It's both a high performance component and a museum-worthy piece of art, hats off to Push🤘
enslaved as well, huh?
@andretokayuk8100 ride your suntour and leave people alone.
great interview - thanks! 🤜
wow....love the looks....I bet it rides amazing!
Bro did not want to say it weighs 6lbs 😂
I thought it was just me 😂 he didn’t answer the question AND the interviewers let it slide… 🤔
The bike industry is fanatical about charging a premium for lightweight components and frames…Push’s philosophy goes against the grain across the board. 🤔 I may have to save up for this fork…
I have my set already. I can say they are the most amazing looking piece of kit I've ever laid eyes on. Can't wait to test em out.
How's the season coming along on them? They look fantastic. Strengths and weaknesses coming to light?
@@StankFernatra Hey mate not sure why but I've replied to this a few times but it hasn't come up. The fork is amazing. If you are familiar with the Push ACS3 upgrade then you'll be familiar with there feel of this fork. This is just a super refined version of it. For me, totally worth the money.
Would love to try it. I like the all-out making the best they can make concept.
MTB Fork Is Love. That was outstanding pieces of I had ever seen.
Great interveiw! Great to learn about the Push. Would love to try it someday. I have a wren and have enjoyed it. The push wpuld be a beast im sure of it!
This is a dentist E bikers dream.
Spoken like a true loser. You think there is nobility in being poor...only to others who lack the ambition & intelligence to to become a "Dentist" as if that's an insult. Of course you can't understand that people who can afford the latest technology help everyone when it trickles down to lower cost products.
But WTF man, all my loser buddies & I laugh at those chumps who go to college & make the best of themselves while I play video games & drink beer in mom's basement. And no, I'm not a dentist.....I just am glad there are dentists...every time I need one.
I've been riding the Rockshox RS1 on my Cube for over 6 years - carbon upper. VERY happy with it. Super efficient, minimal maintenance compared to normal forks, and although only 100mm, has held up well at UK trail centres, XC (of course) and even a tour of Mont Blanc where most other riders were on Enduro bikes 😁
No stanchion damage in that time.
I got to buy this forks ❤
Damn it looks sick!
The stiffness thing has been an eye opener since experimenting with rim materials and models. Makes total sense for forks too
Apparently the Zipp 3zero moto rims are a poorly kept secret when it comes to how comfortable they are. They have built in flex which makes a bit of mechanical grip
@@kingflynxi9420.y thoughts also and other carbon wheel Brands have adopted some sort of compliance theory
Looks sick
1:16:07 agreed... Steering tube diameter... Great conversation guys! Learned a lot!
About 20 years ago I had a Klein adroit and I wanted to put a pair of Pace MXCD forks on it, had to get a customer steerer machined as pace only did 1"1/8th, boy was that new steerer stiffer and more direct. Fully taper bored on the inside, about 5mm thick at the bottom.
Biggest question is how long will they be able to keep that $2600 price tag before sunsetting this fork?
So what does Darren think the steerer should be? There was the steel steerer by either Marzocchi or was it Rockshox and we did have the Maverick dual crown trail fork. Should we just have a dual crown 150-180mm travel fork?
Not even 15min in and marketing BS started to pour. 11min, you know why you don't see MX dudes twisting fork with wheel between their legs? because mx axles and hubs are almost twice as big as mtbs, forks have 46+ stantions and most of all dual crown...just admit it, producing regular fork is much more expensive, casting lower legs requires moulds and machinery in orders of magnitude more expensive than some CNC rig.
Very cool! I have a 29" Fox 38, and IF I go to the bikepark, I use a 27.5" wheel... It's not dead, it's a purpose question! Thanks for doing this!!
Well I just fell in love... my GG Gnarvana wants this to pare up with the eleven 6 rear coil.
"So, how much does it weigh?"
"comparable to a 38mm fork, but it has full coil so that's the advantage we have"
You'd be a great politician lol...
