Which is better, single speed or three speed? I am 45 and buying an adult trike because I never learned to ride a bike when I was younger. I don't know if I get a single speed or three speed?
Because of your interest, age and desire to ride a trike, I would recommend a 3 speed. Trikes are very heavy and if you are new to biking you may need an easier gear than what a single speed will offer stock on most trikes.
I have a trike that was single speed; I found it very difficult to ride on an upgrade.
I've converted it to five speed with a Sturmey Archer kit and it made a world of a difference.
I love to ride a bicycle, however at age 75, my balance is not very good anymore, that is why I've switched to a trike. I would never tell you to ride a trike, my preference is a bicycle unless you have physical limitations.