I carry a small 1.5 ton bottle jack and I have had to use it twice on the road. Once was a when I picked up a nail in a parking lot and once was when I noticed separation on one of my 4 year old Maxxis 8008's when pulling chocks in a campground. Both times I was (luckily) close enough to a tire shop that I didn't have to put many miles on my spare...which is a spare for a reason. I use the bottle jack on a spring pad. I tried running the "other tire" up on levelers, but after four levelers and running halfway across the parking lot trying to get the bad tire off the ground, I gave up and pulled out the bottle jack. I'll not try the levelers again for changing a tire. Any heavier trailer and I will need to get a heavier jack, but the 1.5 ton is good for now. Good luck.