Yes, the top rack is adjustable. But I have friends here with the exact same model. They have over-sized diameter plates like Ross and even with the top rack all the way up, it still blocks the upper wash arm form turning. I had the same issue when "Bob loading" Sat. night at Ross' during the wash-in. Ross you have to tilt the dinner plates over for it to clear properly. Which I've had to do at my firends' house and did at Ross' without a prob. I wish Ironrite could post a pic of the load I did cuz he said the master was at work loading it. I had to rearrange plates 3 times to get it all in there and not have the wash arm blocked. Hold on to that dw Ross, it's the last of the true WP PowerCleans (mourn).