Exactly my thought. This 36 mm fork is ½ kg heavier than 38 mm Öhlins/Fox/RockShox forks. So it was a lie.
He also never answered the question of why most motorcycles use inverted shocks after attempting to explain it twice
I wonder how the compare with Intend forks?
Price and weight are immediate disqualifies for me. It looks cool, and the modular axle thing is a cool idea.
This seems to check a lot of boxes I want in a fork. I'd be down to trying this. I'm interested in the long term ride review.
For 2600 bones you can 😮 if I had the money just sitting there I'd probably want this even more but I'm in no illusion that I need this I'm just not that good
@@astonsolly3793yeah 2600 for fork, 1600 for shock, plus tax, plus yearly maintenance to keep the warranty. Up front cost about 4600.
What a gem of a video, thank you !!! I have excellent experience dealing with PUSH, I had the 11.6 on a Nomad and it was 🥰 This fork looks like a piece of art, I personally can't afford it but the performance will dictate if it is worth the cash. I can't afford a Porsche 911 GT either but for those lucky enough to have the money they decide if the performance is worth it. The one thing i found interesting was the weight, while it is heavier than a Zeb or Fox 38 is not by a huge amount in my book:
Fox 38 = 2460 g or 5.42 pounds
Zeb = 2337 g. or 5.15 pounds
Push = 2790 g or 6.15 pounds
The push is a pound more than a Zeb and 0.73 (331 g) than a Fox 38; that IMHO for an enduro fork seems reasonable, again performance will dictate if that weight penalty is worth it along with the price tag. Can't wait for the full review of this fork and a comparison to the aforementioned fork.
Tons of interesting information and really great content. Not a fork for me. I would love to hear their take on Trust fork and why they did not chose linkage.
Yeah the torsional flex people whine about was great on prior inverted forks like the Maverick DUC. It improves traction. I never got the ride the inverted xfusion revel-x fork. I don't know if I'll ever ride this one either due to the price, but it seems awesome and inverted forks have been good for a long time. I must say changing the oil from the top is pretty awesome as well. I already have a push'ed fox 36. I do wonder if they thought about a dual crown inverted fork though. Honestly it seems a lot easier, maybe frame warranties might be voided if they did that. The DUC36 was carbon and it never was released. Not surprised that they gave up on carbon as well.
Conventional forks flex. The inverted fork has leverage plus the lube factor. Smooth as a babies ass. Finally in the right direction. The twist is normal in the inverted fork. From a moto perspective I think this gentleman did it proper...
Very cool ideas the coil sprung though you would need s test before buy option there for the price
Where I ride (western washington state) a large front fender is pretty much a necessity to avoid getting mud in your eyes. What are the fender solutions going to look like for this fork?
Can i add a small thing please, i have a set of inverted forks on my mtb fatbike (135mm width - can't remember the brand just now) but i built it light with Magura MT8s brakes & the wheel deflection when hard braking is horrendous. Definitely 100% steers the bike under hard braking. Did you get any data around this? Ended up i had go down in rotor size & not use full brakes
Very insightful video. I am not sure I would buy it. I am looking at the EXT fork and shock. I do wonder the lowers that might be closer to rocks, etc. and more exposed to get damage.
I had a White Brothers DH3 fork back in the day and to this day is the most amazing and sensitive fork i´ve ever had. Fox´s Grip2 and RS Ultimates are amazing forks but i still cant find that small bump sensivity
A brake mount where you don't need any extra bits to change between 180 or 200mm rotors. Great....but. Surely that mount still needs n extra piece to be able to fit a caliper in both positions?
That head to head shot with his 38mm forks shows really well how much less the bars move on the push fork, that has to translate to a smoother feel. It's way expensive, but if I can move it across 2 bikes over ten years it's making sense.
It looks solid and i'm sure it feels good and works good but for me is a question. When time will come to service it who will do it and especially if like me are from Europe ? And question two who will replace mine lower legs
when it gets scratched and it will happen really soon and how much it will cost me?
