Build a Bike Boom Box

Step 9 Mount the rack to the conduit

The aluminum bar comes into play in this step. Hold it across the rack resting on the conduit pieces, and mark where to cut it off and where to drill two holes that will contact the conduit. See the photo for details.

Cut the bar with a hacksaw, then cut another piece of identical length. File down the saw burrs.

Center punch the hole marks, then drill a 11/64" hole in each position with the two bars stacked on each other to get the holes in the same place. Or drill one bar and transfer the marks to the second bar, then drill it.

Now that the bars are made, use them to hold the rack onto the conduit pieces. Hold the assembly together with one bar in place. Put the bar against the rack's center support rod as shown. Drill 7/64" holes through the bar holes into the conduit, then install screws into these holes. Repeat for the other bar, but it doesn't have to be in any particular position. See photos.