Well if you wanna risk it, that's okay.
But if it gets classed as a "modification" and you end up
with invalidated insurance do you really think the "nice"
insurance company is going to look the otherway?
As ever, everyone is a car insurance expert apart from the people who are paid to work in the industry
There is a myth out there that if you change the specification of your vehicle and don't tell an insurer that your policy is automotically invalidated - this is NOT TRUE.
As ever, it depends on the nature of the changes made to the vehicle but does not apply to everything. Should you tell insurer if you change a cupholder or put some fluffy dice in? Of course not.
To say that insurers check tyres and specifications when inspecting vehicles is not entirely accurate, unless a specific blow out or tyre related problem was a direct cause of the incident, which in the instance of what was discussed on this thread would be nigh on impossible to determine.
Of course, checking tyres that are clearly worn out is something entirely different and any garage worth its salt would check and advise about something like that.
Of course, I would always recommend that people fit the correct size and spec of tyre to their cars, but if someone fits a slightly different size or spec to instantly assume that an insurance policy would autiomatically be invalid is totally inaccurate, regardless of how 'nice; the insurance company was.
I also cannot see why someone fitting a slightly different brand of tyre to their car could be classed as a modification. Once again, there seems to be confusion and misinterpretation going on here