Technically, no vehicle should be sold without a reverse gear. It's a fundamental safety and maneuverability feature.
However, there are some exceptions:
* Very old vehicles: Some extremely old cars or vehicles might have been manufactured before reverse gears were standard.
* Specialty vehicles: Some specialized vehicles designed for specific tasks might not have a reverse gear. For example, a vehicle designed solely for moving forward on a track might not need reverse.
It's important to note: Even if a vehicle lacks a traditional reverse gear, it might have other ways to move backward, like a special "crab" mode in some all-terrain vehicles.
