Tires on 2000

Lifting my truck with wheelers 5 pack and ome 880s in front. I want to run a 32 in tire in the skinniest width I can find. Seems like all the posts I see everyone is going as wide as possible. I think thinner tires do better in all my applications. I'm not worried about looks. Need something that performs good offroad and ok onroad. Was thinking 32x9.5x15. Anyone else have a setup like this or can you point me in the right direction.

 

not sure if you have stock wheels but a 9.5 inch wide tire is really narrow. stock width is 10.5. i think the rim is only 8? correct me if im wrong.

 

What kind of tire is that and do they make it in a 15?