If you’re into fancy rims and keeping them clean, Here is an easy trick but a little time consuming. Take each tire and rim off. Clean the tire completely and get rid of the brake dust and dirt. Let the rim dry fully, get some wax and wax the inside of the rim. This will help keep the tire clean and won’t let brake dust or dirt stick to the inner side of the rim. If you’re as crazy as I am with taking care of my rims that I paid a fair penny for them.