Introducing BSD’s first ever rim. The NASA rim is designed to be stiff both laterally and radially. Based on an I-beam design with extra thick tapered sidewalls, tapered spoke seats, cross over lacing and a curved inner strut. Intergalactic. ###section### Product Specs WHEEL SIZE: 20" SEAM: Welded ERD: 388mm HEIGHT: 18mm WIDTH: 36mm SPOKE HOLES: 36h WEIGHT: 498g Colour: Chrome, Black, Carbon Grey