This is a crown race adapter for use of aftermarket Air or Hydraulic Forks on compatible Super73 Models!
The factory forks have a unique design that keeps the stem bearings compressed and centered when installed. This is necessary to keeping the fork aligned, reducing wobble, and maintaining the life of your stem bearings.
Please confirm that your factory forks have the same crown race as shown here before ordering.
Available separately: Stem spacers (40mm x 2 = 80mm total)
For use on the Z1, with 150mm 20x4.0 1-1/8 forks. Link to the one I used here: https://amzn.to/43GzJuK (affiliate)