The R in the circle means registered trademark.

Our country’s definition of trademark is: Trademark (TradMark in English) refers to a mark used by producers and operators on goods and their packaging in order to distinguish their own goods or services from those of others. A visible mark consisting of words, graphics, letters, numbers, three-dimensional logos and color combinations, or combinations of the above elements.

R is the abbreviation of REGISTER, which when used in trademarks means registered trademarks. The Implementing Regulations of my country’s Trademark Law stipulates that the use of registered trademarks can be marked on goods, product packaging, instructions or other attachments. "Registered trademark" or registered mark.

Registration marks include (note plus ○) and (R plus ○). When using a registered mark, it should be marked on the upper right corner or lower right corner of the trademark. So it is normal to have an R and a circle on the Nike logo.

Extended information:

The Nike logo is a small hook. Nike has always regarded it as its glorious mission to inspire every athlete in the world and bring them the best products.

Nike pioneered hovercraft technology, revolutionizing sports. This technology could be used to create shoes that protect athletes' knees. Reduces impact on knees during hard landings.

On September 8, 2016, Apple and Nike officially launched the second-generation Applewatch product. On March 15, 2017, it was revealed that the air cushion of Nike Hyperdunk 08FTB (SKU: 869611-001) basketball shoes was described incorrectly.