one axle vs. two axles on short TT (20')

Like a few, I had a previous 19ft TT with 2 x axles. IMO, get TT with 2 x axles. More brakes, smoother ride, less risk of damage from tire blow out, etc, etc. I never regretted my previous 2 x axle TT trailer. I have a 6x10 utility trailer with 1 x axle (3,500 lbs). Knowing what I know today, I should have bought this same size utility trailer with 2 x axles. Lesson learned for my future utility trailer buy. IMO, 2 x axle trailers are much better than 1 x axle trailers (within same 3,500 lbs range).

the bear II wrote:
You normally don't see two axles on anything under 23ft.

As one who owns a 19' dual axle trailer I can tell you there are all sorts of sub 23' models from many manufacturers with dual axles, my own Coachmen Freedom Express 192RBS being one of them. While some manufacturers do still skimp on axle ratings Coachmen in my case didn't as my FE has a substantial CCC exceeding a ton whereas similar models from other manufacturers can be half that. Personally, I'd not want another single axle trailer (as were our popups) as they're too quick to turn when backing up and don't offer the cargo carrying capacity I have with my dual axle. That said, it seems to me the OP's question is redundant anyway since any 22' trailer (the length he's talking about) that has a dry weight of 3500 lbs will by definition weigh much more than that loaded & ready to camp, more likely close to 4500 lbs, in which case it's unlikely he'll find a single axle in that size anyway.

I would choose two axles over just one for a couple of reasons, but single axle trailers have been around forever and there are no real issues with going that route. For that size TT either set-up will perform well.

Two axles increase the load capacity. You normally don't see two axles on anything under 23ft. Some shorter toy hauler models will have two axles.

Only real difference is capacity on the plus side. Stability, more stuff, more brakes, more tire contact patch...etc.

On the negative side more maintenance...4 tires/ 4 brakes/ 4 springs.