What size are the stancions?
How do you install a mudguard?
50:56 mud guard discussed. 44mm uppers, 36mm lowers. all specs/details - www.vitalmtb.com/features/upside-down-push-nine-one-fork-finally-here
Is there a money-back period?
44mm / bolts
had an old maverick back in the day. twisty and meandering up steep, undulating, off camber climbs. made it difficult to nail narrow lines. turned me off to upside down forks. I look forward to hearing how this does in similar situations.
if you set up a maverick properly it rules...
Yup, had a set and might as well ride on a set of chopsticks.
I'm sold. In fact, I just spoke with a divorce lawyer, because I am going to need one. I don't think the "but honey, I don't have to ever buy a $20 brake adapter again" is going to soften the blow on this one boys. Maybe she'll understand the benefits of never having to do another lower service, but I somehow doubt it.
Hell with it....the kids are grown.
😂😂
You let your wife utterly dictate and control your passionate pursuits? Weak, bud
@@moonmuscle3332 Holy shit man, is that what you got out of it? $15k worth of bikes in the garage would say different. But, try reading it slower. Regardless, some things are done for comedic effect. To illustrate a point (and no, I don't mean with crayons). Ah, well. They can't all be fans. Be well, homie
Hell with it…kids is grown 😘😘😘
@2.6k, makes Intend look right on the price!
Forks can have all the hype, but from what I've seen out there:
- those who have the cash, can't really smash
- who can smash, won't dash that kind of cash
Well this explains why we had a shortage of tubing in the oil and gas industry for the last year. Also explains why these forks are so expensive. Personally another $1200 over a Fox Factory 38 seems ridiculous to me. I have a pretty good idea what tubing company was used, insider trading 😉 What about service, does this require to ONLY be serviced at Push or will local shops be able to provide a service. Thanks
I owned a Maverick ML7 which had a DUC 32 fork. Way ahead of it’s time on many aspects. Inverted fork (dual crown though and it leaked a bit) AND it had the first dropper post. Good to see a refined version of the inverted (even though Intend and a few other brands are making them too).
Not the first dropper. Gravity droppers we’re around for a couple years before the speedball dropper hit. We don’t need to talk about the height rite from the late 80s. Those were great bikes with that fork and the strut shock it ran. Definitely ahead of its time.
Mountain biking has been driven by bro science for most of its history. That’s really has been the main reason (other than Sram and Fox marketing) why most riders have been against upside forks.
$2600 is just stooooopid.
What do you think they've invested in developing that piece? I agree that price is up there but I have no clue how much it took to get here.
@@peterk7662they make money back alot quicker if it was in a price range more accessable. Drop 1k off and bet twice the amount will sell. Alot of people wanting inverted forks to return.
I love all the tech and thought that goes into this development and that’s it’s built in the US.
With that being said I think the selling point on these bad boys will definitely be allowing customers to demo them prior.
I think Push has done this in the past. With their rear shocks?
At 2600 bucks I think most riders/racers would need to toss it on and go “that’s substantially better than anything I’ve ever ridden” almost instantly to want to invest that sort of $.
will there be any fender options for wet weather environment's?
he mentioned a fender is available
Darren. How is bright and intend not dedicated to making an inverted fork?
No mention of the truly important part of any fork or shock, the damper !
I think Manitou made an inverted DH fork in the mid 2000's.
It's still does. Also dvo made one, and x-fusion
Also, Honda made a DH bike in the early 2000s with a USD fork made by Showa.
Even RockShox made an inverted fork for XC around 2015. Not sure why they discontinued it, it got great reviews.
The Dorado, your best bet for a dh fork
They still do . The Manitou dorado is probably the best dh fork in the market, it just doesn’t get the attention. Modern mtb isn’t really about performance, it’s just marketing.
