Not sure about brand. But definitely a tandem axle. When I bought my Voyager it came with a single axle with 13" wheels. Its a big boat and squatted the tires. Made me nervous. I put the boat in a slip temporarily and took the trailer to a local trailer shop. This is a place that sells all kinds of utility trailers. They ordered a tandem axle kit and installed it all under $1000. It came with new 15" wheels and tires, bearing buddies, springs, axles, hubs, the works. They did a very good job but will not recommend them for other reasons (owner is a prick). Its sits pretty high but I can pull it with confidence and not worry. Well worth the $1000 to me.
If it ain't yours don't mess with it!
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