Modeled after SRAM's gravity-oriented Code brakes, the G2's offer "mini-Code" power in a trimmed-down package. This makes them a great option for our trail bikes because they still offer impressive stopping power and 4-piston calipers, without any extra weight. These G2 R disc brakes are the entry-level model, but still offer the same power, modulation, and tool-free reach adjustment as the higher-end offerings.