Advise wanted! Strange tyre/wheel behaviour
my brother bought his first car, a brand-new VW Polo.
The standard tyre was 185/60 r 14 and he changed them immediately to 185/55 r 15 Pirelli P7 with 7x15 BBS wheels. But, even the alignment and the balances are ok, the car starts going to right lane when he takes off his hands from the wheel. The garage replaced with brand-new original tyres/wheels for test and it was gone. They changed the BBS's from right to left and the car starts going to left now.
Any idea? I haven't seen such thing before.
Balance and alignment is OK.