Armrest Width-Reduction Spacers Compatible with Herman Miller Mirra 2
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Heavy-duty width-reduction brackets compatible with the Herman Miller Mirra 2 office chair.
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Is your Herman Miller Mirra 2 giving you shoulder fatigue because the armrests are placed too wide? These custom-designed, heavy-duty extension brackets shift the armrests inward to allow your arms to rest in a perfectly natural, ergonomic position.
Best of all: all of your chair’s original armrest adjustments still work perfectly! Adding this attachment does not block or compromise your ability to adjust the height, angle, or depth of the armrests—it simply shifts their starting position inward to save your neck and shoulders from fatigue over long workdays.
What's Included
Left Side Spacer Bracket (STL & 3MF)
Right Side Spacer Bracket (STL & 3MF)
Which file should I download?
Mirra_2_Spacers_Bambu_Optimized.3mf(Highly Recommended for Bambu Studio / OrcaSlicer): Open this file to instantly load a pre-configured print job. It includes the exact optimized speed limits, 4 wall loops, and the crucial 100% solid infill modifier cylinders placed directly over the screw holes. Just slice and print!Mirra_2_Left_and_Right_Spacers.stl(Universal): If you use Cura, PrusaSlicer, or any other slicer, import this file. To ensure the bracket is strong enough to support your weight, please apply the manual slicing settings listed below.
Recommended Print Settings (For Structural Strength)
Because this is a functional, weight-bearing part, do not print it with standard "draft" settings. For your safety and the longevity of the part, use these settings:
Material: PETG, ABS, or ASA (Do not use standard PLA, as it will deform/creep over time under the constant pressure of your arms).
Wall Loops:
4or5(Crucial for the structural outer shell).Sparse Infill:
15%to20%Gyroid (Saves material while keeping the core incredibly strong).Screw Hole Reinforcement: Use a modifier cylinder in your slicer to set the area immediately surrounding the three screw holes to 100% solid infill to prevent the plastic from crushing when you tighten the bolts.
Supports: None required (designed to print completely flat on the build plate).
Disclaimer
This is an aftermarket accessory designed to improve comfort and ergonomics. It is not affiliated with, authorized, or endorsed by Herman Miller.