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About Asphalt

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    KS-18XL 2200W, MCM5, V8, V5f

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  1. This article is about an emerging gyroscope IMU (Inertial Measurement Unit) technology that’s 10,000 times more accurate than current comparable IMUs. https://www.hackster.io/news/tiny-glass-gyroscope-will-boost-inertial-measurement-accuracy-by-10-000-times-researchers-say-0b3095411fa7 Do you think that improvements to IMUs will benefit EUCs? Perhaps it will enable a more precise feeling of control? Or perhaps it can be used to develop a more accurate method of crash detection, better than the rather blunt 45-degree sideways tilt cut-off that’s currently the norm? Maybe it’s fast and accurate enough to enable active suspension that senses bumps and immediately adjusts a suspension system to accommodate? Any other ideas?
  2. Gotway’s statement on the shrinking EUC market would appear to be supported by Ninebot’s exit and all the major remaining manufacturers diversifying into eScooters, esk8 and eBikes. I wonder how much of this is due to the shared eScooter backlash affecting public opinion on micro mobility and laws banning PEVs in some countries? It comes down to us, EUC enthusiasts, to be advocates, evangelists and positive role models for the general public because the EUC manufacturers certainly don’t have the marketing departments required to grow the market. If we want better wheels, we need a growing market. There are many ways to encourage this: 1. We can try Marty’s approach by trying to single-handedly prop up the EUC industry by purchasing every wheel available. 2. We can try Marty’s approach by making great social media content showing the fun aspects of EUC in a responsible way. 3. We can go after the “cool” factor by showing extreme possibilities of EUC for both tricks and high-stakes performance riding. 4. We can try to introduce EUC to a high-profile celebrity in hopes of them promoting it e.g. Casey Neistat and Boosted Board. 5. We can support community members on their way to becoming the next Casey Neistat. 6. We can take the time to have positive interactions with the public when stopped and asked for the thousandth time about that thing we’re riding, how fast it goes, how much it costs, and if you get a good core workout. It worries me that the EUC market is shrinking, because it seems so counter-intuitive. With all the issues the world is facing with climate change, urban congestion, and social distancing; the EUC checks many boxes. We need to show the world that overcoming the fear of learning how to ride and looking socially unusual is worth the many benefits of EUC. Unfortunately there are many (like my wife) for whom the barrier-to-entry is too high for factors like “it’s not the right colour”
  3. I upgraded my 18XL with the 2200W motor, so I'm selling the original 2000W motor. Could be useful if you've bent your rim, or have a flat and don't want to fuss with a tire change - just replace the whole motor-tire assembly. It comes with the original tire and tube already installed on the motor. The tire has been used for 1000 miles and is still in good condition.
  4. Asphalt

    MSuper Pro?

    Does anyone know the Kv rating on the MSP motor vs the MSX motor? Seems like Gotway didn’t maintain the Kv when changing to the MSP 2500W motor from the MSX 2000W motor. If so, they went with thinner wires around the longer magnets, to produce higher torque, at the expense of speed.
  5. Thank-you for this informative link. This is the first time I’ve heard of hysteresis grip. Do I understand hysteresis grip correctly? - As the rubber compound loads and unloads, some of the energy becomes heat which softens the rubber, improving adhesion grip. For interaction with the road, undulations in the road surface cause loading and unloading on the tire surface which begins the hysteresis process. Am I interpreting the article incorrectly or are both hysteresis and interaction with road surface both sources of additional adhesion grip? I’m not trying to be argumentative - my interpretation may be off...again I appreciate everyone’s time in contributing knowledge to this discussion. Hopefully this will eventually lead to more informed decisions about what we want out of an EUC.
  6. @mrelwood Glad you watched the video before posting your opinion. Apart from #7, which I agree has more to do with tire profile than width, do you disagree with any of the other takeaways?
  7. Fortnine made an interesting video putting a car tire on a motorbike. They go over the physics of wide vs narrow tires. While this is an extreme example, it should shed some light on tire width discussions. There's been a recent trend by EUC manufacturers towards wider 3-inch tires. Most notably with the 3-inch on the KS-16X vs the 2.5-inch on the KS-18XL. This video does a good job explaining the cause of the "gyro effect" felt on the wider tire. My takeaways from this video are: Wider tires can handle more load, so are better for heavier riders. Wider tires are more stable in a straight line. Wider tires have more flotation on soft terrain, so shouldn't sink as much. Wider tires are more stable when braking. Wider tires track more to the road surface, following depressions in the road, less responsive to rider input. The wider the tire, the greater the gyro effect when turning, requiring "counter-steering" (or whatever the equivalent is on EUCs) throughout a turn. Wider tires will grip less in a turn because some for the grip force goes towards countering the tire wanting to stay flat. Friction force is independent of contact patch size. It is only dependent on the coefficient of friction and the normal force. Wider tires should last longer due to heat distribution and having more material. Overall, wider tires will run cooler, last longer, but handle poorer. I like that EUC manufacturers currently offer a wide range of tire widths. I just hope that the trend isn't only towards wider tires.
  8. Asphalt

