In my opinion, the biggest con is that most tires in this size are made for heavy duty pickups and are very heavy. Therefore, the treadwright offerings will be even heavier than treadwrights other sizes. I personally wouldn't do it. I'd stick with 15" wheels and order tires from discounttiredirect.com to save cash, fuel economy, braking, and acceleration.
'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