650/75R32 tyre

[ploughman1963]

Our combine came on 650/75R32 tyres but different brands - One has a flat tread profile while the other is crowned which means they have a different rolling radius and causes the combine to be slightly higher one side than the other - no problem until you put our 18’ header on that doesn’t have levelling and one side of the header is 4” lower than the other and causing premature wear on the skid plates.
One is an ‘Agri-ork’ from Ukraine and the other is an ‘Ozka’ from USSR?
Has anyone got a match for either tyre or a reasonably priced pair of tyres?
Many thanks
Colin