You may already know this but I didn't until I started trailer shopping. Get dual axels, I started asking people about which trailer to get and several told me to make sure it was dual axel instead of a single axle but they didn't know why except for weight capacity. A single for weight capacity would have worked for me. Finally my brother in law who does alot of trailering cars and heavy industrial machinery told me why to get the double axle. If a tire goes down on a single axel you can be in deep dookie where a dual will probably keep you going till you can get it fixed. I bought dual axel.