A lighter, more accurate power meter completely integrated with the philosophy and performance of SRAM RED. Advances in technology and performance paired with unrivaled ease of use. The sleek new geometry reduces system weight and delivers clearance for oversized frames and aerodynamic chainrings. The only visible power component is the low profile, all aluminum battery case. New stress flow lifts accuracy to 1.5% and makes power measurement independent from chainring selection. Integrated electronics minimize interconnections and reduce exposure to the elements. Bottom Bracket NOT Included.