In bicycles:
* Single-speed bike: This is a bicycle with one gear, meaning the rider can't change the gear ratio. It's typically simpler and lighter than bikes with multiple gears.
* Single-speed hub: This is a hub in a bicycle that has only one gear, requiring the rider to pedal at a fixed gear ratio.
In other contexts:
* Single-speed motor: A motor designed to run at a single speed, often found in simple appliances or tools.
* Single-speed transmission: A transmission system with only one gear ratio, usually found in older cars or simple machinery.
To understand the meaning of "1-speed," you need to consider the context in which it's used.
If you can provide more information about the context, I can give you a more specific answer.