Product review (5 stars): So far so good. The front rollers went out on my dryer
So far so good.  The front rollers went out on my dryer, but I went ahead and replaced all of them since I was in there.  The back ones are a little more tricky, but not bad if you use a box end wrench and slide it up behind the rear panel.  Wrench sizes may not be the same as the ones you remove, but the wheels are the right size.