The SRAM CenterLine X Rounded Rotor brings all the high-powered braking and effortless cooling capacity of the original CenterLine rotor and fuses it with a dual-material construction that pairs its steel braking surface with a lightweight and long-lasting aluminum centerpiece. Its 12-spoke design prevents lateral bending and warping under heat stress for confident stability and smooth, predictable braking. As with it single-piece counterpart, this rotor boasts venting lines across the braking track to minimize overheating and provide consistent power on wide-open descents and highly technical runs.Dual material rotor offering both lightweight and durabilitySteel braking surface and aluminum center piece for toughnessVenting lines in brake surface prevent overheating