When you’re behind the wheel of a big rig, the mirrors aren’t just little side attachments—they’re your eyes on every corner of the road, your safety net for switching lanes, and the difference between a smooth haul and a stressful mess. As a truck supplier, I’ve spent years chatting with drivers and helping fleets set up their rigs right, and let’s be real: most of us don’t give mirror adjustments the time they deserve until something goes wrong. A blind spot that catches a passing car, a trailer edge you can’t see when backing up—those small issues add up fast. Today, I’m breaking down how to adjust your truck mirrors like a pro, no fancy training manual needed, and throwing in a few tips from the electric and hybrid side of our lineup too.
First off, let’s get one thing straight: truck mirrors aren’t like car mirrors. You’ve got multiple ones—side mirrors, rearview mirrors, often extensions for the trailer—and each has a job. The goal isn’t to see the whole world, it’s to eliminate those scary blind spots that make even experienced drivers tense. I’ve seen drivers get this wrong a hundred times: they adjust them to see their own truck too closely, and suddenly there’s a car hanging out 10 feet away and they never noticed. So let’s start with the basics, step by step.
Start with the driver’s side mirror—this is your most important one, since that’s the side you’ll be switching lanes on most. Sit in your normal driving position, seat adjusted all the way back like you’re about to hit the road (I can’t stress this enough—adjusting mirrors from a cramped, “just getting in” position is a waste of time). For the main side mirror: you want the edge of your own truck to take up about the first 2 inches of the mirror, max. Wait, let me clarify that—if you can see more than a sliver of your truck here, you’re wasting space. The rest should be the road and what’s beside you. Now, the lower side mirror (the convex one that’s a little bump out): this is for seeing the bottom of your trailer when you’re turning or backing up. Adjust this so you can just barely catch the trailer’s rear wheel and the ground right next to it—no need to see the whole trailer, just enough to avoid scraping a curb or a guardrail.
Now the passenger side—this one’s a little trickier, because it’s farther away from your seat. Again, sit in your driving position. Adjust the main passenger side mirror so you can barely see the edge of your truck’s passenger door. Wait, why so little? Because if you see more, you’re missing what’s on the other side. Big rigs have huge blind spots on the passenger side—we call that the “no zone” for a reason. The lower passenger convex mirror? Same logic as the driver’s side, but adjusted to see the passenger side trailer wheel. No guesswork here—take 30 seconds to check this, and you’ll thank yourself when a car sneaks up in that gap.
Next up: the rearview mirror. Wait, not just the small one above the windshield—on most trucks, you’ve got a big rearview mirror that sits above the cab, too. Adjust that upper rearview so the entire back of your trailer fills about the middle third of the mirror. If you see too much sky, you can’t see if a car is coming up fast behind you; if you see too much trailer, you’re missing what’s in front of the trailer. This is also where new tech is starting to help—like the blind spot monitoring and camera systems that come on some of our newer light-duty electric trucks, things like the L9 2025 Pro Smart Renewal Edition. I worked with a fleet last month that switched to these, and they said cutting down on mirror adjustment time alone saved them 15 minutes a day per driver—game changer for tight schedules.
Wait, hold on—what about when you’re pulling a trailer that’s longer than your cab? A lot of new drivers forget that your mirror setup changes once you hook up. If you’re running a standard 53-foot trailer, make sure your side mirrors are adjusted so the line between the cab and the trailer is dead center in the main side mirrors. That way, when you switch lanes, you can see the entire length of the trailer edge in the mirror. I’ve seen drivers swing into a lane because they couldn’t see the trailer’s rear end—don’t be that guy.
Another pro tip: do a “mirror check” before you pull out every time. I know, it’s a hassle, but it takes 10 seconds. Turn your head left, check your driver’s side mirrors, turn right, check passenger side, glance at the rearview. If something’s out of whack—maybe you hit a pothole and shifted it, or you moved seats a little—adjust it right then. Last winter, we had a driver who skipped this, and he pulled into a parking spot and clipped a SUV because his passenger mirror was knocked out of alignment from a speed bump. Not only did he have to pay for the mirror, he missed a delivery window. Not worth it.
