Review on iRobot Authentic Replacement Parts: Roomba 800 & 900 Series Multi-Surface Rubber Brushes - Get a New Set Now! by Dawn Wright

I'm not sure why the exact same OEM part increased the noise on my 960 so much, but it did. Honestly, I wish I had thrown away the brushes they replaced. After a few years of use they're definitely showing some wear, but not as much as I thought when I placed this order. Consistency seems to be an issue for the Roomba brand as a whole. Sometimes you're lucky and everything works as it should, most of the time it doesn't. Would I buy them again? No, and if I had kept the originals I would have sent them back.