They are called side mirrors, also known as outside rear-view mirrors.
In trucks, you’ll typically see exterior side mirrors mounted on the doors along with an interior rear-view mirror inside the cab. Many rigs also employ supplemental mirrors—such as blind-spot mirrors or extendable tow mirrors—to enhance visibility around wide loads and alongside trailers.
Terminology and main types
Here is a quick guide to the main categories you’ll encounter on trucks.
- Exterior side mirrors (outside rear-view mirrors) — the primary mirrors mounted on the doors or fender that show the lanes beside and behind the truck.
- Interior rear-view mirror — the mirror inside the cab that reflects traffic from behind through the rear window.
- Blind-spot/convex mirrors — smaller mirrors attached to the exterior mirrors to widen the field of view and reduce blind spots.
- Tow mirrors (extended mirrors) — larger or extendable mirrors used when towing wide trailers or equipment.
Understanding these categories helps drivers identify what to replace or upgrade and informs discussions with mechanics or dealers about safety equipment.
Common configurations and features
Truck mirror setups vary by vehicle size and intended use. The following features are commonly found across many trucks and can influence driver visibility and comfort.
- Dual exterior mirrors — many trucks have both a main exterior mirror and an additional mirror for close-quarters or towing visibility on each side.
- Supplemental blind-spot mirrors — small convex mirrors that attach to the main exterior mirror or are integrated into the housing.
- Heated and power-adjustable — heating to prevent fogging or icing, and electric controls from inside the cab for easier adjustments.
- Folding and extendable designs — mirrors that fold inward to avoid damage in narrow spaces or extend outward for better trailer visibility.
Equipped with the right features, these mirrors can significantly reduce blind spots and improve lane changes, backing, and overall safety on the road.
Summary
Truck mirrors, commonly called side mirrors or outside rear-view mirrors, come in several forms: primary exterior mirrors, interior rear-view mirrors, and a range of supplementary mirrors for blind spots and towing. When choosing or upgrading, drivers should consider visibility, adjustability, warming, and whether extendable tow mirrors are needed for their operations.