One of my old e-bike has a broken component and is subjected to upgrade, as most of the vendors have either disappeared or declare the component as end-of-lifecycle.

I'm considering Grin PhaseRunner ESC:


and its successor, Grin BaseRunner V4/V5:


as the next ESC, it has good customisability & compatibility with many components. But there is one problem: According to its manual, it can only run with a PAS or torque sensor, or both.

Unfortunately the only standard Bottom bracket standard I could use are SRAM GXP or SRAM DUB, none of which has a compatible sensor interface.

So my only option is to use no sensor at all, and rely on throttle control. I may be able to upgrade to an optical flow based sensor later, which is agnostic to BB standard. Also, Both ESC can communicate with a cell phone with bluetooth, so a display appears to be redundant

So far, this feature has only been seen on Golden Motor xxx Pie series, and obviously, any motor integrated with a hub torque/PAS sensor. I haven't find this option in the manual, or any official build template. Is it possible?

1 Answer 1


I don't have the knowledge to directly answer your question about running with no pedal sensor.

I can say that when I set up my Grin system, I was able to buy a pedal cadence sensor from them that consisted of a two-part ring of magnets that attached to my inner chainring and a sensor like a bike speedometer that got taped to the bottom bracket shell, and ran that together with a throttle.

(It worked well, but I eventually upgraded to one of their torque-sensing bottom brackets.)

  • yeah that's the tricky part: there are 2 PAS sensors: for squared tapered BB and shimano hollowtech BB, there are 1 torque sensor: for squared tapered BB, so oops :-<
    – tribbloid
    Commented Aug 29, 2022 at 5:56
  • @tribbloid: This is the one I’m thinking of. ebikes.ca/shop/electric-bicycle-parts/torque-sensors/…
    – RLH
    Commented Aug 29, 2022 at 14:23
  • I see your point. Unfortunately, "For 74mm 5 Bbolt and 64mm 4 Bolt Cranksets". The most common one is BCD130mm, for fixie it is BCD144mm. In the meantime optical flow sensor has absolute no dependency
    – tribbloid
    Commented Aug 29, 2022 at 18:35

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