It sure will!
I had our warehouse measure the Lippert Power Stance Electric Trailer Jack with Footplate - A-Frame - 18" Lift - 3,500 lbs # LC69VR you were looking at and from the back of the jack tube to the back of the head of the jack is 1-1/2" as shown in the included diagram.
I included a video of the # LC69VR for you to take a look at. view full answer...
Yes your current aluminum wheels and valve stems will easily be able to handle the higher psi rating of the trailer tire part # AM10235 that you referenced. What's also great about this Kenda Karrier trailer tire is that it has load rating of D, an 81 mph speed rating, and a 5-year warranty. view full answer...