Unistrut Trolley Bicycle Wheel Storage

A trolley I made for the unistrut that I hung in my garage to store spare bicycle wheels and tires.  I used standard 608 bearings 8x22x7 and park tool 470 storage hooks https://www.parktool.com/en-us/product/storage-hook-oversize-machine-thread-470

I prefer the 470 for modern mtb tires and for deeper section road wheels.  The 450 is too small in my experience.  

I used standard 1 5/8" unistrut.  I'm sure there are other sizes but this is the most common and the stuff you can get at the hardware store in the US.