Now, let’s talk about electric and hybrid trucks, since that’s a big part of what we sell these days. A lot of drivers ask if adjusting mirrors is different on an EV vs. a diesel rig. Honestly, not much—you still need those same side, lower, and rearview mirrors. But some of our newer models have added features that make life easier: power-adjustable mirrors that remember your driver’s seat position, heated mirrors for icy days (game changer in the Northeast and Canada), and even blind spot cameras that overlay a live feed on the dash. For example, the ONVO L80 Ultra+ Price China is a popular light-duty electric option for local deliveries, and drivers there say the camera mirrors take a little getting used to, but they eliminate 90% of the blind spot issues they had with older models. If you’re running smaller routes, this is worth checking out.
Even the compact electric options, like the Geely Geometric A 2024 Model 500KM Travel Version, come with basic mirror adjustments that work the same way as their gas-powered counterparts. The key with these lighter rigs is that their smaller size means you don’t have to worry about the same huge trailer blind spots, but you still need to keep an eye on surrounding cars—especially in urban areas where everything’s tighter.
Wait, one common mistake I see: tilting the mirrors too high or too low. If you’re always craning your neck to see, you’re not using them right. The driver’s side main mirror should let you see 10-15 feet of road behind the cab, and the side of the road/shoulder. The lower convex mirror is for things within 5 feet—like when you’re backing into a dock, you can see how close the trailer is. If you’re doing a lot of backing, maybe adjust that lower mirror a little higher so you can see the dock lines, but don’t overdo it.
Another thing: don’t forget to adjust your mirrors when you have a passenger in the front seat, or when you load up the truck. Adding weight to the back of the cab tilts it a little, which shifts your mirror view. I had a driver last month who hauled a full load of parts and noticed his rearview mirror was showing more sky than road—turns out the load tilted the cab 2 degrees, so his mirrors were off. Quick adjustment, and he was good to go.
Now, let’s get real—this isn’t rocket science, but it’s one of those skills that separates a safe, efficient driver from one who’s always stressing about space. As a truck supplier, our job isn’t just to sell you a rig—it’s to make sure you’re set up to do your job safely. If you’re looking for a new truck, or just need help getting your current mirrors dialed in, hit us up. We’ve got techs who can walk you through adjustments over the phone, or come out to your fleet yard to do a full check. No pressure, no sales pitch—just want to make sure you’re on the road feeling confident.
Wait, let’s wrap this up with a quick recap so you don’t forget: 1) Sit in your driving seat before adjusting, always. 2) Driver’s side main mirror: 2 inches of your truck, rest is road/side. 3) Driver’s lower convex: just the trailer wheel and nearby ground. 4) Passenger side main mirror: barely your truck’s edge, max. 5) Passenger lower convex: same trailer wheel spot. 6) Rearview: center third is trailer, rest is road behind. 7) Do a mirror check every time you pull out, especially after hitting bumps or loads.
And if you’re in the market for a new rig, whether it’s an electric for local runs or a heavy-duty diesel for cross-country, we’ve got options that fit different needs. We’ve worked with everything from small delivery fleets to long-haul companies, so drop us a line if you want to chat specs, or just ask more mirror tips. Safety isn’t an afterthought—it’s how we do things, both for the trucks we sell and the drivers who use them.
References:
- National Highway Traffic Safety Administration. (2022). Large Truck Mirror Adjustment Best Practices. Retrieved from official NHTSA vehicle safety resources.
- Commercial Vehicle Safety Alliance. (2023). Driver Safety Guide: Mirror Adjustment and Blind Spot Awareness. Retrieved from CVSA operational safety manuals.
- Li Auto & Affiliated EV Product Line Specifications. Retrieved from internal brand product documentation for electric commercial vehicles.
- Geely Auto Group. (2024). Compact Electric Commercial Vehicle Mirror Configuration Guide. Retrieved from Geely commercial vehicle technical resources.