It sounds like you are looking for stabilizer jacks for your 2018 Forest River Shockwave travel trailer. Landing gear is something you would typically find on a 5th wheel. If you are looking for some manual jacks for the rear then I recommend the Ultra-Fab Ultra Scissor Jacks # UF48-979002.
If you're looking for electric stabilizers then I recommend the Lippert High-Speed Power Stabilizer Jack - White Switch Kit - 30" Lift # LC369774. This features legs that extend up to 30" for quick... view full answer...
I'm going to attach a dimensional drawing of the Timbren # TSR5KS02 for you to check out, and you won't want to install any type of spacer. I can see how what they're telling you might be confusing, but the suspension isn't going to be at full articulation at a full load of 5000-lbs. I do believe what they're saying is that under a full load the suspension will articulate to that point you've mentioned-which is going to put it close to the frame of the trailer- but not quite touching.
I've... view full answer...
With weight distribution systems like the Curt part # C17062 the reason backing up isn't recommended is because if you jackknife the trailer the spring bars will either pop out of the system with a lot of tension/force or a component of the system will bend/break.
So what you can do is back up basically totally straight with the system installed or you can remove the bars before making tight turn maneuvers. view full answer...