Specialized Levo Gen3 crank arm boot / bash guard (Praxis)

This is a bash guard for the Praxis crank arms used on the Specialized Levo gen3 e-mountain bike. This model should also work on any other bike or e-bike using this particular crank-arm.

A while ago, I purchased a crank-arm bash guard online, but it proved to be ineffective against the local trail rocks. I found a similar project with a much shorter and thinner bash guard, but I wanted a stronger version which protected a larger area of the crank arms, not just the tip.

Printing recommendations

• PLA. The walls are 2mm thick which should be plentiful for most rocks. I also tried a 3mm thick version and that should survive a direct strike from a cruise missile, so I think 2mm is enough.

• Strength: 25% infill, gyroid, 4 wall loops.

• Support: tree supports (for ease or removal).

• Print orientation: As set in the 3mf file included (basically, standing on the "open" side.)

Installation

• Remove your pedal (remember that the screw  always turns towards the back of the bike to unscrew and to the front to screw, no matter which side).

• Slide the bash guard in (logo facing outside, obviously).

• Replace the pedal.

Note: The model fits very tightly and you may need to use a small rubber mallet or a dead-blow hammer to insert it all the way. Use the screw holes as a guide to see when it's fully seated. Do not use a metal hammer directly on the model or on the bike. If you feel it's too tight, use your slicer to resize the part to 101% or 102% and that should make it fit more easily.

Happy trails!