Hello, I had the Goodyear Vector 4Seasons Gen1 (16 inch) on top of my Golf BJ 2015 as standard equipment. After about 40,000km of mileage and because the Vectors were a bit “greasy” in the summer, I got 17″ summer tyres this summer and wanted to use the Goodyears seasonally as winter tyres. (as winter tires do their purpose very well). If I now change the tires again towards winter, the question arises to me whether it is still worth it (or even if it is not possible) After the approximately 40,000km on my golf, the front tyres still have about 5.5mm and the rear ones about 7.5mm – so both are still related to the recommended profile depth in the green area, but already very different. The front tyres already have the probably normal many small cracks on the tread, the rear ones almost not at all. I had either before: 1) the tyres now again axle-wise) to replace the GJR times axle-wise, as some recommend? e to exchange compared to before (?) 2) to get me possibly 2 new GJR (then probably the Vector Gen2) from Goodyear and to remove the already somewhat worn 5.5mm tires, but to drive the rear 7.5mm even further. Are here recommendations regarding the condition of the tires and whether one should make an exchange from front to back still? Thank you and greeting