Dominique B. Posted November 12, 2015 Posted November 12, 2015 Hi guys, I have been testing my Gotway MCM4 for 2 weeks now and power is good but when reaching 50% batt capacity high current drains generate beeps when accelerating. I have 680mah version and my weight is 85kg. I could not go faster than the 25 km/h shown on the app which correspond to 22km/h gps speed verified on a 1km ride down slope. Tilt back works but too early ! I reported the lack of speed to Gotway staff and they keep repeating that the temperature the user weight and ground texture is the reason even when I tell them that I did not manage to exceed 22km/h in a down slope with battery fully charged... Weight is not an issue on a down slope... I asked about removing alarm and tilt back and they say it is not recommended therefore the real speed of MCM4 is 22 km/h and not 33km/h as anounced. I managed to drive about 35 km including up hills (about 12km) and same amount of down hills included in the 35km than I got 1 green light left and two red ones and dropping to red when I was using the power, and 30% left on the app. I decided to charge it as it was beeping when I was accelerating. I inflated the tire at max and bad surprise the tire got blocked within the box... This is a major issue as it means that they haven't built the wheel considering the tire size fully inflated I end up having to inflate the tire every week which is not ideal. Another issue is a vibration coming from the bearing I can feel it in the pedals when I go fast but only slightly, no solution was proposed by Gotway staff but they keep asking for a film of the problem ?????? If someone is able to film a vibration that does not generate noise please let me know how you do it ???? I don't really know if it was a good choice in the end, when I was looking for a wheel I was interested in the King Song but was told they are not reliable and now I have a defect Gotway... That doesn't reach the 33km/h anounced !!!! For your info I tried a mcm2 last weekend and felt it more stable and smooth than my mcm4 ! Msuper is good comfortable but too big too heavy and ugly. I recommend the use of the trolley with wheels over 12kg in town. I must say I am disappointed as I would have bought a Msuper instead for the speed as the weight difference is only 1.6 kg between the two wheels (msuper and mcm4) The lack of after sale service is also something to be considered as no proposal is coming after 20 emails to solve the issues (speed and bearing vibration)
Linnea Veteran Posted November 12, 2015 Posted November 12, 2015 Haha, I have seen a point that I totally agree with. MCM2S is more stable than MCM4. Maybe GotWay factory need to speed more time to develop the MCM4. What I think it is good for MCM4 is that the App can cancel the beep and the tilt back, somebody like it. And it can adjust the tilt back speed. This is good. But MCM2s with 500W motor, MCM4 is with 800W motor, it will good for the heavier rider and to climb the hills. There I should note is that the max speed for MCM4 is 33km/h, but it is the ideally status, require light rider, flat road and full battery capacity. If the battery is in low capacity status, it is more easier to shut off at high speed riding.
edwin_rm Posted November 12, 2015 Posted November 12, 2015 There is not a lot of clearance between the MCM4 case and the tire when at max pressure indeed, but it doesn't seem to affect perfomance. The tire can scrape the case when fully inflated while it still has all that 'brand new tire' thread. Shall become better with wear (or a softer replacement tire). You mention King Song, but those also have their problems (overheating, frequent low voltage beeping, and bluetooth issues). All manufactures have lacking quality control, except Solowheel. Those are perfectly built, solid. Too bad their batteries are small.
Dominique B. Posted November 19, 2015 Author Posted November 19, 2015 Yesterday I managed to climb a very sharp uphill that is very difficult to climb with a mountain bike so I confirm the power is there I am 85 kg.
edwin_rm Posted November 19, 2015 Posted November 19, 2015 I can go to the advertised 33 km/h. There is a tiltback that starts slightly lifting back from 28 km/h with full lift at 33. Try disabling the 24km/h one. Also, I get the 60km range. I do also get lots of regenerative power from frequent braking. Try turning off and giving the machine a 3 minute cooling break every now and then so it can self regulate voltage.
edwin_rm Posted November 21, 2015 Posted November 21, 2015 Disregard what I said about the forced tiltback. Its not forced. I just faceplanted at 34 km/h (GW app speed, so 30km/h?). I was wearing no protection of any sort, however, due to the weather being cold, I am wearing multiple layers, which minimized the impact. I did rip and tear my pants and my expensive jacket really bad! (to the trash theyll go after today) The euc algo got really scratched up, but still works fine.
