The Aurora bridges the gap between platform, and cage pedals with a wavy, press-bent aluminum plate surrounding the main bodyUnique shape with well places protrusions and concave design provides both comfort and a high level of gripStandard cup and cone bearing system with 1/8` balls make the entire platform serviceable and rebuildable9/16`Loose BallPurple/SilverAlloy92x95mmUPC/EAN/GTIN: 4560369006717