Here's how I secured my 2013 RTL to the trailer.

[Jackhartjr]

Awhile back I asked for suggestions on how to tie my Spyder down in the enclosed trailer.
I simply got some Z-track, screwed it to the floor.
Then from E-Trailer got two wheel chocks that attached to the z-track, and some straps that attach behind the front tires, come around the tire, and are tied down at the front.
The rear tire is sitting on a piece of tire tread to prevent any movement.

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[CopperSpyder]

Awhile back I asked for suggestions on how to tie my Spyder down in the enclosed trailer.
I simply got some Z-track, screwed it to the floor.
Then from E-Trailer got two wheel chocks that attached to the z-track, and some straps that attach behind the front tires, come around the tire, and are tied down at the front.
The rear tire is sitting on a piece of tire tread to prevent any movement.

I do the same thing on an open trailer, but I do strap down the rear tire also. The rear may bounce a little if you don't. Nice setup!!

 

[rugerbear]

What trailer do you have?

 

[Jackhartjr]

It's hard to believe, however, my sweethearts son's fiancee's dad had it, a 1998 Pace American, a 12X6 that he hauled his Harleys in. When not being used it was garage kept, inside.
Still has the original tires from 1997! Trust me. I will replace them asap!
It is not tall enough for me to fully stand up in. He bought it that way in order to drive it in parking garages.
I get three inches on each side, but it fits!

 

[gkamer]

Still has the original tires from 1997! Trust me. I will replace them asap!

25 year old tires! Yeah it's probably time for new sneakers. :roflblack:

 

[Spyderman2018]

Yeah, alot of people don't realize the door FRAME opening is what matters, not the actual width of the box...