    MSuper Pro?

    We’ve had too much British influence around these parts lately. Now if Harry and fam started riding EUCs, then maybe I’d change my mind. Also, apparently British women prefer Foxy scooters over EUCs - you gotta do a better job converting the fairer sex If you do a review of how the MSuper Pro holds up in rainy British weather, then I’d definitely watch that video.
  9. Asphalt

    MSuper Pro?

    The jump to the stronger motor and 21700 batteries likely necessitates a new control board and firmware. There’s going to be more heat as well, with the dual headlights and potentially higher current draw with the new motor-battery combo. That’s a few too many possible failure points for my liking. I’m waiting for Marty’s Overheat Hill and range tests, Kuji’s max acceleration, braking and jumping tests, and Chooch’s off-road durability test, before I order the MSP. It’d be great to see Chris and Tishawn’s NYC maneuvering tests too, but I don’t know if they’re still videoing their rides much these days.
  10. @Young il KIM Thank-you for creating the IRON-100. It fills the market niche for a sport-specific wheel. No need to worry about trolley handles, speakers, rainbow light shows - just the essentials. It's incredible that something that weighs only 42 lbs can get you moving 68 km/h! I'm looking forward to the reviews. Perhaps you can get @Kuji Rolls to test drive it? Also looking forward to seeing the improvements in quality and reliability over the Rockwheel GT-16.
  11. Asphalt

    MSuper Pro?

    I asked Gotway about those pseudo-vents. Their reply was somewhat cryptic, probably due to translation issues: "External circulation system"
  12. Asphalt

    MSuper Pro?

    We won’t know for sure until someone can test a production unit, but there are some clues that would suggest Gotway is trying to build a more performant wheel. 1. The wider custom motor probably indicates that they’re using wider magnets and more wiring. 2. The higher 2500W motor rating suggests that the motor is capable of drawing more current than the previous 2000W motor. 3. The larger capacitors suggests that the control board is capable of handling larger current spikes. 4. As mrelwood said, the 7.3A LG 21700 batteries can momentarily produce more current than the old 18600. Assuming that the mosfets and other control board components have been upgraded as well, the MSuper Pro should perform better than the MSX. My concerns would be Gotway production QA (Gluegate) and heat. Putting powerful fans in an enclosed case just pushes hot air around. They need some effective way to transfer heat out of the wheel, whether it be by flowing air through the shell or liquid cooling. It’s not like they’re worried about shell integrity - punching holes in the shell to accommodate speakers.
  13. Asphalt

    MSuper Pro?

    Here’s what Gotway says has been improved: Msuper Pro details: 1. T6 24v double headlamp, fan cooling! 2. Bass loudspeaker! 3. Better motor column! 4. 24V powerful fan, external circulation! 5. Thickened customized motor! 6. Waterproof rubber strip! 7.Color interface, color differentiation ! Looks like they’ve implemented a lot of user feedback!
  14. Asphalt

    MSuper Pro?

    Some more images from Gotway. Looks like a thicker shell, wider motor and fan for the dual light. The electronic stuff I defer to people more knowledgeable to interpret.
  15. The KS-16X is a fantastic wheel. The extra range alone is worth it. The only thing I'd recommend that you do is seal the power button and gap under the mud flap, so that Wet Coast weather doesn't find its way into the wheel.
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