Product review (5 stars): Works Great -- Very Affordable also
I have a Whirlpool Ultimate Care Dryer and after doing some research on my very noisy dryer, I realized, I needed to replace the Drum Roller's.  I found this on a bunch of other sites for $30 bucks, and saw it on Amazon here for much cheaper, and pulled the trigger.

The installation was easy (do a search for a video on how to if you need).  One important thing to remember is to WD40 it a bit after you install it, or it will squeak a little bit.

Noise is gone and my dryer is back to normal.