I'm not at our rig, but I'm wondering if anybody knows what tires would be on our 2009 Bighorn, 3670RL. No doubt they are the original tires, and I had recently looked at them, and while they look fine, I think I see the date code, ending in 3806, meaning they were mfg'd on the 38th week of 2006, making them 7 years old. I was hoping to make some phone calls asking for quotes, but I don't know what to ask for. I know it's a G rated tire also. Any info on what to ask for would be appreciated....(until I can get to the rig for the exact numbers on the tires)