Wren has been making inverted forks for fatbikes and MTB for long time at an affordable price point.... Push can kick rocks...2600 madness
yeah, thats what i am thinking
I have a wren on my fat bike. I love it. It’s so beefy looking. They make them for traditional MTB hub spacing. Super easy to service yourself as well. With infinite progression adjustment. The damper could be worked on but for the price. Its way more practical and realistic and fire and aft stiffness is unparalleled. Torsional stiffness is as described in this interview….
Push Fork on a DIGIT bike, such a great matching aesthetic and it all works really well too. I paid to say the :0P.
Hope theyll be able to use companies like hadrian as us manufacturing spools back up
This looks inspired by Wren forks, but definitely a great product....I really hope they make a version for fat bikes,
maybe MTB forks are conventional as the height of the stanchion is seen as an advantage against rock strikes (or any scratch damage)? I can see these inverted forks constantly being scratched and needing replacement...
OK now please make a dual crown version!
Push vs intend vs wren?
what about mud gard mountings?
discussed at 50:54
I just use a mucky nutz guard on my downtube with my inverted fork setup. Works great!
Hopefully this does better than Trust Forks.
Optimizing costs would to work with casted crown and then machine it in a second step, would also increase throughput…
kamm tail aero sculpted uppers plz
Is this like motocross replica shocks?
How do i supposed to use a front fender
It's discussed
mucky nutz downtube fender also works extremely well with inverted forks.
kinda (like a lot) heavy for a trail fork no?
It does have a coil spring though
Wonder how the weight of this compares.
Fox 40 29" 2800 gr
Talking as if this is new tech... Manitou Dorado has been in existence for 20 years and quite frankly is the best DH fork on the market. Carbon upper legs, all that good stuff and almost a grand cheaper than this
Dang, that is sick but wow....2600! I don't see how they can survive with that price point, you can only scale so far in this market now. What a beautiful fork though, I can see the benefits of upside-down designs, the motorcycle industry has been doing it for years and years.
Countries are going into recession too😢
They sell plenty of their elevensix shocks, a lot of dudes I know with them have mtb as a cheap hobby compared to Motorsport or cruising in their boats. And those dudes are riding $10k+ bikes.
@@TheOtherPlayer well good for them, probably weekend warriors at best too. It’s one thing to actually ride as a passion compared to posing at the trail with a blinged out dentist bike.
@@TheOtherPlayershit, I have an ElevenSix on my sub $4k Ibis Ripmo AF. Wouldn't ride anything else after riding a Push ElevenSix.
Nobody thought a brand like Pivot would survive and thrive selling only >$6k bikes.
Lil' anecdote for you. For the last 17-18 yrs I've exclusively ridden a Marz 66VF without an arch. Within less than a year after buying it an ~ 4' fall off a wooden structure onto grass in my back yard somehow caused the flimsy cast mag arch to break off one side. A hammer broke it off the other. In the time since it has been run with 4-6 inches of travel for street, jumps, trials, rough double black QC DH\FR trails, gouged uppers, dented lowers, bent & broken steerers & not once, not only not an issue with "torsional stiffness" but not even a noticeable diff, even doing the stupid twist test. 🤔
The forces acting against inverted forks aren't torsional stiffness nonsense. They're the same forces at odds with gearboxes (the one other thing the MTB industry needs an Elon Musk to force it into), the same forces that $hitmano uses to design it's weaker than a limp dick brake levers, the same forces behind a marginally larger wheel diameter that required frame & (conventional) fork replacements, the same forces behind regressing from a 20 mm axle standard to 15 mm, the same forces that deliberately designed shorter lifespan light bulbs & the same forces that the sugar industry used against sat fat. Most of us know what it's really about. If an invert isn't torsionally stiff enough, then it just needs to be redesigned/resized so it is. Very simple. It's nice that there are peeps that care about the best possible equipment who are passionate about making better hardware, but tiny companies with minimal capital building high priced, low volume stuff won't make the world much better. Not that it was ever the goal, but it should be. The unfortunate paradox is that the corps that have the resources to do it right may have grown them by doing it wrong & they'll keep doing it that way as long as the profits are there. This looks like another great boutique product that almost no one will ever enjoy. You won't be a disruptor with this so, why should hardly anyone GAF?
