Every bit of engineering and technology that went into the development of Red and Force DoubleTap shifting technology is present in the Rival version of the shifter. You'll experience the same mechanical simplicity, ergonomic comfort, and shifting quality. Blindfolded you can't tell the difference between Red and Rival shifting. This second-generation Rival shifter is built with a carbon brake lever, saving 40g over the first-generation version. Other second-generation improvements include the addition of SRAM's Zero Loss shifting and the ability to trim the front derailleur. The brake lever is longer than the first generation, and the shift paddle is widened and extended. You also get added cable routing options so you can run both the brake and shifter cables along the front of your handlebar. One final improvement is the addition of SRAM's reach adjustment feature, so you can customize the lever to the size of your hands. Please note, due to the closeout nature of this product, these shifters are only shifting with derailleur cables. Derailleur housing along with brake cable and housing will need to be purchased separately.