My original tires had treads coming loose and when Braava was contacted to see how I could pay for their repair, Braava Customer Service "offered" me to buy a new block. Yes, Braava wanted me to spend $300 instead of changing tires. The tires I bought from this seller were almost identical to the original tires. The only reason I gave it 4 stars instead of 5 is because I had to apply some extra glue to make sure the splints were secure. This was my personal preference as I may be a little more prone to OCD than most shoppers. Great alternative and saved me a lot of money.