volkerforster
Member
LOL. You assume "by default" that a newbie to the forum did not do any research before and first thing asks a question that has been answered already. And yes, I am the guy who gets mad, because I did my research. If you believe I am an idiot, I leave it up to you. But as you said so wisely: you don't know me. Then, please, don't judge me unjustifiably.
As I found out in the meantime, the grinding noise is caused by the differential due to tires with unequal circumference (regardless of having the same dimensions printed on them). I only replaced the tires on the rear axle because the front tires were still at 80%, but I put a different brand on the rear axle than the ones on the front axle. This didn't only triggered the "limited torque" message on the dashboard, as reported by others here in the forum who had recently their tires replaced, but it also caused a rough and noisy ride, which I can't see reported here in the forum by anyone else before, and which has less than nothing to do with the IWEs.
The reason for me to believe that having different brands on different axles is okay, is that I read it here in the forum that other people did this without issues. But based on my experience, which I gladly add to the forum content, one should have all 4 tires of the exact same model to avoid issues with the differential and related dashboard warnings.
As I found out in the meantime, the grinding noise is caused by the differential due to tires with unequal circumference (regardless of having the same dimensions printed on them). I only replaced the tires on the rear axle because the front tires were still at 80%, but I put a different brand on the rear axle than the ones on the front axle. This didn't only triggered the "limited torque" message on the dashboard, as reported by others here in the forum who had recently their tires replaced, but it also caused a rough and noisy ride, which I can't see reported here in the forum by anyone else before, and which has less than nothing to do with the IWEs.
The reason for me to believe that having different brands on different axles is okay, is that I read it here in the forum that other people did this without issues. But based on my experience, which I gladly add to the forum content, one should have all 4 tires of the exact same model to avoid issues with the differential and related dashboard warnings.