Forget Dropper Posts, Black Math Bike Created a Dropper Frame

Mar 6, 2024 at 8:32
by Aleksander Margolis  
Every once in a while a press release comes through that makes us take a double (or triple) take. That's the case with this announcement from Black Math Bikes. The Polish company has apparently created a bike with a handlebar mounted remote that turns it from 140mm trail bike into a 170mm descending machine. There's no traditional dropper post - instead, the top tube moves down to get out of the way for the descent.

It's certainly unlike anything currently on the market - read on for Black Math's description of their creation.
- Mike Kazimer

Photo by szachimat https www.blackmath.bike
Photo by szachimat https www.blackmath.bike
GCode is 2 in 1 MTB frame. Simple as that

PRESS RELEASE: Black Math Bikes

bigquotesWriting it truly feels unreal, but I have just fulfilled my childhood dream of running my own bike company. When I signed up for this Pinkbike account, I was a typical Eastern Europe dirt jumping kid, who loved the thrill of riding sketchy jumps all over Poland, making friends on the road, and drawing my first bikes. Long story short, we are 15 years later, I made a degree in design and worked on multiple bikes for different companies and a few for myself, but two years ago I started a project - Black Math. Along with a few friends from the dirt jumping period, we teamed up, gathered funds from the EU startups program and here we are with a GCode - a bike frame that will turn heads on the trail! This project sat in my head for far too long, and after riding it, I can once again say: that my dream came true! Designed and produced in Poland, rides way beyond my imagination and does not look like a Session. Let's go!Aleksander Margolis

Black Math Bike is a bunch of geeks with deep roots in the bike industry. We're passionate about reimagining bicycles for a better future. Black Math Bikes focuses on innovation, sustainability, and quality in our low-key approach to cycling improvement.

We introduce the precisely crafted kinematic system that allows you to change your bike from an efficient 140mm travel trail bike to a 170mm travel shred weapon on the run.

How does it work?

The Upturn Dropper is controlled with a regular thumb-operated lever. Still, instead of a classic telescopic seat post, it uses a set of links located at the top tube end, creating a virtual pivot point system.

Photo by szachimat https www.blackmath.bike
Photo by szachimat https www.blackmath.bike

This allowed us to precisely design the movement of the seat, including the change of the angle. But the real magic began when we integrated seat adjustment kinematics with the four-bar Horst Link suspension. Now, we can adjust the geometry and suspension performance due to the change of seat position.

Lowering the seat sets the whole bike in descent mode - the head angle becomes slacker, the bottom bracket drops, and the suspension attains 170mm of travel with a 33% progression rate. Raising the seat transitions into climb mode - steeper head angle, higher bottom bracket (and clearance), and reduced suspension travel to 140mm. A shorter travel with the same shock setup results in less sag and a firmer suspension feel, providing stable support during intense pedalling. It's like combining the benefits of Aenomaly Switchgrade, Flip-chip, and Climb-switch, but without any extra effort. You use the dropper as always and enjoy a bike that offers unmatchable possibilities!

Photo by szachimat https www.blackmath.bike
Photo by szachimat
The frame opens and closes on the separate gas chamber hidden under our prototype piece of cloth

Meet GCode frame:

GCode - a standardized language for recording commands for CNC devices. The bike's name pays homage to the contemporary craftsmanship of the 21st century, indicating our dedication to technical perfection, precision, and the highest quality.

Key features:

We start shipping preorders in the beginning of 2024 season, but first of all, we want to triple check on everything to make you smile while unpacking the box!

bigquotesAt BlackMathBikes, we're more than just a niche MTB business. We're passionate local riders pushing the boundaries of innovation. With our 'GCode' Frame, we challenge the industry to rethink what a mountain bike can be. We believe in critical innovation to create a better riding experienceAleksander

Photo by szachimat
Photo by szachimat

Why CNC?

Due to the frame geometry adjustment, it consists of smaller parts connected through bearings and screws. This type of design is well-suited for low-volume production using CNC machines.

