What does the 'R' rating mean?

Answer 1

It means that nobody under 17 is admitted without a parent. It may contain strong languange, nudity, blood and gore, and other things. Interestingly, the "R" rating contains more films than any other catagory.

From the MPAA website:

R - Restricted. Children Under 17 Require Accompanying Parent or Adult Guardian. An R-rated motion picture, in the view of the Rating Board, contains some adult material. An R-rated motion picture may include adult themes, adult activity, hard language, intense or persistent violence, sexually-oriented nudity, drug abuse or other elements, so that parents are counseled to take this rating very seriously. Children under 17 are not allowed to attend R-rated motion pictures unaccompanied by a parent or adult guardian. Parents are strongly urged to find out more about R-rated motion pictures in determining their suitability for their children. Generally, it is not appropriate for parents to bring their young children with them to R-rated motion pictures.

Answer 2

R-rated tires (up to 106 mph). N-rated through R-rated tires are only available for light trucks and not passenger vehicles.

Answer 3

r-rated means restricted-under 17 requires accompanying parent or adult guardian. it contains some adult material and no kids under 17 admitted without the company of an adult.