I had originally ordered the 19s because I've what I've read here. My priority was to prevent the expense of replacing them so often and avoid what's been called a stiffer and louder ride and to save the $4,500 the upgrade would cost. Because I ended up buying a loaner, it came with 21s and I've got to say I really like them. They are certainly not rough or loud in my opinion and they do look really good. I think it will take a bit of practice to avoid rashing but I plan on being gentle with her for a while anyway.