Pro Comp Xtreme Mud Terrain Tires
& Pro Comp Series 8179 Black Powder Coat Wheels

To begin Phase-1 of my Project-JK build up, I set out to get my Jeep JK Wrangler Rubicon Unlimited lifted tall enough to clear 35″ tires and to be able to do it on a really tight budget.  And, while I was able to accomplish the lift I needed with a TeraFlex 2.5″ Budget Boost, I found it hard to compromise on what kind of wheels and tires I should run.  After all, a good set of tires play a huge part in how well your Jeep will perform on the trail and for me personally, I have always been of the mindset that it makes more sense to buy a set of good tires I know I can trust than to buy a set that might be more affordable but will end up leaving me sitting high and dry when I really need them the most.  And, to complicate things even more, it would seem that finding a decent set of wheels and tires that will actually fit the JK’s odd 5×5 bolt pattern hasn’t exactly been the easiest thing to do especially since they are in such high demand right now and supplies are so limited.

Anyway, with just a couple of weeks left before the 2007 Moab Easter Jeep Safari, I needed to get some new tires and I needed to get them fast.  So, I decided to make a few calls to my sponsoring vendors to see if anyone could help me out and as luck would have it, 4 Wheel Drive Hardware was able to come to my rescue.  The only catch was, the only tires they had available in the size I wanted was the brand new Pro Comp Xtreme Mud Terrains.  And, being such a new tire that hasn’t had much if any real testing on the trail or otherwise, I have to admit that I was a bit reluctant to go with these at first.  But after examining its tread design and doing a bit of reading on all its features, I decided someones got to give them a real test sooner or later and it might as well be me.  Need I say, with just a few days to spare, 4 Wheel Drive Hardware shipped over a complete set of five 315/70R17 Pro Comp Xtreme Mud Terrain Tires mounted and balanced on a set of great looking 17×9 Pro Comp Series 8179 Black Powder Coat Wheels that have 4.75″ of back spacing.

So, how have the Pro Comp Xtreme Mud Terrains been performing? Well, I can tell you that since I got them about a month ago, I have racked up about 3,000 miles on the odometer with a good 1,500 miles of that being put on driving out to Moab, Utah and wheeling the hell of the them there.  And, I’d have to say that I’m pleasantly surprised as to how much I really like these tires!  Although they do tend to sing a bit louder at highway speeds than did the factory BFGoodrich Mud Terrains I was running before, it really isn’t by much and I suppose some of it could just be from the tires being larger in size.  But, unlike the BFGoodrich M/T’s, the Pro Comp Xtreme Mud Terrains have a tread design that includes sipping on its lugs and I have found them to offer much better traction on wet/slippery roads.  On the trail, I found that the sticky rubber compound used in the construction of this tire provided superior grip on the slick rocks of Moab and helped make my JK to conquer just about every obstical that I could throw at it.

As far as tire wear goes, I am currently running my 315/70R17 Pro Comp Xtreme Mud Terrains at about 26 PSI which I have found to provide a good footprint that allows them to wear nice and evenly.  In fact, in the 3,000 miles that I have put on them, I have actually seen very little signs of wear unlike I have seen in the same amount of time on other tires I have run in the past.  At this rate, I would hope to see at least 40,000 miles of usable life out of them and most likely even more than that.  And at about $250 a piece, every mile you can get out of a tire makes it that much more of a value.

Now, in all fairness, I will have to say that I did loose one tire while I was in Moab and that was only because I needed to back my JK off the trail a bit to let some other Jeeps pass and in doing so, I ended up lancing one of my sidewalls on a short hard and dry 1/2″ thick tree branch sticking out of the ground (yes, I am kicking myself for not opting to get the optional Road Hazzard warranty).  And, to be quite honest, I’m not sure if any tire short of a super thick bias ply tire would have been able to resist being puntured as well.  Fortunately for me, Jeff from Superior Axle & Gear and Tim from Motive Gear both jumped in to help me to get the tire changed quickly and David from Northridge4x4 was able to succesfully patch it up with a Safety Seal Tire Repair Kit allowing me to still use it as a viable trail spare until I could get it replaced (NOTE: A sidewall plug is by no means safe and should not be used for on-road/highway use).

Without a doubt, I will have to revisit this review once I’ve put on a substantially greater amount of miles on these tires to know for sure what the long term effect really is.  But for now, if you were to ask me if I would recommend these tires to you, I would have to give them a resounding YES!

Click here to see more Pro Comp Xtreme Mud Terrian and Series 8179 Wheel Pics


Special Thanks:  Again, I would like to thank 4 Wheel Drive Hardware for all their help and support.  If you’re looking for a set of wheels and tires for your Jeep JK Wrangler, these guys have one of the biggest selections to choose from.