It offers us several advantages:

Technical:
Ultimate overall precision.
We can use the unweldable 7075 alloys, nearly twice as strong as the alloys used for welded aluminum frames.
We can precisely manage the compliance of the construction structures. Downtube uses adhesive joints to improve the torsional stiffness of the front end.

 szachimat
 szachimat

Quality:
By eliminating manual technological processes, we reduce the possibility of errors caused by human factors. This reduces the risk of quality issues.
In-house production gives us control over every aspect of production.

 szachimat
 szachimat

Environmental:
Frame divided into smaller components reduces the consumption of large aluminum blocks compared to other CNC technology frame producers.
We produce locally, in Poland.
We use highly recyclable materials.
Splitting the frame into smaller components makes repairs easier after damage.
We can ensure the availability of spare parts.

For a deeper dive into our mindset and offer - please jump into our website or follow us on social media for monthly updates! We are all ears for you, so don't hesitate to contact Black Math Bikes!

Author Info:
kapitankajdan avatar

Member since Mar 1, 2008
1 articles

195 Comments
  • 364 1
 This is probably one of the coolest displays of bike over-engineering I've ever seen
  • 58 0
 The “prototype piece of cloth” keeps the engineering subtle though. Smart boys.
  • 11 46
flag monkeybizz (Mar 8, 2024 at 5:26) (Below Threshold)
 Not really, you’re just increasing the points of failure. It’s better isolated in the seat post itself. It’s one of those “we engineered around theory instead of practicability” situations.
  • 62 0
 @monkeybizz: Sooo….you‘re saying it‘s overengineered?
  • 14 0
 Now we just need a version with the Supre drivetrain for maximum engineering.
  • 1 0
 @isla0xtkpiq45ulaey2: well hang on there- I’m saying there’s more moving parts and it would be better with less moving parts Papi
  • 7 1
 @monkeybizz: Well AKKsheeeeuuulllllyyyyyy
  • 2 1
 Overkill is better than underkill, I suppose.
  • 6 0
 @broscience: Ill be honest, at first couple looks it blended into the background so well I didnt even notice it!

I think its great,
keep building cool things and putting it on the internet. Big props from me!
  • 2 0
 @CamNeelyCantWheelie: If it includes RS suspension, can we call it Maximum Super DeLuxe engineering?
  • 3 0
 @CamNeelyCantWheelie: Shoot
Can we call it

Maximum Supre Deluxe Engineering?!

Ill see myself out....
  • 2 0
 Yeah and I like when people just think out the box.
  • 1 0
 It ain't pretty, but....
  • 183 3
 Cables not routed through the headset. Decently acceptable access to the shock in one of the frame positions. I'm willing to have a conversation.
  • 27 1
 I hope they have a booth at Otter, would be sweet to try one out.
  • 9 57
flag Glory831Guy (Mar 7, 2024 at 20:55) (Below Threshold)
 O hell no! This thing looks all kinds of janky. Y'all trippin as hard as this bike's designers.
  • 4 0
 Yes, fully shape shifter, Its even matching ..... theorists . But,Im jealous of shapes of those frames. Not me yet...
  • 170 1
 Honestly a pretty cool idea, creativity is off the charts
  • 145 0
 Waking up to see our bike on the front page of pinkbike and reading your comments is one of the best feelings our small team could get after years of developing this idea! Big love fellow pinkbikers! Now back to work - @black_math_bike on IG for monthly updates as we prefer to polish the product rather than take BTS cnc selfies
  • 28 0
 Polish the Polish product
  • 6 0
 Nice work you guys. That had to be such a fun project to work on. I cannot imagine the satisfaction in seeing it through. Nicely done.
  • 5 0
 What a great article to wake up to this morning! Looking forward to watching the progression of this bike and your company.
  • 8 1
 @mi-bike: The dad in me now wants to Check the Czech product and start Rushin' the Russi-
Shame on you, @mi-bike , look what you've done. . .
  • 9 0
 This is heart warming. And love to see you're a member since '08... a genuine bike nerd making things happen. Good luck to you guys hope to see some transformers on the trail!
  • 2 8
flag gabiusmaximus FL (Mar 8, 2024 at 10:12) (Below Threshold)
 I too am a fan of the effort that has gone into this, and hence I mean this in the kindest way possible... This bike won't sell. It's too unusual, you might sell one or two to curious rich guys, but it simply isn't going to be the start of something big. Massive props for the effort, but please don't sink too much money into this unless you have a serious fall back plan. This project is not going to pay for itself.
  • 1 0
 This is a rad idea and I hope you can make it work. Congratulations
  • 1 0
 This design is pretty incredible. Will you have a booth at the Sea Otter Classic? I would love to see this bike in person.
  • 1 0
 @rrolly: A young backpacker met up with three other tourists in a hostel and after too many drinks they ended up playing strip poker which lead to other things...

