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I use a paint bucket for under the bike, and this bike yoke. It's not perfect, but if you fiddle with it, you can get everything elevated even if one of the tires is off. Another option is one of those stackable patio chairs. I had to put books to make that work, but it was pretty solid on there.
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This one is actually designed for ebikes. . . https://www.amazon.com/BIKEHAND-Electric-Bicycle-Floor-Parking/dp/B07V9YMK88/ref=sr_1_5?crid=28CY3OK7W0FZ0&keywords=Vertical%2BUpright%2BBicycle%2BFloor%2BStand%2Bfat%2Btire&qid=1654452857&sprefix=vertical%2Bupright%2Bbicycle%2Bfloor%2Bstand%2Bfat%2Btir%2Caps%2C176&sr=8-5&th=1. Let us know if it works!
https://www.amazon.com/gp/product/B07V9YMK88/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Can you see this link? If not search for on Amazon: BIKEHAND Fat Electric E Bike Bicycle Tire Floor Type Parking Rack Stand - for Mountain and Road Bike Indoor Outdoor Nook Garage Storage - Max Tire Width 4" Looks like it's out of stock now. It is sold in a pair, but I needed two...