K-set - The gears on the back of the bike. They’re just gears. But t

The gears on the back of the bike. They’re just gears. But they’re the ones that make you look like a total idiot if they fall off.

My K-set fell off. I had to walk. I hate walking.

I was biking fast, my K-set fell off. I looked like a total idiot.

My K-set is the reason I failed my bike test.