They are Wrangler MTR with kevlar. A few weeks back I was out four wheeling with a friend of mine, who is the editor of 4-Wheel Drive & Sport Utility Magazine. We were in the Jeep and were having a hard time getting up a near vertical rock ledge because I couldn't keep the Jeep's front end on the ground. My friend told me I needed a lighter spare tire, because all that weight on the rear of the Jeep was contributing to the wheelie problem. I have 37x13.50R-17 Toyo Open Country MT tires on the Jeep, and if I switched from one of those tires as my spare tire, to a 35x12.50R-17 Goodyear MTR with Kevlar, it would weigh 70 lbs less. I decided to take his advise, and switched spare tires. The difference in weight on the back of the Jeep was remarkable, and I could tell a difference even in just around town driving, by not having so much weight so high up and so far away from the center of mass of the Jeep. That was my first experience with the new light weight Goodyears, and I decided to try them on my wife's truck. It only has a 5 cylinder engine, so doesn't have an over abundance of power, but I'm happy with the tires so far. They don't seem to kill the power like I was afraid bigger tires would. And they seem to grip well offroad as well.
Oh, and I don't have the tire changer any more. I bought it for $600, so when someone offered to buy it from me for $1600, I sold it.