From what I've read, anything over 15 on the road force numbers is getting bad. When I ran 285/75-16 Falkens, I fought with them constantly to keep them balanced. Never could get a totally smooth ride out of them. Those tires are just too heavy and have too much thickness to them. That's a good thing on the trail but it sucks for the highway.
'92 YJ - heavily modded
'96 ZJ - heavily modded
'05 KJ CRD Limited - 370 lb./ft. from a 4-cylinder and trail ready. Pure awesomeness.
'11 Mango Tango JKU Sport - Mods
'12 Dozer JKU Sport S - 6-speed - ACE rock rails - Max Tow package - Daystar spacers - 33x12.50 Duratracs