The next day, when she was telling her BFF the story, her friend asked, "well, how was it?"

"meh, it didn't last long. They were Russian, 2 Finnish."
  • 100 0
 Definitely doesn't look like a session
  • 25 8
 Looks like a v10 tho
  • 5 0
 First thing that comes to mind is the Scarecrow played by Cillian Murphy...
  • 52 0
 This is a great idea if it works but holy cow that's a lot of new variables to sort out all at the same time.
  • 37 0
 It's still less complicated than the history of the White Stripes
  • 11 0
 @ceecee: I’d like to to meet ma wife and my sister. Say hello darlin!
  • 1 0
 Interesting for sure; center of gravity maybe high in up position?
  • 49 0
 Shapeshifter on Steroids. Great to see some out of the box thinking and innovation. This is how the industry and how engineering progresses, not by cookie cutting and copying each other incestuously
  • 42 0
 Crazy bike but I don't hate it
  • 31 0
 The creativity is amazing and should be applauded. I'm curious for the weight as well, and I suspect that's where there may be an issue. Won't climb like a 140mm trail bike if it weighs 40 lbs. Although at the pace we're going trail bikes will be there soon. Of course if the point is to make a 170mm enduro bike more efficient on the climbs a lockout switch may suffice...
  • 5 1
 Curious what the weight is too. But man my 210 oneup v2 dropper is heavy. A few extra bearrings at the top tube might be kinda comparable?
  • 6 0
 I think the biggest issue will be lateral stiffness, both at the rear wheel and the shock. That and handling all the forces that'll be going into the top tube. It looks like the camo'd dropper thingy is the only thing stopping the top tube from shooting into the rider's crotch on a compression. That said, I do love the creativity here
  • 31 0
 Canyon and Scott both just dropped their beers...
  • 27 0
 Scott must be frothing over the opportunity to add another remote to the cockpit.
  • 22 1
 This is friggin rad! To repeat what @Superboost said, "If I had tons of cash I would buy one of these just because."

Man, I really want to ride this bike to see how it feels and where exactly that saddle nose is pointed.
  • 22 0
 Honestly, if I had tons of cash I would buy it just because. Needs carbon tri spoke wheels though. And a Trust fork.
  • 25 8
 "we challenge the industry to rethink what a mountain bike can be" - if there is one industry that does not need help in coming up with very complicated solutions, it's the bike industry.
Maybe someone could come in with a challenge of simplicity, so that we don't end up with 10 bar linkage suspension in 2040?
  • 15 0
 Orange has been doing that for quite a while.
  • 10 7
 @Ousqa: probably not for much longer though
  • 23 2
 Joke: How do the Polish raise their bike saddle? They lower the frame!
  • 15 0
 Crazy to think about it, but there are more chance of me buying this bike than a Ransom with headset routing
  • 13 0
 Every picture of this bike raises a hundred questions. You have to get one in on review.
  • 1 0
 Yes please Pinkbike! Big Grin
  • 10 1
 I want one of these. I REALLY want one of these. Such a crazy bike a creative design solution. If something like this catches on and become more popular, I want to have the first. If it doesn’t catch on, I want to have one of the few.
  • 13 0
 Bionicon and Pole had a baby
  • 12 0
 Where do you mount the vodka?
  • 6 0
 Safely in the CamelBak.
  • 5 2
 In Russia
  • 4 0
 @mi-bike: how dare you sir! Any drunkard knows Polish vodka is far superior to Russian swill!
  • 9 1
 I'm tired of the G91 changes in the bike industry that just seems to G04 in the past. This is G90(ly) what we need.
Maybe those of you who are so closed minded about this need some G43.
Good luck Black Math, I'd G73 it.

M02
  • 8 0
 Very interesting concept. Their website shows how the geometry and saddle drop changes throughout the switch in riding modes. It's odd that they didn't show this info in this press release.
  • 7 0
 This looks pretty sweet-and if it works at this scale it could work for shorter and longer travel applications too!

It’s the first bike to live up to being innovative and new in years.
  • 5 0
 This looks brilliant

My only worries are that the gubbins under the cloth better be well sealed because its right in the line of fire from the back wheel

Im getting cybertruck vibes from the raw finish and angles on frame tubes (tho Aleksander sounds way less of a bellend than the guy behind that)
  • 6 0
 Apart from arguable yet interesting innovation, this article shows that PB comments section is alright. It’s industry that’s f**ked.
  • 7 0
 This needs to be in the next huck-to-flat video.
  • 1 0
 And in the Enduro World Cup
  • 4 0
 pretty dang awesome that something like this happens instead of just incremental new ideas (not necessarily better ideas). Wonder how wobbly it feels though with so few long rigid pieces across the total length
  • 4 1
 So it’s basically a clunky beefed up version of a Strive? However, once you have gone up the trail or down for anything in between you need XC skills for flow trails as there is no dropper to prevent the seat rupturing your sphincter. Old school.
  • 3 1
 Yeah it's definitely designed for a very specific kind of ride where it's all up or all down and nothing in between. There are so many situations I drop my seat that I wouldn't want to go into full transformer mode, like going up and over obstacles and technical climbs and quick hits on the side of a trail and a hundred things. I also like to sit on my dropped seat when I'm chillin for a minute for whatever reason without actually getting off my bike (that's just a lazy convenience though). I'm curious how quickly it goes from one form to the other vs down/up on a dropper. Seems like it would be a longer transition but maybe not by a significant degree. Hope we get to see it in action soon.

Not hating on this bike at all btw, I actually think it's really f***ing cool with clearly impressive engineering and creative people behind it. I'd love to try it out. Just saying it isn't suited for every type of ride/terrain you might use an enduro rig for. But they know that. They even describe themselves as a niche MTB business. So more power to them. I hope they make it and I get to see one in the wild someday!
  • 3 0
 I oddly love it. Two things I am worried about: weight and that linkage up by the headset. I have the feeling that the bushings of that linkage will be gone in no time due to how the loads will hit there.

subscribed to the news letter, I hope it will actually come out!
  • 5 0
 Love to see something new on the market. I hope they find some success.
  • 2 0
 What kind of seatpost do you need to run to make sure the minimum insertion is sufficient? This looks like it will snap either the frame or seatpost on a heavy hit to the saddle.
  • 2 0
 I want to say something clever/crafty but all that comes to mind is that if this bunch wants to tinker and they are enjoying the process, have at it/who am I to stand in their way.
  • 1 0
 Mad props, really... I could have seen and imagined myself too over the years and during my design studies, concepts of 2 bikes in one or toptube/seat combined. But I never saw something coming real nor felt the bike industry taking the gamble of this path. Seeing that working and actually has a nice stance is just so great, very nice job!
  • 1 0
 I'm really impressed they've mangaed to incoperate so many good features with minimal compromise, usually achieving one thing leads to another being sub optimal, only down sides i can see is it's ugly in climb mode but thats solved by it looking good in descend and that added multi link pivot at the front of the top tube adds a bit of complexity and maintenance.
  • 1 0
 Totally badass idea! Checkout the geo charts longish chainstays and headtube, which is what i prefer.

"The bike's name pays homage to the contemporary craftsmanship of the 21st century, indicating our dedication to technical perfection, precision, and the highest quality."
  • 1 0
 Assuming the shock doesnt behave drastically different at the two travel leverages the only thing I think that would make this perfect is somehow getting enough room to fit even a wireless dropper post in it. Even on climbing up them bombing down trails there is still some small short downhills or flat sections that you wouldnt want to go full transformer but just drop the seat for short sections. Hell just sitting on my bike taking a break a dropper is very convenient.
  • 1 0
 This reminds me of an idea I've had for a while. A suspended and heavily damped single pivot headtube. Only a few mm of travel, but just enough that it unweights itself while climbing to steepen the headtube, and when pointed seriously downhill, the weight of the bike and rider move the pivot enough to slacken the headtube angle in real-time based on the trail.
  • 1 0
 What can I say; as unorthodox as it is, I do like it. It's a cool idea that seem well executed and I wish them all the success with their project.

That being said, this whole concept opens up an entirely different can of worms in regards to geometry, dynamic weight distribution, linkage rate, shock tune, etc. I haven't yet made up my mind wheter this is even a good idea to begin with. There's a lot of stars that would have to align in order to make this bike handle well in both modes.

Also I think I would have preferred a bike with a more conventional, non-adjustable layout -- but constructed in the same way as this, with CNC'd and bonded tubes of AL 7075. That would probably have been a more popular approach.
  • 31 27
 April 1st is early this year?
Must be the gobble warming.
  • 54 0
 isn't gobble warming just cooking a turkey?
  • 17 0
 @DylanZ91: I’m no longer confused by this bike…just hungry
  • 5 28
flag BuntyHoven1 FL (Mar 7, 2024 at 16:23) (Below Threshold)
 Oh come on, this makes way more sense than global boiling.
  • 6 2
 So how flexy is it on a scale from cooked pasta to a banana?
  • 4 0
 Black Math? More like Black Magic.
  • 2 0
 Black Sabmath?
  • 3 0
 I love new and weird bike stuff like this. I'm excited to see what happens!
  • 3 0
 Waiting for the Pinkbike presenters to start.complaining about how it's not enough drop.....
  • 3 0
 “Prototype Piece of Cloth” is my new industrio-core mumblerock band name.
  • 4 0
 Congratulations on bringing your dream to reality. I love the idea
  • 1 1
 I love the idea! I can't look at that loooooong seatstays tube but the idea is great. Hopefully, the pneumatic mast is if their own design and it can be easily serviced because forces that hydrolock in the mast is going to hold in high speed impacts will be huge.
Why didn't they go with short link rear suspension with another linkage actuating the shock against top tube?
  • 2 0
 THE most innovative full suspension concept I've seen! Who thunk it? The Polish of course. Where's the video on the website??
  • 1 0
 Surprised that the first and most upvoted post was not "kill it with fire". What have the pinkbike commentsection become? Is this a case of the Stockholm syndrome or boil the frog slowly? I really can't tell ‍♂️
  • 3 0
 Any info on geometry numbers or effective saddle drop?
  • 6 0
 Geo chart is on their website. Seat tube length (effective) DH mode:394/ Climb mode: 535
Also lists the "dropper" as having 200mm travel.
  • 3 0
 Would love to see some charts and graphs for that suspension.
  • 3 0
 Its on their website, just keep scrolling down and you'll see it just after the geo charts.
  • 3 2
 Next someone will design a wheel that converts between a 27 and 29er. 29 for the climbs, flip a switch and bam, a 27 for the descents.
  • 1 0
 I mean… I’d buy a set
  • 1 0
 I hate that I don't hate it. Definitely a cool concept that will unfortunately be hard to scale to something outside of the ebike weight range.
  • 1 0
 Wow, so cool but I think I'd still want the dropper ability. I'd love to see this bleed into conventional bike designs in the future.
  • 1 0
 I like it! I won’t buy it, but I’d oogle over it at the trail head and talk about how cool it is. Love the industrial look and wild idea.
  • 3 0
 Dropper posts are so 2023... dropper frames for 2024!
  • 1 0
 This company is so cool and I think the new name is awesome! Definitely reflects their core values and the video on their website is hilarious!
  • 3 0
 honestly this is f*cking sick as a project/prototype engineering study
  • 3 0
 Amazing, love the innovation
  • 3 0
 Reminds me of the old Bionicon bikes... except this actually looks good.
  • 3 0
 The Bionicon was actually bloody good, i owned a SuperShuttle and it was ace fun in the Alps... Although the bugger did creak and creak.... But it rode great and the concept of the uppy-downy stuff was superb.
  • 1 0
 @weeksy59: such a cool concept for it's day! I just couldn't get past the aesthetic.
  • 3 0
 I like to cheer new innovation but this contravenes the KISS principle.
  • 2 0
 Gotta love the waaaaaaaaaaaaay out of the box thinking. Would be something else if in 10 years all bikes were like this.
  • 3 0
 Watch out Knolly. They're coming for your 'sketchy math' award.
  • 1 0
 Why not?

Reminds me of my old pull-shock Jekyll, trigger actuated travel and geo adjustment. Still less complicated than TwinLock.
  • 2 0
 I did a double-take at the phrase "gas chamber". Probably best to call it a "pneumatic chamber".
  • 1 1
 I know it's pedantic, but I think a pneumatic chamber must specifically be air-filled. I get the impression that their "gas chamber" is like nitrogen-charged or something. But yeah, also, not a great term to be using, historically speaking.
  • 3 0
 Not sure we needed this… but A+ for effort
  • 3 0
 the cybertruck vibes are strong with this one.
  • 2 0
 Please review this as part of the next enduro bike field test. Or trail bike field test.
  • 1 0
 I think it's gonna need it's own field.
  • 2 0
 My Ransom already uses a handlebar remote to go from 120mm to 170mm. 0mm too.
  • 1 0
 I don't understand the point of drastically changing the travel like that. Probably something you have to experience in person. Not a fan of the looks. To each their own.
  • 2 0
 Definitely wait and see...but this is the most interesting thing I've seen in a while. LOVE the thinking outside the box.
  • 2 0
 No matter what you think about looks, if one was sitting in front of you, 100% chance you'd do a test ride.
  • 1 0
 Anyone remember the bionicon supershuttle? I knew a rider who lived the variable geometry. And this concept seems even better - less hydraulic lines, for one
  • 4 2
 Look cool but also looks damn heavy.
  • 2 0
 why walk when you can do cartwheels?
  • 2 0
 Something ugly climbing, turns into v10 descending
  • 2 0
 Very, very different than girl math.
  • 2 0
 At first I thought it was April fools and that was a stick
  • 2 0
 It looks like it has a stick up it's ass
  • 2 0
 Hmmm this would be pretty rad with that Aenomoly adjustable saddle!
  • 2 0
 this is aesthetically displeasing and pleasing. engineering; amazing!
  • 1 0
 the masses yearn for the Canyon Strive (if it could be serviced without printing my own custom presses)
  • 2 0
 Really cool to see this truly original machine Aleks!
  • 1 1
 Although I’m struggling to like it’s looks, I like the concept, the geometry and cool-factor.

I would give one a demo for sure!
  • 1 0
 But can it fit a water bottle? From the looks of it, I don't think so. Lol.
  • 1 0
 That linkage/seatstay/top-tube thing must make it feel like you're riding a frame thats snapped in many places.
  • 1 0
 To me it looks like you will need very high shock pressures for this to work.
  • 1 0
 now we just need a way to make the tires lighter for the ride up at the push of a button
  • 2 1
 I need to win the lottery.....
  • 2 0
 ...drop it like its hot?
  • 1 0
 The antithesis of the hardtail.
  • 1 0
 Great idea, I'd love to ride one! Shapeshifter, but now the real thing.
  • 1 0
 yes but does it fit a dropper?
  • 1 0
 Good or not, I'd like to see something new and creative, isn't it?
  • 2 0
 FUGLY!
  • 1 0
 It’s giving big Soft Ride vibes
  • 1 0
 Dennis Reynolds to Mac

"Don't make me go get the bike"
  • 1 0
 Looking at that bike hurts my brain. That is a true feat of engineering
  • 1 0
 This looks wild! i like it!
  • 1 0
 Very cool concept, but shock side-loading is a big problem here.
  • 1 0
 This is sick looking bike :O
Reminds md of scott gambler 20.
  • 1 0
 Yes, but does it blend??!!
  • 1 0
 Dude jumped over a whole country?
  • 1 0
 I personally wouldn't buy it but it's hella creative!!
  • 1 0
 Now, they just need to make it so it accepts a dropper post too.
  • 1 0
 Sweet bike! Definitely needs a Push fork.
  • 1 0
 Need a video of this in action
  • 1 1
 Finally someone who did this obvious innovation. Now refine the design and make it cheap to manufacture
  • 2 0
 Rear end looks flexy....
  • 1 0
 It’s an Autobot, I will call him Singletrack
  • 1 0
 Finally something interesting happening in the mtb world
  • 1 0
 Now this is cool! This is how the bike is reinvented tup
  • 1 0
 Is it a decepticon or an autobot?
  • 2 2
 there's a "hold my beer" joke in there somewhere
  • 4 4
 "I don't want to live on this planet anymore" - Professor Farnsworth
  • 3 0
 holler at elon
  • 5 5
 It's not April 1ST yet...
  • 2 2
 Looks like fucking real life AI
  • 2 1
 beautiful frame
  • 1 0
 Jeckyll.
  • 1 1
 Somebody forgot to do the maths on that one.
  • 1 0
 It's a lowrider!!
  • 1 0
 Ew
  • 1 1
 No astroturfing is a big plus
  • 1 0
 black math matters..
  • 1 0
 Nice Concept
  • 1 0
 Okay I want to ride one.
  • 1 0
 this is very cool.
  • 1 0
 Anyone spot a price?
  • 1 2
 *polish disdain intensifies*
  • 1 1
 Looks so sick
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