Jurgen Posted November 21, 2015 Posted November 21, 2015 Good to hear only the clothes got damaged, your wallet is the easiest part to heal. I've had a few nasty falls myself in the beginning. I know how to handle myself but still I was very happy wearing full protection. 30KmH without any protection, is really not a good idea. Minimum is a helmet covering also the back of your head, and wrist protection (weakest joint) if you don't know how to roll. If it's not for yourself, do it for other riders, because once EUCs start suffering a neg perception it will be for everybody. I don't want high insurance fees, imposed full protection all the time, and imposed speed limits from my local regulators, any more than the next man. Any idea what caused the FP? Safe riding.
edwin_rm Posted November 21, 2015 Posted November 21, 2015 33 minutes ago, Jurgen said: Any idea what caused the FP? The engine shut down. Its not sudden thou. The euc gives a "floaty" feeling right before shutdown, so you know its coming. I know to never to put hands in front of me (I also snowboard), so I used my forearms instead so as to prevent the face hitting pavement when I fell. What hits the floor the hardest is always the chest. Only damage I got on my body was road rash on the body parts where the clothes ripped. The impact tore thru all layers into the skin. But I'm back on my feet and still riding. Posting this from a juice bar having a smothie, then more riding! :-D
Jurgen Posted November 21, 2015 Posted November 21, 2015 1 minute ago, edwin_rm said: The engine shut down. Its not sudden thou. The euc gives a "floaty" feeling right before shutdown, so you know its coming. I know to never to put hands in front of me (I also snowboard), so I used my forearms instead so as to prevent the face hitting pavement when I fell. What hits the floor the hardest is always the chest. Only damage I got on my body was road rash on the body parts where the clothes ripped. The impact tore thru all layers into the skin. But I'm back on my feet and still riding. Posting this from a juice bar having a smothie, then more riding! :-D that's the spirit, may the Big Rider be with you
LorenW Posted November 22, 2015 Posted November 22, 2015 Hi Edwin -- What do you think caused the shutdown? Overheating or was it some other issue? I too am glad to hear you avoided serious injury. :-(
edwin_rm Posted November 22, 2015 Posted November 22, 2015 49 minutes ago, LorenW said: Hi Edwin -- What do you think caused the shutdown? Overheating or was it some other issue? I too am glad to hear you avoided serious injury. :-( I exceeded the MCM4's max speed. The machine automatically shuts down the engine to "protect the battery". Apparently, riders are expendable. Gotta admit... whoever designed the battery protection system is a douchebag! LoL
Jason McNeil Posted November 22, 2015 Posted November 22, 2015 On 11/12/2015, 1:27:09, Dominique B. said: I don't really know if it was a good choice in the end, when I was looking for a wheel I was interested in the King Song but was told they are not reliable and now I have a defect Gotway... That doesn't reach the 33km/h anounced !!!! For your info I tried a mcm2 last weekend and felt it more stable and smooth than my mcm4 ! I must say I am disappointed as I would have bought a Msuper instead for the speed as the weight difference is only 1.6 kg between the two wheels (msuper and mcm4) Your report of the disappointment in the MCM4 was also the conclusion reached by @John Eucist, the forum's founder & who now owns just two of the King Song 14" eWheels. Who said the King Song is not reliable? I've sold over 50x of the 800W 680Wh units & haven't heard of any reports of reliability problems. There was a time when I considered offering the Gotway brand, but their lack of tilt-back safety & much lower threshold of cut-outs presented too much of a risk.
Viktiga Posted November 22, 2015 Posted November 22, 2015 2 hours ago, edwin_rm said: Whoever designed the battery protection system is a douchebag! LoL That is ridiculous. I rather have a lower top speed then 1 unexpected shut down. The design should always be tilt-back no matter what, imo.
johnc415 Posted November 22, 2015 Posted November 22, 2015 On 11/21/2015, 2:45:17, edwin_rm said: The engine shut down. Its not sudden thou. The euc gives a "floaty" feeling right before shutdown, so you know its coming. I know to never to put hands in front of me (I also snowboard), so I used my forearms instead so as to prevent the face hitting pavement when I fell. What hits the floor the hardest is always the chest. Only damage I got on my body was road rash on the body parts where the clothes ripped. The impact tore thru all layers into the skin. But I'm back on my feet and still riding. Posting this from a juice bar having a smothie, then more riding! :-D Glad to hear it wasn't more serious - that's a scary situation to be in, fp'ing at 30kmh! Please use protection when traveling that fast! I think you're the first confirmed MCM4 fp. For now, I will continue to hold off on stocking these...
John Eucist Posted November 23, 2015 Posted November 23, 2015 On 11/22/2015, 3:45:17, edwin_rm said: I know to never to put hands in front of me (I also snowboard), so I used my forearms instead so as to prevent the face hitting pavement when I fell. Not sure what you mean. If your forearms are in front, so are your hands? I always keep my hands in front when I feel my speed is getting risky so that I can break my fall with my hands and arms. Did you mean to prevent wrist from snapping?
