Do the tyres have "rim protectors", only on the side labelled 'outside'?
https://cdn.tiresleader.com/static/img/guide-pneu-rebord.jpg
(rubber sticks out further than the rim, so you can brush a kerb when parking and not ruin your wheel)
BBC news went at the same time. Severe lightening at wherever they transmit the signal up to space? (i.e. if the weather is fine where you are, so it's not you receiving signal that is the problem).
The cheap ones are not "core alignment", they are only 'cladding alignment', which increases losses.
Also, some professionals require an image to be saved of every splice they do, the cheap ones don't save anything.
It's usually about 70% of the nominal size. You can measure it with calipers to find the "root" diameter.
So for a 6mm screw you want a 4.2mm pilot, but 4mm will be close enough. And a 3.5mm pilot for a 5mm screw.
Don't try and drill it all in one go, the drill's flutes will clog and you can...