I took the 'racing line' straight over a roundabout when it snowed, and clipped my front wheel on the kerb. I suspect this has upset the wheel bearing.
Ever since, I get a faint but deep vibration that pulses about once a second, it starts at 70, is strongest at 75, then slowly tales off. If you really concentrate, you can feel it through the wheel and pedals.
VW and a indie have seen it and both say 'no faults found'. I'm getting it done in the next couple of weeks, I'll let you know if it fixes it, lol.