Hi, Minh.
I have two racks. One is in my living room (see pic, a Craigslist purchase), the other in my Breezeway. The rack in the breezeway is a Delta "lean on the wall" model. Not as secure, but also the feet don't stick out as much, so less tripping hazard as I walk (slink) by. Also, I keep the bottom bike on the floor for both racks.
For living room rack, notice how top bike goes in opposite direction of lower bike and the arm for the seat-end is higher than the arm of the handlebar end? That is so I don't have to lift it as high to get the top tire to clear the bottom handlebar.
Also, it's a big help to keep the front tire from moving. I use a John's Irish strap to lash it to the down tube. When lifting , I go as low as I can on the down tube and seat tube. I lift it in a different part of the living room, usually just back a few feet (where I have more room to wobble it around) and then walk it up and to the rack.
In the breezeway, a step-stool helps because I don't have as much working-room. I also use a step stool in the LR when I'm feeling especially tired.
To make lifting easier, I also remove the bags and water bottles, which saves a few pounds. Who needs a gym?
Roberta
On Thursday, December 9, 2021 at 4:38:37 PM UTC-5 Minh wrote: