Review on Replacement Parts for iRobot Roomba i7 i7+ i6 i8 i8+ i3 i4 E5 E6 E7 Vacuum Cleaner - iRobot Roomba i8 Replenishment Kit (1 Rubber Brush, 2 HEPA Filters, 2 Brushes) by Brandon Bugg

After installing the roller and starting the e5, it makes a lot of noise during operation and the machine vibrates. After examining the rollers, the rubber part (PVC?) is thin and they rub against each other. I immediately put on the original parts and restarted the machine, the noise was gone. I'm afraid if you don't eliminate the noise and vibration it will accelerate engine assembly wear due to frictional stresses. So I sent the whole set back.