70-80% on road. Roads here are bad though. We do get 6-18" of snow on occasion, also ice, and torrential rain. Tahoe is also the adventure vehicle, so it get's offroad for camping, hiking, etc. But the Highway miles is what I worry about. I'm a nurse, and travel a lot, so I need something comfortable, mostly quiet, but capable when I need it. People that I've spoken to that have this tire, who are usually quite picky about noise, vibration, etc, say it rides well and is overall rather quiet.
I've probably got 40k mor miles on the wranglers that are on the truck currently though, but I'm always looking for a sale!
Also,
@Galante I'm looking at doing the 285's on it, but I really wanna put 305/65 on it. We'll see if its worth the extra $$$