I'm looking for after market wheels and tires for a 1991 Wrangler, no lift.  Moderate off-road use, mostly old logging and mining trails (lots of mudd and stumps), some sand and snow, only small rocks. 

Question: With no lift, what size wheel and tire should I use?

Question: What brand and type of wheel provides good value at an economical price? specifically should I use steel or aluminum? What about Beading? and what about off-set and other specs?; 15"or 16"? Any brand advice?

Any help would be appreciated.

By no means am I an expert on tires and wheels but I am running 15" Alba steel.  They are the only thing on my jeep that is chrome but they have been thru hell and back and have faired very well.  

You can run 31x10.50 15s under your Jeep without a problem or a lift.  You can actually stuff 33s under it, but you'll have very little articulation in the rear without rubbing the crap out of your fenderwell.  I wouldn't go any wider than 10.5" width no matter what you get.  I recommend BFG All-Terrains as I've had years of great service and treadwear from them.  As for what brand of wheel, it'sup to you.  I ran 10-spoke steel rims from American Racing on my '82 Dodge W250 and '97 Dodge 1500.  If you're going to beat the crap out of your wheels, don't spend a lot of cash on chrome or polished aluminum.  If you want your Jeep to look tough, go steel spokes from AR.  If you're into looks, too, go with some Eagle 589s.  They are the popular "bullet-hole" style and I've seen a lot on many different rigs.  Beadlocks?  No way.  Unless you're going to do some serious rockcrawling or dune-buggying, there's no real need.  I would say to make sure you don't go on the trail without 1. A buddy and his truck, 2. A 2.5 ton floor jack and piece of plywood OR a High-lift jack, 3. A fullsize spare with the same tire on the rest of the rig, and 4.  A tow strap and some 3/4" horseshoe clevises.

But hey, it's all up to you and what you're into.

Hope this helps.

Hey, I've been wheeling for awhile now, and the last thing you want is your tires to rub when you flex, I would go with 31's and no bigger, your best bet is BFG Allterains or Mud terains, to of my buddys have XJ body style Jeep's and I'm get one to build a rock crawller / mudder, also I recommend 15" wheels, warren, eagle ect

Good luck

Shayne

i agree wholeheartedly. do not go above 31x10.50x15 on a set of steel rims.aluminum will get bent easier on stumps