This is a model for the disk piece that holds the magnets in a PAS (Pedal Assist Sensor) for ebikes; this particular piece is 79mm in diammeter, the holes in which magnets sit are 5mm, and are far from edge by 6mm, the inner hole at the edge of those spokes is 14.5mm and at the orgin of the spokes is 22.5mm; this is according to my measurments on my old disk and this is for a VeloBecane ebike.

If you have different measurment, feel free to contact me and I can change those for you.

I used ABS to print this piece and tested on my ebike, it's working great.