Step 6Ready the bottom wheel
iImage Information

After a bit of trial and error i found that it was important to notch out a section of at least the top flange of the bottom rim to allow the crutch to adjust in height while bolting the legs on securely. I drilled through either side of the adjustable leg portion and through the corresponding part of the rim. Then by sliding a few of the carriage bolts in i could mark the sections of the rim that needed to be trimmed back. I used the marker to also blacken the end of the bolt that was closest to the valve stem opening of the rim. That made sure i didn't have to fiddle with the rim and the legs trying to get bolts through misaligned holes. Cut the areas out for the center section of the leg. This could be done with a hacksaw and some frustration or you can use an angle grinder. Making a smaller cut on the bottom flange of the rim isn't a bad idea - if you tighten the rim and legs together too far the rim might press into the crutch leg and restrict the adjustment of the height.