So I had a 2014 Leon ST 1.4TSI on 17" wheels (not FR) and moved to a Cupra ST on 19" wheels and was also surprised.
I've since added DIY soundproofing to rear bench, boot and doors which slightly shifted the sound balance but not massively.
I then switched to 18" and PS4s which did soften the ride a tad and reduce the noise a little but not as much as I'd hoped.
I'm still amazed at the sound difference given it's only a little stiffer and bigger wheels.
So by all means try different tyres, they do make a difference. but don't expect miracles.
I now wonder if it's the aero floor picking up road noise or something.
I've since added DIY soundproofing to rear bench, boot and doors which slightly shifted the sound balance but not massively.
I then switched to 18" and PS4s which did soften the ride a tad and reduce the noise a little but not as much as I'd hoped.
I'm still amazed at the sound difference given it's only a little stiffer and bigger wheels.
So by all means try different tyres, they do make a difference. but don't expect miracles.
I now wonder if it's the aero floor picking up road noise or something.