33 yes, only gain 1/2" clearance but look good in the wells. 12.5 though? Meh. No thanks. 33x12.5 looks like you are riding on a beach ball. Prefer 10.5, but have 11 myself.
Stock wheels will need serious back spacing

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You're really limited on what 15" rims you can run on a JK. Look into 16"s. I run a 285/75/R16 on mine. Right at about 33" diameter and a round 11" wide. Lots more options with 16" or 17" rims.

 

I've already got the rims picked out that I want, the american racing 172 baja's, my main thing is the tires. I want to go with a 15" to keep the weight and tire cost down mainly.

 

My TJ came with 33x12.5x15 mudders...it was a joke to drive. I was tracking everywhere when going 50mph or more. Additionally, it would not creep correctly..the resistance from the wide tires was too much.

Switched to 33x10.5 and love it. Best change I have made to my rig so far.

 

I’m using 33-12.5-17. Great on the sand and street.

 

Another vote for 10.5 x 33 x 15. Took the off wheels and tires my LJ. Put on some 1.25 adapters. Love the look and ride. Now need to convince wife I need to replace the KM's.

 

I run 34X11.5 (285/75R17). I wanted to get the BFG 34X10.50 tire but it ran too small.

 

I like the 15" wheel and tire combo as well.


Here is more information on the 15" on JK's. https://www.wranglerforum.com/f27/15-mb72-fits-jk-67738-2.html


Here is a comparable wheel to my MB72 wheels. They look to have the same backspace. But you would have to get more confirmation as to caliper clearances. https://www.discounttiredirect.com/buy-wheels/mb-wheels-razor/p/16202

or these: https://www.customwheeloffset.com/buy-wheel-offset/PCW51-5885/pro-comp-series-51-15x8-51-custom-wheels?bolt_patterns=5x5.5%2C5x139.7&&staggered=PCW51-5885R2+5


or: https://www.summitracing.com/parts/..._-srese1-_-Cragar&gclid=EAIaIQobChMInrTOhKey3gIVAdbACh1JWgf8EAYYASABEgLnSPD_BwE



These may work as well. https://www.walmart.com/ip/15-Inch-...373&wl13=&veh=sem&gclid=EAIaIQobChMInvKC2OSv3gIVzMDACh3VqAhwEAQYBCABEgLL6PD_BwE



Here is my 12' Sport on BFG KO 32x11.5-15 on MB72 15x8 wheels.

 

Ideally I am going for the same look that you have there and I like the BFG All terrain T/A KO2's, but don't know if I would be sacrificing any capability because mine has the BFG M/T KM's right now and they have handled everything. I do mostly street driving because mine is my DD right now but want something to handle everything from sand to mud to trails as I plan to make a trip to Colorado next summer.

 

Ive been running 33x12.5R15 Cooper STTs since my JK was new. I dont remember if my spacers are 1.25 or 1.5. No issues on pavement, dirt, mud, snow and ice. Only reason I have the 15s are because I wanted to.

Ran the same size on my old ZJ for 8 years.

 

IMO...the BFG's are great on sand and dry snow and do well in rain but I've had issues with them packing in mud...they almost become like drag slicks and will not clear themselves. The mud here is gummy red clay which is slick as snot on a doorknob. They did run very smooth with even wear across the tread. I ran 325-60-20's on my 2500HD. Have Toyos now and love them! A bit noisy but they will pull the fire out of hell.

 

I would say my main offroading would be sand and trails as I mainly plan trips to the sand dunes in Michigan or the rocky trails in Colorado and then we have whatever snow happens to blow through Missouri. Until my jeep isn't my DD anymore, I don't plan to do anything crazy offroad with it.

 

My main thought though is, will I really notice that much of a difference before I go through with all of the work involved and cost. The new tires would have more sidewall and be 1" tall and a half inch wider if I go with 33x10.5 tires. I still would have to deal with the TPMS and getting a recalibrating tool for the tire size change so those added expenses get included as well. I will add some pictures of what my current set up looks like.

 

Im really happy with my setup, Ill have to get new pics up later.

Mine came with P225/75R16 about 29"X9" so my 33x12.5 measure about 32 so 3" taller then stock. I had been running the same tires for years on my last Jeep so swapping them over to the 14 JK was a no brainers to me and worth the cost. That and the stock rims and rubber just looked silly to me.

 

See that is a much bigger difference though, mine currently are the 255/75R17 BFG M/T KM's (32" x 10") and I do really like the stock Willy's Wheeler rims but they are too big I feel and I'd like to see more tire.

 

It's well worth it f you are not in a hurry to replace the current set.

I picked up five Kuhmo MT51 tires on sale for $125 ea and the rims on closeout from Discount Tire Direct for $60 ea. DTD even gave me free lifetime rotation and balance ( I love DTD!)

Total out of pocket , including mount and balance was about $1000 IIRC

It's Black Friday and Christmas is right around the corner. Just shop around and take your time.




33x12.50R15s and no lift

 

In a word, no. There is no reason to go down to 15's. Also, if your main offroading is on sand it's universally agreed that wide, all terrain tires work great in sand.

 

The "baby" got new shoes this week...33-12.5-15's.

 

Bassett makes a variety of wheels that should fit and can be ordered with different offsets.

There are beadlock and have optional mud covers: Bassett 15" Diameter D-Hole Lightweight Racing Wheels Asphalt or Dirt

They are avaiable in 15x8, 15x10, an wider

In 15x8 there are these conventional DOT-approved wheels, again in a choice of offsets:

These are from Diamond Racing Wheels, again different offsets and widths: