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Custom Built to Spec Electric Unicycles Now Available


Austin Marhold
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People know me and have seen in the prototype in person, my specs are real.

Current build:

  • 520wh
  • 4000w motor
  • 12 in x 3 in (fat tire)
  • 32 mph / 50kmh
  • Next level smoothness and intelligence algorithm response (gw feels like it's from the stone age after riding this)
  • energy consumption typically 11-15 wh per mi at 12-15 mph, up to 25 wh/mi consumed in worst case at 20-30mph
  • pedals 5.5in from the ground, can go over a curb easily, never pedal clip during turning

Private message me for video etc.

Not Cheap.  Not Slow.

Next Gen for preorder:

  • 1600wh+
  • 8000w motor
  • 300lbs + capacity
  • 12 or 24 in tire (made to order)
  • 30mph+
  • Designer shell
  • anything you can imagine per order

 

Add me on FB and shoot me a message if you want more info.

facebook.com/austin.marhold

D8.80.jpg

Edited by Austin Marhold
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  • 2 weeks later...

@Linnea Lin Gotway @Jane Mo @Diana@szkingsong.com @Jason McNeil

You guys might want to take note of this up and comer with the crazy specs... the possibilities of a joint venture or custom build might be very interesting... The not cheap part does worry me a bit though...

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Love the spec's on this wheel and the energy efficiency of the motor.

"not cheap" will probably scare most people away, including me :(. If anyone ever gets wind of the cost drop a line here.

Unfortunately I'm probably stuck using the production models from China :crying:

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Difficult to say whether this guy is the real deal or someone who took an IPS A130 turbo, stripped the shell off, created a custom shell, upped the pedals, and is promising vaporware?   People with the proper credentials usually will mention where they received their education, but I don't see any mention of any electronics engineering degrees.  There is mention of some 3D graphic modelling on his portfolio.  Maybe he's more a conceptual artist and 3D Render expert who has some contacts who can help put together a wheel based on his creative designs?

http://portfolioaustinmarhold.weebly.com/

How do people determine the wattage rating of a motor?  1900 W (eg. Gotway Tesla) vs 4000 W seems quite a jump in specification.  I think I have to reign in my enthusiasm a bit more at this point as something doesn't quite add up.  Unless maybe he has a lot of contacts in both mechanical and electrical engineering who he draws upon, it will be interesting to see if the product lives up to the specs put forth.

EDIT:  The more I look at the design, the more I think that those triangular modules most likely are battery packs?

Edited by Hunka Hunka Burning Love
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4 minutes ago, Hunka Hunka Burning Love said:

Difficult to say whether this guy is the real deal or someone who took an IPS A130 turbo, stripped the shell off, created a custom shell, upped the pedals, and is promising vaporware?

I was kind of thinking the same thing, but it seems to have much faster acceleration and speed than a cheap wheel with a 260wh battery.  Who knows, it might be his riding skill that gets the most out of the wheel.  It'll be vaporware to me until we see more evidence.

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From the earlier videos of him on the Gotway 8" and 10" wheels, it's clear that he loves the agility of the the small wheels. So that's probably why he has created this 12" wheel. It's still very small which helps a lot in the agility department, which he is aptly demonstrating in this last video.

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Cautious! Heck with that, we are the people who are riding around on one wheel, cuz we're cautious. I will eagerly await your Kickstarter and send you money when its available. Contact me Direct if you want to build me a prototype. It's about time we got American Ingenuity on this thing.

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18 hours ago, Marty Backe said:

Love the spec's on this wheel and the energy efficiency of the motor.

"not cheap" will probably scare most people away, including me :(. If anyone ever gets wind of the cost drop a line here.

Unfortunately I'm probably stuck using the production models from China :crying:

Cheap, reliable, fast.

 

You can choose 2 out of 3 :lol:

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6 hours ago, ir_fuel said:

Cheap, reliable, fast.

 

You can choose 2 out of 3 :lol:

I'm certainly OK with it not being cheap. Let's just hope it's semi-competitive with the current crop of performance wheels.

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11 hours ago, KingSong69 said:

That's a 2800-3000Watt charger....against our 120Watt ones nowadays...would blow my fuses at home :-)

My breakers are rated for 16 amps which gives me about 3.6 kW on a single outlet. With SMPSs reaching North of 90% efficiency, I don't see any problem here.... Just don't use that toaster on the same line at the same time.

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Most of the specs sound very good, but the 12.5" wheel size would prevent me from backing the project in the first round. Although the power and torque, and perhaps electronics, can compensate to some extent, I would still want (wait for) a larger wheel.

As for price, I think much of it depends on delivery date. If you can deliver a superman wheel before next summer, your chances of success will obviously be much greater, as competition will need time to (appear to) catch up. I think there would be some buyers at up to 3-4k if you can deliver soon.

Also, I hope you can get a reputable site to review a prototype like arstechnica, although their piece on the Solowheel was underwhelming.

Good luck, we're rooting for you.

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Charger math is simple:

Standard use case considered is the psychological block that keeps people form is discharging below 35% due to fear of running out of power (although you could go to 0% usable safely).  Therefore you can consider that a fast charge to 85% is only 55% of the batteries cap (1600wh - 55% = 880wh) in 30 minutes is totally believable)  1 hour from 0%-90% would also be reasonable.  The point is it will charge within a standard social setting or cup of coffee, therefore definitely real-world fast charge.

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5 minutes ago, Austin Marhold said:
Any further vapor ware concerns? lol... go do this on any other device in the world and come back to complain about my impossible spec. ;)

Commercial vids are usually not particularly insightful to resolve disputes over design specifications and capabilities. This one is no exception, AFAICS. Just saying, I wasn't the one disputing the specs.

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5 minutes ago, Austin Marhold said:

Therefore you can consider that a fast charge to 85% is only 55% of the batteries cap (1600wh - 55% = 880wh) in 30 minutes is totally believable

Then why not write from 30% to 85% to avoid misunderstandings? Many of us know that charge rates above 1C are problematic with common battery technology. Out of interest, what are the specs of the charger you are using with the wheel most of the time right now?

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17 minutes ago, Austin Marhold said:

Any further vapor ware concerns? lol... go do this on any other device in the world and come back to complain about my impossible spec. ;)

Again, I'm hoping for your success because that means potentially another great wheel for me to ride. But I saw nothing in this video that made me go "Wow". I must be missing something :confused1:

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