Each ring is CNC machined from 7075-T6 aluminum, one ofThe strongest alloys availableToday (inner ring is steel for durability). Outer rings are made from 4mmThick plate, whileThe middle is 5mmThick for unsurpassed durability.The rings feature Race Faces patented SHIFTTechnology - hard-wearing stainless steel SHIFT chips for fast, predictable upshifts. AllThese features result in a ring setupThats 15% lighterThan last years lineup, while retainingTheir incredible stiffness. 22t inner is steel.
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