These tires work great on my 690. The hardest part of the job is removing the old tires which are very firmly attached. They have been in the Roomba for a few weeks now and show no signs of wear. In general, they are of great value. EDIT: Less than 3 months later these tires failed. The problem is that they have lost all friction between tires and wheels. As a result, the Roomba could not drive on the transition strip between the living room and kitchen, the wheels were spinning, but the tires were stationary. This is a far cry from the quality of the original tires which lasted 3 years but it seems everyone else is the same. The solution is to put a few small drops of CA on the wheels to secure the tires. Now we're back in business.
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