Originally Posted by spinlock
You might even be able to fit 14" rims if you can find them.
Stick to what fits the JK correctly. The JK brakes are too large for 15" rims even though you can force fit them.
Go with 16" or larger. Quadratec is not completely off base. There are plenty of 12.5"+ wide tires for 16,17,18 & 20" rims.
Based on that recommendation should he do no mods that are not just OEM swaps, or because he likes the wheels and tires should he get what he likes and is proven to work just fine. Lots of mods are not OEM fit or finish, tie rods, lift kits, coil overs, tires, shocks, even head lights. Massive oversized break rotors are another example. The list is very long, very long indeed.
You shouldn't get 37" tires because they don't jive with the factory gear ratio....wow really.