I did not read four pages of responses so I apologize is this has been suggested. I just took two scrap pieces of 1x6's cut to length and placed them in aisle. I then remove the front wheels of our 2 bikes positioned the bikes where they would not move - marked the boards and used mounts from Amazon. The bikes are inside, out of the weather and possible theft for about $70.00. Easy solution for me.
https://www.amazon.com/MBP-Alloy-Release-9x100mm-Storage/dp/B07MDXZGMB/ref=sr_1_3?crid=2IM1Y060167SW&keywords=bike+skewers+mounts&qid=1658186842&sprefix=bike+skewers+mounts%2Caps%2C74&sr=8-3
