I always like what these guys are offering, but somehow the prices always seem to go through the roof, this motor even more so. When I spec one out all of a sudden they need four figures from me, though usually I've ended up speccing something top notch. I'd love one of these with a torque sensing controller but I can't see it happening.
Indeed their in-house options aren't cheap but then again, the difference in quality is significant. This direct-drive hub motor for example weighs full 2kg less than the equivalent imports. That's all down to engineering, materials used and accuracy of manufacturing. The other options like are significantly cheaper. I'm running a geared Bafang myself due to its lower weight (2.6kg vs 4.2kg). The lower weight is due to the type of motor - geared vs direct-drive. The lapses in quality are obvious. For example water resistance is not great at all. If Grin make an equivalent small and light geared hub, I'd probably buy it as it'll most likely address Bafang's deficiencies and it might be lighter too.
I've never ridden an ebike. Care to explain the difference in practical terms? I imagine cadence and torque are roughly correlated, but with cadence sensors you'd have to pay more attention to your hearing?
I've really no idea, like I said I have zero experience with ebikes.