Originally Posted by Roman D

well, I guess you know better. There is always a possibility that it was simply time for that differential to become broken
But I am having hard time accepting that 275/40 has the same diameter as 315/35.
The length of the circle is 2PiR
Where We have 275x40, 40mm (4 centimeters) height of the tire which we will add to the diameter of a rim on both sides.... 4+50.8(diameter of the rim)+4= 58.8, where radius would be precisely half, 2 x 3.14 x 29.4 = 184.73
Where we have 315x35... (3.5 centimeters)
3.5+50.8+3.5=181.58

According to that wheel with tire that has a wall height of 40mm will have 184.73cm outer length and the one with 35mm wall height will have 181.58 cm outer length which is not the same.
Am I overthinking the situation?