Two years later mine are still good as new. I have stainless spokes (520) and the rim is 4 layer chrome.
Mine are called radial spoke, knock offs. $800each front $900 each rear. I love the look. The first coment made about the truck from anyone new, is about the rims. Cleaning .... you cool them with water, spray with dayton or mequires cleaner, rinse with water about two min. later, and blow dry with leaf blower. After cleaning I spraywash a wax on them at the car wash, and then blow dry again.
I cleaned mine with a sponge paint brush between spokes, once last year.
I went 18" and 20" because I like the rake look. Rear tire is 30" tall and have no rubs. front end was lowered by springs.