I'm an older seasoned automotive technician, I'm reviewing this product based on my many years of experience in the field using high quality tools. I very seldom review a tool that is this worthless! I do a lot of alignments and have used all kinds of alignment equipment. This caster/camber gauge is like the old bubble gauges we used to use 30 years ago, they were accurate then and they are still accurate today. This gauge appears to be reasonably robust in design with a strong magnetic base. As long as you have some turn plates, you can do the caster swing and get a pretty accurate reading. Of course you need some sort of toe-in gauge to get a full alignment. Gauge comes in a storage case that uses plastic pinned hinges, so case should last a while. Kit comes with manual, but it leaves a lot to be desired. Price point is considered slightly high for this item.

After replacing all four tires on my old Japanese sedan, I drove my car straight into the concrete surfaced level garage floor which I checked with a six-foot-long level gauge. One area was lower so I shimmed under that wheel with thin vinyl tiles. With a half tank of gas and water jugs on the seat to simulate a driver, I rocked the suspension and checked that the vehicle was level with a spirit gauge, and then I took this new Zackman Scientific (AutoSolo) suspension-alignment gauge (Amazon ASIN B0CHQZFW4Y) out of the nice-looking well-designed red protective box it came in. At a measured 2 pounds in heft, I like that the aluminum Zackman Scientific AutoSolo alignment gauge feels solid in my hand and that it has clear readable bubble gauges with two adjustment knobs on the bottom.I began my measurements with this angle gauge starting with the front passenger wheel. After cleaning dirt from the hub, I carefully placed the magnetic base of the AutoSolo gauge onto the wheel hub. The magnet mount snapped on securely, holding firm. The bubble level on the gauge was my first guide. I gently rocked the car a little to settle the suspension, then watched the bubble. It centered almost perfectly.Now for camber (which is, I feel, the gauge's primary function). The main level on the AutoSolo gauge showed me the camber angle directly. I knelt down, eye-level with the dial, and noted the reading. It was slightly negative, maybe -0.5 degrees. Not terrible for my Japanese sedan of its age, but I jotted it down in my notebook. The instructions with the gauge were pretty clear how to use it and how to doublecheck against the manufacturer's specs.Then came caster. This was where the gauge's kingpin inclination feature came into play. I unlocked the steering wheel and, with the car on my level plates, I turned the steering wheel to the right, full lock. The instructions with the AutoSolo gauge specified 20 degrees in one direction, then 20 in the other. Since my steering wheel wasn't marked, I just turned it all the way to the right and held it there. I took another reading on the gauge. Then, I turned the wheel full lock to the left and took a third reading. The difference between those two readings, along with the initial straight-ahead camber reading, helped me calculate the caster. It took a bit of mental math and referring to the gauge's instructions, but it was doable. It wasn't as direct as camber, but having that kingpin feature made it possible.After that, kingpin inclination itself. The AutoSolo gauge's ability to measure the non-adjustable kingpin angle (also known as the steering axis inclination angle) was a bonus. By noting the camber reading at full lock right and full lock left, and comparing it to the straight-ahead camber, the math from the gauge’s instructions allowed me to get a good estimate. It wasn't something I expected to adjust, but it was a great diagnostic to ensure nothing was bent.Lastly I measured toe-in using the toe plates you see in my attached photos, but the AutoSolo gauges doesn't help with toe because the AutoSolo gauge shows angles of tilt wherease to is distances between wheels on an axle.Once I had all my numbers, I went to work making small adjustments, re-checking with the AutoSolo gauge for camber, and the tape measure for toe, until everything was within spec.Overall, considering what an alignment costs, this alignment gauge is great value for the money. That hefty two-pound magnetic AutoSolo alignment angle gauge was surprisingly easy to read even small angles and as a result, it made checking camber a breeze. By the time I was done, I felt a real sense of accomplishment because this AutoSolo alignment gauge gave me the power to check suspension like I never was able to do before.In summary I ordered this $110 Zackman Scientific (AutoSolo) suspension-alignment gauge to be able to make measurement checks at home. As you may know, caster, camber & toe (in that order) are the three most important alignment checks to make on your vehicle (along with the non-adjustable kingpin inclination angle). This AutoSolo magnetic alignment-checking gauge allows you to measure all of the above, except toe.

