SRAM Centerline Round Edges Rotor - 6-Bolt The Centerline Rotor was designed to keep the center of friction consistent throughout rotation thereby minimizing vibration offering consistent performance and a quiet ride. This version features rounded edges for UCI-compliance and to allow for easier wheel changes. Disc: 6-bolt | 140mm, 160mm, 180mm, 200mm, 220mm Included in delivery: 1 brake disc with 6 screws Manufacturer item code: 140mm: 00.5018.037.012 160mm:00.5018.037.013 180mm: 00.5018.037.014 200mm: 00.5018.037.015 220mm: 00.5018.037.031 Material: stainless steel Weight supplement: 160mm | weighted by Bike24