You might have seen a semi-truck with a giant spoiler perched atop its cab and wondered what that large panel was for. Although these features look similar to spoilers and are also there to help with ...

Have you ever wondered why some semi trucks have one set of wheels and others have two sets crammed together? That's because some semis use a single axle while others have tandem axles, but why is it ...

Most modern cars stopped using drum brakes years ago, adopting disc brakes for their improved performance and heat resistance. Those sound like pretty good reasons, so you'd think they'd be just as ...