"Who wants a ramp? Who even wants to need a ramp? Certainly not me...until I did. After all the research--including actual math--I decided on this one. I live alone, so it had to be something I could wrangle on my own. And I ride a knee scooter, so it had to be safe for a device with a high center of gravity. It's lightweight, portable, affordable. The ridged surface is enough to keep the scooter from running away with me, while providing good traction to my pushing leg. A knee scooter's back wheels are only about 8 inches apart, and the hardware where the ramp folds is about 3 inches wide--narrow enough to pass between the wheels without a problem. -Kathy W."
"The bottom edge of the ramp is tapered so it's easy rolling--there's no initial bump on the way up. There are bolts if you want to fasten the top lip permanently to the door frame but it stays in place fine by its own sturdy weight. My 3-foot ramp is an easy, gentle slope for the 5-inch rise to my door. It's a good idea to google the proper ramp length for your situation. -Earl H."