I designed this spacer because the default sensor rubber is not close enough to the magnet, and when I say not close enough, I'm saying very very far away, which is curious because both of the bikes that I tried are from Decathlon, I don't know if the brand is aware of this, but they should find a solution.
The brand says that the sensor needs a minimum distance of 5 mm to be detected, I would recommend a little bit more because if the magnet turns around it could collide with the sensor.
As it's seen in the pictures, by default the sensor is more or less 17 mm away from the magnet, with my spacer the sensor is just 7 mm away, enough to detect the speed, but you can put it closer rising up or down the sensor.
You will need two more straps to attach the spacer to the bike.
The spacer is designed to work with a fork of 40 mm diameter, but you can adjust it with de SOLIDWORKS file.
Supports:
No supports needed, print it standing up.
Resolution:
0.2 layer height
0.4 nozzle
Infill:
15%
Perimeters:
3 or 4 recommended
Filament: PLA
The author marked this model as their own original creation.