REVIEW Hello folk! As promise I would like to share my thought about these hubs, that from now on I called MAD hubs, because it is what I thought when I ride them for the first time and to make it easier recalled them. Plus a comparison with the known ones from DIYEboard (Meepo style) http://www.diyeboard.com/dual-hub-motor-9052mm-1000w75kv-power-truck-front-truck-kit-p-558.html. The MAD hubs come in two version 75Kv and 130Kv, rated at 1800w peak current and 500w continuous. You may notice that they look like the one Torque Board was selling and indeed they have the same specs too, but I want to specify that they do not come from them. That’s also the reason why I wanted to first test them before close the GB. For the test I got the 130Kv ones, mainly because my plan was to find new hub motors to replace the DIYEboard ones, which are great, but I got used of the top speed and I wanted something more! As board I used a spud build (https://www.electric-skateboard.builders/t/first-build-the-avenger-jet-spud-dual-hubs-motors-custom-10s3p-30q-maytech-vescs/52437?page=3) having a 10s3p Samsung 30Q battery and 2 Maytech’s VESCs. I first wanted to describe the 130Kv hub motors itself. They came assembled, without the truck. On the website they advice to use Paris style trucks since you need rounded hanger ends, but if you are willing to modify other trucks, such as caliber, they will work too. For the test I bought Paris clone truck from Ali (I will post my thoughts about them later one). Here you can find some pics of the disassembled motor.
The motor size is comparable with a 6355 outrunner motor and overall looks good. I am not an expert in judging windings, but it seems legit. Looking at the motor itself I first didn’t like some design choices. The motor can is kept together with long screws that are attached only at the end. The motors mount on the truck with a collar that slides on the end of hanger and uses two screws to secure the motors in place. Last thing the PU used is a 90mm 90A which I thought would be too hard. For the installation I follow the tips given on the forum https://www.electric-skateboard.builders/t/tips-on-installing-torque-boards-dual-hub-motors/29586/6?u=rey8801, but I will also post later on a step by step “how to do it tutorial”, with pictures for better understanding. For the comparison I chose to post the telemetry data from both the two hubs (130Kv MAD hubs Vs 75Kv DIYEboard) recorded on the same trip. For better comparison I used the same board and settings for both, the only differences were the motors and that the MAD hubs run sensored.
Results from telemetry and review:
DIYEboard 75Kv (65Kv real)
MAD 130Kv (110Kv real) Hubs
Overall results 130Kv MAD hubs Vs 75Kv DIYEboard
Coasting capability. The MAD hubs surprised me for the free wheels experience. Don’t get me wrong also the other hubs roll well, but these ones do it better. Basically you can accelerate and then coast for longer than the other. Same thing if you push them as normal skateboard, I would say you feel 1/3 of the resistance compare the others. Really like this aspect.
Ride smoothness. One of the aspect that I judged as a problem at the begging was the 90A PU used. It actually turned out be way better than the other hubs with softer PU (I think 80A). Probably because the MAD hubs have 15mm PU thickness. Anyhow what matter is that I feel way less the bad roads. If I need to rate the difference I would say 3 times better compare to the other hubs (they are not famous for ride smoothness ). Of course full urethane will always be better in absorbing vibrations, but I can really live with that with these hubs.
Power output. Both from riding feelings and telemetry data the MAD hubs are more powerful than the others. They easy output 1800watt (total from 2 hubs) compare to 1200-1300 watt of the DIYEboard hubs on hard acceleration. Although I could reach up to 1600watt few times on hard acceleration up hills. Of course the two hubs have different Kv, so would have been better to use the same Kv for both the motors. Anyhow overall the DIYEboard wins over the MAD 130Kv hubs for the takeoff up to let’s say 10-15kmh (this DIYEboard 75Kv surprise everyone for the instant torque). So let say in a drag race, after the first 15 meters there is no chance anymore for the DIYEboard ones, really no game. Don’t get me wrong the MAD hubs pull too, it’s just that the motors are let say less efficient at really low rpm compare to 75Kv hubs. If you want instant torque, for an overall lower speed I am sure the MAD 75Kv version will be a blast. I would be really curious to try them out! Nevertheless I could climb all the hills in my city with no problem at all (more about hill climbing here https://www.electric-skateboard.builders/t/eu-usa-group-buy-90mm-dual-hub-motors-75kv-or-130kv-dual-170-euro-3-to-go/62002/113?u=rey8801).
Top speed. What to say…they fly, that’s it. Fun fact, to understand how much they can pull is that I never reach 95% of duty with these motors. Before I used to pull the throttle all the way up and you see from the telemetry the duty at 95% and then the motors amp, speed ecc increasing over time. With these motors I can reach at most 70-80% afterward my VESC setting limits the power. When you ride you do not feel it at all, but basically I easy reach all the battery and motor max limits. With that being said +50kmh easy, too easy maybe. Probably a bigger LiIon battery (10s4p or above, 12s…) or Lipo are better if you want release all the power. I think it’s already plenty though .
- VESC temperature. This is actually the only issue I have experienced with them compare to the DIYEboard hubs. I guess is due to the difference in power and current drain. Of course depends how you ride, but if I do it hard the VESC temperature rises fast on my Maytech’s VESC. This can be solved limiting the max motor and battery settings. Basically to reduce the peak currents, but still keep nice top speed.
A real heatsink , better VESC, or 12s will probably help too. Don’t get me wrong I use it every day, I don’t ride all the time at plus 50kmh . With 30Kmh average and some sprints not problem.
- Battery drain. Same story, they ask more, if you push hard they drain more. Not surprise by that. Again if you ride in a more enjoyable way, same range of the others.
Conclusions: I really like the MAD hubs and I am happy with them. I will definitely choose them over the DIYEboard ones. Which versions to choose? Good question, I guess if you plan to climb hills all the time the 75Kv is recommended. Unfortunately I couldn’t test it, but I guess they are the same motors, maybe even the only different between them is the delta and wye configuration, so you can always switch between them (130Kv / 1.73 = 75Kv). On the other hand if you want to have a freaking top speed and overall great power, than go for the 130Kv version, as I did. Of course, keep in mind the max ERPM limit of the 4.12 VESC. With a 130Kv you are at the limit with a 10s, out with a 12s. You can always limit the max ERPM in the VESC setting and moreover the only problem is during bench test, otherwise you need to go over 70kmh to encounter this problem! To make it short, don’t spin it fast on bench .