Coil Open Black Rugged Outsole



  • Heavy duty outsole - thick off-road tread that holds up well in harsh environments
  • Ships as a pair
  • Embedded mesh fiber - for added strength
  • Our longest lasting outsole design


Step 1.  Remove the insole from each shoe.

Step 2.  Below the insole is a “trap door.”  Lift up the door and unscrew the spring with a Phillips screwdriver.  Tighten firmly, but use caution not to strip the screw head.

Step 3.  Re-attach the spring in EXACTLY the same orientation as the old spring.  Note: Z-CoiL springs can be adjusted in 90 degree increments to adjust for pronation.  Turning the coil will affect the resistance on the inside/outside of your feet and may cause under or over pronation.

 Step 4.  Call the Z-CoiL headquarters with any questions @ 800.268.6239

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