Search āmeroca mx2 colorfulā
Hereās my smart light deep dive:
I needed the ones with the strap on the back so had to pick emm up off ebay:
The superbeast has steel (stainless steel, unknown alloy) motor gear, plastic (POM) idler gear, plastic (POM) wheel gear.
Sweet!
Reply to āPictures and nothing elseā thread_2020_summer:
Whatās the point of the idler gear? Seems like just another point of failure
Troll attempt: 0 points
For motor clearance to mount your motors at more angles, forward or reverse mount.
I was thinking this too, but I am no mechanical engineer. What is the advantage to having that idler gear?
For urethane it seems to make some sense as you can reduce the size of the spur gear to get more clearance?
Yeah this is what I thought too, you either have to have the motors like how the BN M1 has it, or have really bad clearance
Also keep in mind there is only like one setup on street wheels where you can have the M1 facing the rear
Continuing the discussion from Pictures and Nothing Else!:
@frame My best guess is that its a switch that disconnects the charge port from the outside world.
When a charger is present, it opens up the highway towards the BMS. This would be a minimum requirement feature in a commercial product if you ask me 
This could present a problem, as some chargers look for a battery voltage before they will turn on the juice.
Yeah, its a valid concern.
We use an isolated pilot signal for our chargers to turn on at work. But thats in the double digit kW range
MADRID
Dc Contactor/pilot relay w/ precharge circuit?
I got something similar coming up. 
Sheās a beast but thereās too much extra space in the enclosure. Battery is definitely her bottleneck.
Charger has small static pre-charge, contactor(PMU) is on battery/BMS side.
Contactor clicks->pilot signal (basically just an I/O) to charger from BMS->charger ramps up voltage.