Difference Between PW Series ST And PW Series SE Both Showing 70NM Power
Right, you've shifted from the part codes to the actual consumer names - and that I can help with more usefully.
Here's the honest state of play: I can confirm the
PW-X2 is 80Nm from my verified data. The PW-ST and PW-SE I genuinely can't put a confirmed torque figure against from what's in front of me, so I'm not going to throw a number at you and hope - you've had enough guesswork from manufacturers' marketing departments for one lifetime.
What I'd say on the broad point though: matching torque figures don't mean two motors are the same unit or behave the same way. Two 70Nm motors can feel completely different - cadence support, how the assist tapers off, drag when you're over the limit, noise, thermal behaviour on a long climb. The Nm number is just the headline; the character is where they actually differ. So even if PW-ST and PW-SE were both quoted at 70Nm, that wouldn't tell you they're interchangeable or that one's a tune of the other.
For your actual situation - you've been looking at fitting a PW-X2 or PW-S2 into the AllTrail's bracket - the thing that matters isn't the torque comparison, it's whether the
mounting interface, motor mount geometry and the wiring/connector ecosystem line up. That's the real fence on a swap, and it's where I'd focus.
The fastest authoritative answer on what PW-ST vs PW-SE actually are: the consumer name on the motor housing label, then a Yamaha eBike service centre or dealer parts lookup. They'll have the spec sheet that I can't confirm from here.
What's printed on the casing of the bike you're comparing against? If you tell me that, I can be more concrete on the compatibility side.