Try wheel change
One thing I don't see specifically addressed is wheel straightness.
It's fairly easy to bend one of these rims, and you may have had the front wheels balanced but I'll bet they weren't turning very fast while they did it.
If it was OK before the replacement tyres, and isn't now, it may just be that one of the wheels is slightly bent, was on the rear, and you have put it on the front.
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Gordon, in Scotland
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