Some riders are instant converts to Rotor's ovalized chainrings, while others remain staunch believers in traditional round rings. And while Rotor has sold round and oval rings for road, its foray into mountain biking is relatively new. The RX2 Inner Chainring was designed specifically for mountain bikes and features identical construction to Rotor's Q rings, without the ovalized shaping. The RX2 rings were CNC machined from 7075 T6 aluminum and feature stainless steel pins. They were designed as the inner ring in a double ring setup and are compatible with the Rotor REX 3. 2 crankarms. The Rotor RX2 Chainring comes in sizes 60mm22t, 60mm24t, 60mm26t, 60mm27t, 74mm24t, and 74mm27t. They are Black with etched graphics.