It's too bad they didn't make that fork color a production option. Also interesting he didn't mention the testing they did with kashima, there was a photo showing the fork with kashima.
I mean I would pay up to 1500 for a fork like this….but for the love of god that’s pushing it.
No word about Intend iverted forks,I bet the got a few just to take a look hehehe. Very nice product overall,nice touch those quick bleed ports,that guy need a bonus cos I´m confident more brands would take note about quick fluid change,it is genius!
Think I'll go ride my dirtbike with KYB that was about 2600
One weakness I see is the stanchion guard. What if small rocks can get lodged in between the guard and the stanchion?
Could rocks not get lodged behind the arch on a traditional fork also? I guess it's rare rocks would get deflected up there. Interesting point though. Not sure.
@@chrisanderson8578 Traditional forks don't have stanchion guards so nothing can get wedged in like this design.
@@Domane-mh8wg I was thinking about the little gap behind the arch bit that connects the two lowers on traditional mtbs. I guess if something got stuck there that would also score the stanchions. I see your point though. I just think that enduro and motocross bikes have had forks with guards on for years and I guess it's not a real issue.
This finally enters into a realm where I can't justify it for cost. It's cool and all....but I'm sure my abilities as an average rider could not truly appreciate it.
When you go Enduro /DH ill be there ready to sell a kdiney for one
DH Fork next??
how can he say there's been no other USD fork on the market before like Manitou hasn't had the Dorado out since 2010 and has been getting updated to this day?
dorado has existed since right around 2000/2001 and we discuss previously made forks like marz RAC and rockshox RS-1 at 31:44
@@vitalmtb ahh I'm not that far in yet, at 8:20 he says no other dedicated invert fork I'm like come on dude don't do Manitou like that their fork is a beast!
Inverted forks in mtb are not a new thing. In fact with forks like the Rockshox RS-1, DVO, Intend and the even the lefty I might even go so far as to say it’s a well trodden path and a successful one too. Kudos to PUSH to acknowledging the benefits of the design and building on it but in no way are they pioneering this stuff in the mtb scene. (Though some of the features are super rad).
Just the way the interviewee explained how their idea came to be, inspired by the moto world sounded like a disservice to what’s out there already on the competitors’ side.
we touch on the marzocchi RAC and RS-1 (see the chapter marked "comparing to other inverted fork designs" at 31:44). no one ever said this was a new thing.
@@vitalmtbI retract my statement 😆
Can yu fit a mudgard?
50:56 fender is discussed.
@@vitalmtbIt's as if people are'nt paying attention :o/
What will all the brake dust that collects on that left hand side stanchion do? I would think that it’s extremely abrasive.
Works out about 1$ per gram . Not great from either standpoint.
If you want to know what direction the bicycle industry is going to go , just look to the motocross industry , we need FOX to step up and finish the job with a true inverted fork
No fork is worth 2600 dollars. Not to me.
he has not heard of the Durado,, how sad Manitou 😅
Spomor, are you training for a Tri ? Love the hat, let’s go swimming!
I wonder if the fork can use 220 Rotors? I have an eBike and I use a 220mm rotor because it has to stop a 54 lb bike and Rider...Cool looking fork though...$2600??? Ouch!
1:20 podcast? I could develop a fork in less time.
They can keep those for that price. Ill stick with fox at half the weight and a third of the price
One reason that non-inverted is so engrained in mtb is because that’s how they all had to be designed to allow rim brakes. Also, mtb are smaller scale, and need to be light compared to a motorcycle. It’s a motor moving the mass of the fork around not a human. With disc brakes, and really crazy technology nowadays, an inverted mtb fork seems more than possible to break into the market….even though the RS1 disappeared fairly quickly. Maybe it just takes too much investment to change the way things are…even if it is better. Happens all the time.
hard competition from Intend which costs $400 less