I don't want to clutter my questions to Bugsy above, as my post was already long.
Some more questions I thought of:
Does Truckrun use Bafang-standard cables? (Is there anything proprietary with cabling, other than pinouts?)
Do Bafang cables (such as extension cords) work on Truckrun motors?
Such as, if I raised my handlebars a lot, and ran out of cabling for the display, could I use a Bafang display extension cable on the M09? I know that Truckrun pinouts are different, but using an extension cable, the pinouts should go to the same place.
What Bafang accessories work on Truckrun? Displays?
I already understand that Bafang-compatible throttles are plug-and-play.
Where do the e-brake cutoff cables connect in a Truckrun (or Bafang for that matter)?
(To the display, or to the motor directly?) In other words, to raise the display, if you run out of cable while raising the handlebars , do you just have to extend the display, or do the e-brake wires need to be individually extended too?
Sharing some things I've learned in my own research on the
M09...
Anything below could be wrong--corrections welcomed.
- The maximum 'speed limit' (set from in the display Settings menu) is 60 km/h (37 mph). Throttle and PAS give out at that speed. Source: Firon Woo/4Leaf (but that could be a 4Leaf thing?). (Source:
youtube.com/watch?v=Q3484fYmRIA)
- It may be possible that manufacturers program the M09 to have different 'speed limits' for throttle and PAS. I
think I saw one where throttle cut at 52 km/h (32 mph), but the PAS at 60 km/h. I'd want it as unrestricted as possible.
- The M09 will (or can) accept a nominal battery voltage of 60V! (source: truckrun-e.com .) If the firmware is vendor-programmed to expect 48V or 52V nominal, it's not clear to me how a 60V battery (16s) would react. Would it refuse to run (but not sustain damage), would the display 'act weird' but the bike would still 'work' (like some 48V M620 systems behave on 52V), or just 'work normally'? (Either of the last two would be fantastic.) For that matter, if the bike was sold with a 48V battery, how would it react with a 52V battery?
- There are 3 power ratings for this motor, I suppose firmware-limited(?): 750, 1000, and 1200 watts. (I don't see a point of getting the 750W unless you could unlock it.) Since these are apparently 'continuous' values, I wanted to know what the 'peak' value was. That was more difficult to find, and conflicting. Weldinpat--in this thread, post #16, said:
M09 is claimed to max out at 245Nm, 1200-1600W.
Weldinpat, would you mind sharing the source for this, if you remember?
For the 1200W, I saw very conflicting values of 1200W, 1500W, and 2000W.
Assuming 40A is the built-in controller's amp limit, 40A x 48V would yield 2000W.. so 2000W could make sense. It could probably handle more, briefly. The Archon X1 third-party controller for the G510 would max out at 3000W, and Andy Kirby from Cloudsto.co experimentally pushed his to 4000W using a Phaserunner (
source). And my impression is the M09 probably has better heat management than the G510.
- The M09 appears to have a dedicated gearshift sensor port built into the motor.
- Discussion of the M09's massive torque claim of 220Nm (not important, just 'thinking out loud', if anyone wants to listen). I'm not sure how meaningful torque ratings are, and if (with the M09's 220Nm) that can be considered a direct comparison to Bafang Ultra's 160NM at 'gut-level impression' of performance, though user feedback here seems to imply possibly yes. That said, I'm starting to conclude that torque
ratings alone are not more important than watts. There is a lot of collective knowledge on how to feed the Bafang Ultra watts beyond its rating.. not so with the M09, so it really has to be good 'as it is', to compete (one reason I was asking the real 'peak wattage'). I now think it's more about 'gearing and watts'. For instance, Truckrun's "3000-6000W" (Sur-Ron-like?) mid-drive motor is rated at "30-60Nm" (not a typo), and "5000-7500 RPM". I've seen differing wattage-rated motors by the same manufacturer, rated with the same torque rating. Maybe one's geared slower. Maybe they're both the same peak watts. Maybe they lie. I don't know. If you can't loosen a nut using a short wrench, you can add an extension to the wrench, and loosen the nut with the same amount of force--that leverage is torque, to my understanding. You could run a car (slowly) with a power drill, if you had the gearing and enough time--it would just go a lot slower. In physics class, I think the teacher referred to watts as "work" or "work done" (not counting friction/heat). What really matters is torque delivered to the wheel or the ground, and my understanding is that's not how manufacturers usually rate their motors (Pinion is an exception). That said, I know proper gearing with the same total energy (watts) makes a big difference climbing hills (think mid-drive vs hub motor, when you can trade speed for higher torque by gearing down). So, I think both specifications matter, and torque consideration might need to include speed, in context of watts. All TTBOM.