The 333 rim is a pinned double wall rim made from 6061 aluminum. The 333 rim features a deep concave center for increased strength and stiffness. Comes with thick cinema rim tape. ###section### Product Specs WHEEL SIZE:Â 20" SEAM:Â Pinned ERD:Â 396mm HEIGHT:Â 17mm WIDTH:Â 31mm SPOKE HOLES:Â 36h WEIGHT:Â 473g