I am shopping for a tire changer. It seemed like I only had a choice between the Harbor freight device and the Coats 220 in a manual style. Then the price jumped way up for the automatic ones. I came across yours but I'm not sure if I can trust it. I've never seen a lock system like it. Can you reassure me? Is it easy to use? How do you figure out what the adjustments should be for the wheel sizes?

Great questions. We've heard these a lot. First, I will remind you that our machine cannot scratch your wheels (When used correctly). This is the most important thing in our minds as it is the aim of our company to offer a completely safe product that will perform Scratch Proof tire changes, every Time. Also, we want every Motorcycle Enthusiast to want, need, and be able to afford our products. Comparing to Harbor Freight style machines (There are a couple others out there) with the traditional Wheel Vice and all Metal bar, isn't a fair comparison. What do you want to trust with your expensive wheels.
Our machine is easy to use. The easiest tires to change are sport bike and shorter side-walled tires. The stiff touring tires are a bit more work but if you follow our "Tips" you will change them successfully with a little more effort – and all ScratchProof.
Adjusting for wheel size is simple. See our "Tips" for a better understanding of the process. Most people will usually change 1 or 2 different sized tires. When you find the correct setting, usually after 2 or 3 trial and errors, you can mark the blocks with a Black Pen for future reference. Our locking system has a smaller range between adjustments than conventional Wheel vices. One style 17" wheel can vary as much as 3/4" from another. Once you establish your adjustments, Wheel clamping is a "No-Brainer" and Faster!
You mentioned the Coats 220 Manual changer. This is a common heavy-duty machine and has been widely purchased by shops and individuals for quite a while. Long enough for a lot of scratched wheels and broken wheel vices. 3 out of the 4 machines I've Known people to own (and have owned myself) have broken the metal jaw assembly. Wheel slippage, expensive failing jaw protectors, Expensive M/D Bar Protectors and a head rush while sweating and holding a wheel on my toes with a tripled chunk of cardboard to break the tire beads have helped me to engineer the solution to everybody's Coats and Harbor Freight frustration.
We offer a Replacement Wheel Lock, Bead Breaker, and Demount Bar for the Coats 220 that will greatly upgrade that machine. Unfortunately the bead breaker is still down low in an inconvenient position. However, with our non-marring upgrade, it won’t scratch your wheels anymore!