Ordered small caster wheels for YS640 smoker. This is 2nd set that bearings have gone out on. Was quite happy to see they have gone to a heavier-duty wheel. Hopefully these will hold up longer. I don't fault ATBBQ, as I understand they did not manufacture the bearings in the caster wheels and I know that getting products with sound bearings is becoming a common issue. As always ATBBQ's service was first rate. They immediately acknowledged my order, emailed me when it had shipped (all the day after ordering on a Sunday), and I received the following day.