  1. I have a 2010 Sport 2dr with a base set of tires. I’ve been cruising the forums looking for answers for a conservative tire/wheel upgrade. I don’t need 35+ tires. I’m just looking to find out the largest tire upgrade I can get without doing any lifts, cutting, or having them rub.

    Also, are there any other considerations I should be aware of before making a purchase?

    If anyone can explain the effects of gear ratio, and best way to shop for tires to avoid regrets, that would be helpful!

    Thanks for keeping this post up!

  2. 32″ is the biggest you can go without any doing anything. 33″ can be done but you will most likely see some minor rubbing depending on the make of the tire you get. so long as you stick with a 32 or 33″ tires, you will not need to regear.

  3. Am thinking of ugrading to 35’s, and I have been told that I need to upgrade the gearing to 4.88’s, or 5.13’s. I have an 07 Unlimited X. However I live on an Island, that is primarily flat, and rarely exceed 40 mph, is my performance going to be effected that much that I need to change out the gearing, or will it be liveable? I want to do it anyway, but am trying to manage the budget. Thanks for any input, great website by the way.

  4. In Egypt Wranglers Unlimited are being assembled goona get one soon they have R17 Rims with 255/75 stock tires, planning to put on Original Rim R17 BFG Mud terrains KO2 size 305/65R17 i drive 80 % to work & occasional trips to dunes, I know 1.5 wheel spacer is a must, the reason for wide tires want to look different then other Wranglers will i need a TF 2.5 budget lift??? and tire rubbing will be there?? They are priced 43K$ we have huge duty taxes

  5. I am planning on running 33″ pro comp xtreme m/t on a 16″ rim. I have a 2″ OME lift, would a backspacing of 4″ stick out very far? What backspacing would you recommend? Thanks

  6. with 12.50″ wide tires, the minimum amount of back spacing you should run is 4.5″. needless to say, your tires will stick out about a 1/2″ more than the bare minimum.

  7. I am running a 2007 Sahara Unlimited. I was wanting to know what is the better lift for ride quality between the TeraFlex BB, TeraFlex 2.5″ suspension lift, or 3″ TeraFlex suspension lift. This is my daily driver. I also will be running 18×9 black XD 778 wheels and would like to know what size tire would look and handle the best? Tires I’ve been looking at are Nitto Mud Grappler, BFG KM2, Mickey Thompson MTZ, Procomp XTreme M/T. This Jeep is more for show and very little off-roading.

  8. I have a 2010 JK, 2 door, 6 speed with 3:73 gearing. The jeep is used mainly as a DD but would like to put on some larger tires 33 – 35″. Taking fuel econemy and center of gravity into consideration which is more practical: 2.5″ BB w/ 35″ tires or install bushwacker flat fenders w/ 33″ tires. Regearing is out of the question. Also, will modifying air intake and exhaust compensate for the larger tires?

  9. andy, for your purposes, i would recommend just installing a BB. that would give you what you need to run a set of 305’s

    steve, if you’re even thinking about it, i would recommend getting 35’s. you should be able to run them with just the bushwacker fenders.

  10. What is the largest tire you can get under a stock 2008 jk rubicon umlimited? I am not wanting to do a lift kit and want to keep it stock b/c it is a daily driver and I need to fit into garages. I am looking to get the right tire and wheel combo (not stock wheels) that gives me a big aggressivee look.

  11. I have a 2010 unlimited Rubicon.
    Id like a 4.5 lift and 35″x 12.5x 17 tires.It will be a daily driver with only limited time in sand or mud.Is my driveshaft going to hit my transmission pan? Is a 3.5 lift more suitable for 35″ tires? My installer recommends 4.88 gears and wants $2200 to install them(front and rear). Does that sound right?


  12. if you’re only going to be running 35’s, a 3.5″ lift would be the better way to go. 4.5″ will be way too tall for 35’s and will require a lot more components and money to keep it driving nice on pavement. regarding gears, $2200 sounds a bit high to me but, it may be the going rate in your area. here in southern california, you can get gears installed for about $1500.

  13. Lets try this. I have a 2008 wrangler unlimited x. I have a 4 inch skyjacker short arm lift with LOD front and rear bumpers. I also have winch and rock sliders and a few other items that have added much weight to the vehicle. I also have bushwacker flat fenders and am running toyo 37 inch tires mounted on poison spyder beadlock wheels. I’m sure that I’ve lost some of the lift and with minimum flex my tires are rubbing on the front bumper and extermely close to the front side of the rear wheel well. I’m considering putting ACOS coil spring adjusters front and rear to give me back to the original lift and then some. I’m hoping that will eliminate the rubbing issue. Actually digging into the edge of the front bumper. I’m worried that by lifting the vehicle further will create more problems in other places and I’m hoping you can tell me what other problems I could expect to pop up if I were install the ACOS coil spring adjusters. I love how my jeep looks as it is very unique for hawaii. It runs fine on road but want to get back off road without spending too much. Can you please advise me?

