I did not find the right information in the Superdelite specifications but I could notice the wheels are based on 32 spoke Novatec hubs. What really matters in a heavy powerful e-bike are the rims, spokes and hubs. I am pretty sure R&M chose very strong wheels for their design, as the torque at the rear hub and the weight on both hubs are the most limiting factors. Of course the frame must be thicker and heavier, too.
The full suspension is heavy. Dual batteries are heavy.
The factors affecting the R&M price (I'm talking Superdelite Mountain as the example) are:
- Dual battery - the most expensive
- Front and rear suspension
- Suspension rear rack
- Dropper post
- IGH, especially Rohloff, and belt drive
Nothing of the above is cheap.
@Neville Welsh: Does the Superdelite have thru-axles equipped with quick release handles or is it the old-school QR?