I still enjoy riding a single speed at times. Like if I'm not in a hurry, or plan on being on mostly flat trail. My wife and I both have single speed Cruiser type bikes with Coaster Brakes (I think 44 18 gears certainly not speedsters). I installed a caliper brake on the front wheel of both bikes for safety reasons. Prior to riding the cruisers the last single speed I had rode was nearly 37 years ago when I was riding my old 20 inch wheeled Huffy Stingray type bike.

Riding a single speed can be a joyful experience under the right conditions, and can be one hell of a workout under the wrong conditions. At the tender age of 50 though, I find my knees vote for gears, and a lot of low gears to boot, spin, spin, spin.