The Trailer Aid works great! Soooo easy and safe. No jack, stands, crawling around on your knees or getting under the unit, just stick it under the good tire and pull forward [or backward] till the tire is on top. Change the bad tire and pull off the Trailer Aid. Done!
You can change one tire, start to drive away, with the TA in less time than it takes to jack up the unit with a bottle jack and way less effort.
I thought it was a joke till I bought one and used it. I borrowed my friends TA and along with mine, swapped left side tires with right side tires in about 45 minutes. Saved $100 that the tire shop wanted to charge me to do the same job.
They are well worth the price. IMHO Unless you have actually used one, you don't have a clue. I sure didn't.
2013 Silverado 2500 HD Duramax/Allison Tuned
Aviator Wright Flyer #1919
"First In, Last Out". 11B4Y
DAV, MOPH, VFW, 5/7 Cav,1/8 Cav Assoc.
11th ABN Pathfinder Co. N7MIP