What is the gear-range difference compared to existing 2x systems, both Shimano and SRAM? September 26, 2017 16:04 SRAM 2x11 systems are 540 percent; Shimano 2x11 systems are +/- 500 percent. Related articles Can you explain how/why a larger pulley wheel in the Eagle™ RD makes for “crisper, more efficient and quieter” shifting? Is the 12th gear achieved by pushing the 50-tooth cog over the hub body toward the wheel, or with tighter overall spacing between cogs? What Eagle™ parts are cross compatible with existing 11-speed SRAM components? What are the comparative weights of Eagle™ to their non-Eagle™ counterparts (XX1 and X01)? I want to build a MTB with drop bars for bike packing. Will my road shifter work with my MTB rear derailleur, or vice versa?