I need rowcrop wheels for my Fendt 716 s4 with current tyres 650 65 r38 rear/540 65 r28 front . I found some 380 90 r50 rear /340 85 r36 front and not sure if they are same ratio as normal tyres i have . I mention that i want to sit as tall as possible .Apreciate it ! English not my native ,sorry for mistakes!