Works very well with a little practice.

Easy set up already have done 3 alignments

Good quality

Bueno

This gauge is very accurate and is simple to use. I used it to align a 1965 Corvette and the results were outstanding.

Exelente

AutoSolo Magnetic Camber, Caster & Kingpin Inclination Wheel Alignment Gauge

Works. Looks like the more expensive pro one

Great tool for the jobMundosuspension on instagramMobile wheel alignments in California

Great product a lot better than I expected. Excited about finally getting to use it. Very nice company to do business with. Nice case it came in as well

The directions and videos are vague.

Works great

Worked great

Works perfectly!!

Worked as expected

Buenos

We have a little car we use for AutoX. We are constantly fiddling with the suspension geometry and need to align things again after we do that. In the past we just used the old string and ruler trick but that only gets you so far and doesn't handle all of the geometry. That's where this helps out greatly. We tested it against our string method and found that we were getting pretty close already but now we feel more confident that our alignments aren't going to wear out our tires sooner than we planned. The price of the tool is well worth the peace of mind it gives.

It looks. like a professional quality piece of equipment. The magnet holds well, you really need the wheel clamp for most cars (it will not stick to aluminum wheels and most cv axles stick out enough to interfere with a flush mount), I don't think it is accurate sticking it on the brake rotor surface. It works well for me, and I think it is a fair price deal

The AutoSolo Magnetic Camber Caster Alignment Tool is a surprisingly high-quality addition to my at-home alignment kit. The analog design is a standout—unlike digital gauges that can lead to overthinking, this one gives clear, reliable readings, letting you know exactly when you’ve hit the mark. I’ve used it over several weekends on my sedan, and it’s made checking camber and caster straightforward, with the kingpin inclination feature adding extra diagnostic value. The build feels solid, with a strong magnetic base and clear bubble levels, exceeding my expectations for the price. The only hiccup was that it wouldn’t attach directly to my recessed wheel hub, requiring an extra frame for proper use, which added a step. Once set up, it performed flawlessly. For DIY mechanics who value analog simplicity and precision, this tool is a great investment—just ensure your hub setup is compatible.

This magnetic camber/caster gauge is easy to read and pairs well with the company's wheel clamp. I prefer these manual gauges over the digital ones because you don't have to worry as much about calibration. Mine also came in a blow mold case for storage. Overall build quality of this tool is great! This is a fantastic tool for DIYers who like perform their own wheel alignments.

Perfect for the aspiring DIY alignment artist. Has the potential to save you a lot of money at alignment shops, once you get comfortable with its use. I've used the smaller alignment bubble gauges, and this one blows them out of the water in terms of functionality and ease of use. Mainly it's just that the additional size makes it a little easier to adjust and dial in. The build quality is alright, nothing spectacular - it's definitely got an air of cheapness to it despite being made of all metal materials. The carrying case is a nice touch and keeps other tools and hardware from getting magnetized to its base. You will almost certainly need the accompanying wheel clamp to mount this to - I don't know how you'd use it on most cars without one unless you happen to be using it on a 4X4 vehicle with manual locking hubs in which case you MAY be able to remove the hub lock and put it right on the outer hub surface. Personally I'd just shell out for the clamp.

Nice aluminum construction. Works just like the one I used 50 years ago when I started out in this business!

Work great

Funktioniert super hab damit mein Sturz und Nachlauf an meiner Yamaha Raptor eingestellt. Wenn man bei der Funktion einmal durch geblickt hat ist es echt einfach zu bedienen. F�r den 20� lenkeinschlag hab ich mir eine Winkelmessapp f�rs Smartphone runter geladen, es am Lenker befestigt und bei Gradeauslauf genullt. Hat super funktioniert.

Funktioniert super. Habe damit meinen Sturz und Nachlauf an meiner Yamaha Raptor eingestellt. Wenn man die Funktion einmal durchblickt hat, ist es wirklich einfach zu bedienen. Für den 20° Lenkeinschlag habe ich mir eine Winkelmess-App fürs Smartphone heruntergeladen, sie am Lenker befestigt und beim Geradeauslauf genullt. Hat super funktioniert.

Very good tool and instructions very clear.