Today, two- and three-wheeled vehicles make up about a quarter of all cars, and they’re also becoming increasingly popular in Europe.

They’re also a little bit older, and a lot less fun.

They have a few key advantages: They’re cheaper, less noisy, and, for some, safer.

But there’s also some downside.

Here’s what you need to know about these two-wheels and three, and why they might be on your road trip next year.