When we ordered our Winslow from the now defunct Peterson Ind., disc brakes and 17.5 wheels were an option, which I never gave a second thought. I wouldn't be without them. It is kind of disappointing to hear that Northwoods does not offer them as an option, as they would be high on our list if and when we decide to make a change. I know you can get them after market but it would be nice not to have to go that way. Not related but the other thing about Northwoods that I would hope to see change is offering a residential fridge, which I do not think is an option at this time.