Not trying to poke the bear, but I don’t know if this is really an advancement or not…
Direct drives have their own issues, no system is perfect at this point.
Carvon can talk about full urethane ect. ect. but the reality is that we have only 6mm less urethane then a standard abec wheel. It’s more a marketing point than anything. So you don’t like our 83mm wheel feel? Put on a 90mm wheel with hummie hubs and you’ll get more urethane then the abec 83mm wheel. Most hubs however can’t do this, because they expand in diameter. With hummies hubs, we’ve expanded in length instead. This allows us to keep the can small diameter wise for more rubber, while creating one of, if not, the most powerful hub motor ever created.
Good luck even running your carvons with 83m wheels. You will get thrown off from even small rocks getting caught between the can and the street. 90mm is better, but it is it’s biggest vulnerability.
In terms of direct drive though, carvon has done somethings right, but they still use off the shelf motors, strip them, and adapt them to a truck. As a result, they can’t do custom kvs, and most importantly, they are stuck with thin strand wire. This means for the same motor size, they will get less torque because they will have less copper, since insulation on that thin wire is more than half of the wire. Even comparing a 18 to a 24, the 18 has double the copper of the 24, but is rated to 4 times the amps. We’ve seen this play out with testing to result in a far more powerful motor that can handle far more current. That’ll mean you can pump in more amps without fear of blowing the motor.
Not trying to talk shit, cause like I said, no one has a perfect solution. Good wheels with good cores are still a struggle for pretty much every hub motor. I just think saying hubs where a stepping stone to the direct drives is not true. Especially when you consider carvon was doing direct drives back when hub motors where not really a thing. I wouldn’t say either was a stepping stone to the other.