XR stands for EXTRA RAD. We turned the Rifty E up another notch with this one - RockShox Lyrik Ultimate fork and Super Deluxe Ultimate Shock, SRAM GX Eagle T-Type drivetrain, next-gen Shimano EP801 motor, SRAM Code 4-piston brakes and Vee Tire Co rubber. And the cherry on top? SRAM AXS wireless shifting and a wireless RockShox Reverb dropper post. Our highest spec, highest tech Rifty E ever.