S3 hub incl. sensor: ~ 3 kg (maybe 2.9 or 3.1 kg)
Golf hub incl. sensor and bearing: ~ 8.2 kg
I guess wheel bearing will be around 2 kg, so iron hub should be ~ 6 kg,
but we'll see.
S3 arm - 2.9 kg
A3/Golf arm - 4.0 kg (welded)
A3/Golf arm - 4,7 kg (cast iron)
I'm gonna check the weight of my old cast iron hubs when the S3 hubs will
have been fitted.