SlowMo Posted November 23, 2015 Posted November 23, 2015 10 hours ago, edwin_rm said: I exceeded the MCM4's max speed. The machine automatically shuts down the engine to "protect the battery". Apparently, riders are expendable. Gotta admit... whoever designed the battery protection system is a douchebag! LoL It seems that the machine shut down due to the motor not being able to cope with that speed and not due to bms protection. It was confirmed by the lifting test done admin @John Eucist wherein the MCM4 shuts down at under 30km/h and the KS 14-800w shuts down just above 40km/h. I wonder why Gotway still hasn't perfected the implementation of the tilt-back feature. The MCM4 specs never mentioned about any tilt-back feature as depicted below:
edwin_rm Posted November 23, 2015 Posted November 23, 2015 6 hours ago, John Eucist said: Not sure what you mean. If your forearms are in front, so are your hands? I always keep my hands in front when I feel my speed is getting risky so that I can break my fall with my hands and arms. Did you mean to prevent wrist from snapping? Yeah, thats what I meant. I use my forearms rather than my hands so as to protect my wrists during a fall. Thou the falls are smoother when snoboarding due to the surface not being hard concrete.
Swissfonda Posted December 5, 2015 Posted December 5, 2015 I also received my Gotway mcm4 after 1 and a half months and I'm sligthly dissapointed about the safety.The motor just shutoff when I was pushing it to the limit between the 3rd alarm and 2nd alarm. Luckily I wore a Jacket and only got some bruises on my knees. If I have known about that issue, I would get a Kingsong for sure. For now the Gotway mcm4 is a no go.
playdad Posted December 6, 2015 Posted December 6, 2015 16 hours ago, Swissfonda said: I also received my Gotway mcm4 after 1 and a half months and I'm sligthly dissapointed about the safety.The motor just shutoff when I was pushing it to the limit between the 3rd alarm and 2nd alarm. Luckily I wore a Jacket and only got some bruises on my knees. If I have known about that issue, I would get a Kingsong for sure. For now the Gotway mcm4 is a no go. Ouch, that doesn't sound good when you're not even exceeding the 3rd alarm constantly?
h00ktern Posted December 6, 2015 Posted December 6, 2015 But what level of charge was the eu at? If low, then I could see "pushing it" causing a problem. When I'm down to 3/4 charge, I'm aware of what I'm doing. At 1/2 charge, I'm trying to be very aware of what I'm doing, and don't "push it" at max speed. 1/4 charge - rider beware - baby it.
playdad Posted December 7, 2015 Posted December 7, 2015 Are they pushing out frequent firmware updates? I hard about speed limit issues and was wondering. I was planning to buy a MCM4 but am now still wondering if it's a good investment!
SlowMo Posted December 7, 2015 Posted December 7, 2015 1 hour ago, playdad said: Are they pushing out frequent firmware updates? I hard about speed limit issues and was wondering. I was planning to buy a MCM4 but am now still wondering if it's a good investment! No they won't after hearing all the issues related to Ninebot updates. If you choose to buy around 2016 December, you would be quite assured of product improvements. For the rest of us, we just take the time to enjoy. Or else, buy 2 or 3 different models, if one breaks down then you have 2 more to enjoy.
playdad Posted December 7, 2015 Posted December 7, 2015 Haha, not all of us can afford to allocate funds to more than one EUC. I already have a few toys (and more upcoming toys!), 2 kids AND live in a country with high cost of living. So it's more like one purchase per category!
Swissfonda Posted December 8, 2015 Posted December 8, 2015 On 6.12.2015, 22:08:46, h00ktern said: But what level of charge was the eu at? If low, then I could see "pushing it" causing a problem. When I'm down to 3/4 charge, I'm aware of what I'm doing. At 1/2 charge, I'm trying to be very aware of what I'm doing, and don't "push it" at max speed. 1/4 charge - rider beware - baby it. Yeah I remebered that It was between 50 and 60 percent of the battery when the motor turned off. The next Day I tried to push it again with a 100% charge and found out that I can push it way more than before. I also reached realtime 27-28 km/h for 30 seconds on a straight way without the engine turning off. On 6.12.2015, 16:47:45, playdad said: Ouch, that doesn't sound good when you're not even exceeding the 3rd alarm constantly? I exeeded the 3rd alarm only once right before I the motor turned off.
playdad Posted December 8, 2015 Posted December 8, 2015 1 hour ago, Swissfonda said: Yeah I remebered that It was between 50 and 60 percent of the battery when the motor turned off. The next Day I tried to push it again with a 100% charge and found out that I can push it way more than before. I also reached realtime 27-28 km/h for 30 seconds on a straight way without the engine turning off. So it seems like a charge issue? But you have a 680wh battery! 50% charge should still be plenty sufficient in theory, no? Does Gotway have official forums where communication can be seen? I'd like to see if they have an active community where they are talking about fixes. I was considering buying a MCM4 but am concerned by these.
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