The first I bought when working in college was a 10 speed bike (back in 1973). It had to be a boys bike....hated girls sissy bikes without the bar...lol. Which meant it had to be a small bike because I was (& am) short. I had friends who rode & we would get together & ride all around the San Fernando Valley in Los Angeles. I owned a car but every good day I rode my bike 10 miles to work. LOL...it's not like I lost weight...muscle weighs more than fat & my thighs ended up getting so much muscle my tight jeans no longer fit my legs. Loved my bike. They are great exercise & just wonderful getting out & away