    Thanks, Kevin

  14. I had a 2003 Wrangler and lifted it 4″s and put just 33 X 12.50 Fun Country tires on it. It changed the ride to the point that my wife would not drive it. It rode terrible, it drove terrible (when you hit a small bump in the road the steering wheel would move several inches in your hand)and I should have changed the gearing or something because it would not stay at 60 mph without jumping back and forth from drive to overdrive, but it looked good. With that said, I resently bought a 2010 JK (4-door)and now I want to lift it some. I was thinking about installing 305 70R 17 tires. If I go with this look, what lift if any do I need, and most of all is it going to change the current characteristics of the Jeep a lot.

  15. first off, the JK is no 2003 TJ. also, 4″ of lift on a TJ is a lot of lift especially if you weren’t running long arms and a terrible ride should have been expected. having said that, to clear 305’s on a JK, all you really need is about 2.5″ of lift and i would recommend a basic budget boost like the kind teraflex makes. your ride will not be compromised. also, another option would be to install high clearance fenders like the kind bushwacker makes. with these, you can pretty much run 305’s without any lift.

  16. I have a 2010 JK Rubicon unlimited with 2″ MOPAR lift,XHD front bumper,Tigerz 11 2 speed 12000lbs winch and running a 1″ body lift.I want to fit 35×12.5×17 KM2s on my stock rims with Alloy USA wheel spacers.What tire pressures should i run and i want to re gear at a later stage,which is better 4.88 or 5.13?
    cheers… ROCKY

  17. every tire is a little different but, i would recommend starting at about 28-30 psi. also, with 35’s, i would recommend running 5.13’s. your rpm’s will be on the high side at highway speeds but, the boost in power is worth it.

  18. Hi, I have a question….I have a 2010 JK Sports 2DR and I want it looks aggressive….I want to change the WHEELS & TIRES…without any lifting or putting a spacer on it…I dont want to go higher that 17 inch. wheels also…Now, what do you recommend on what size of wheels and tires will I buy….and also the BB of the wheels….without causing any rubbing…I`m not doing any off-roading…Thanks

  19. if you want an agressive looking tire, you will want a mud terrain like these, BFG MT’s, goodyear MT/R’s or toyo MT’s. as far as size goes, if you don’t want to do a lift, you’ll want to stick with a 33″ tire. as far as the wheel goes, you’ll want it to have 4.5″ of back spacing.

  20. sir…I called the 4WD accessories store and the CS guy told me that, if I`m going to get a wheels that is 17×8 with back spacing of 4.5″ and a tires of 33×12.50/17..still I will be experiencing some rubbing…is this true?

  21. HI, its me again….so, doing 17×8 with back spacing of 4.5″ and getting a tires that is 33×12.50/17 is not a good idea(without any lifting)…what is the right size(wheels and tires) should I get…(15 0r 16 wheels?)and what size tires should I you think any 12.50″ tires will still rub even I reduce my wheels into 15 or 16? I need your recommendation on what wheels and tires should I get without any problem with rubbing with aggressive looks and wider…but maintained the original height…THANKS

  22. yes, your problem is with the 12.50 width and not the wheel size. in the rear, you will be fine with 4.5″ of back spacing but at a full turn, you may see some rubbing.

  23. I have a 2007 Unlimited sport 2wd; 6 speed manual. I will not be off-roading. I just want a nice taller look and aggressive wheel/tires, but that will not stick out, or barely more than stock.
    1) My OEM tires are 30.5″ on 16 x 7. I was thinking of a 2.5 or 3″ lift and 33″ tires. What budget -yet quality- body or suspension lifts should I consider?
    2) If I go with 35′, do i have to regear? If I don’t, would be problem be severe loss of power and severe gas mileage drop?


  24. gus, for your purposes, i would just get a teraflex 2.5″ budget boost. so long as you don’t go off roading, you will be fine with this setup. with 35’s, you will feel some power loss but, it’s not too terrible. regearing to 4.88 will bring you back to about stock performance.

  25. new automatic 2011 jk with sport package daily driver mostly , although college son will be wanting to do some limited off \roading .. my concern aggressive look and stable so any of kids and wife can use it.. original thought was 3 inch bds lift with single steering stabilizer and adjustable track bars and shock upgrade , magna flow exhaust , and the k and n air intake , 17 inch x 9 wheels with 4,5 or so back spacing and 35 x 12.5 in duratrac tires , i would assume flashpaq for calibrating although did not see one out for 2011 yet question this is getting costly if i need to regear , do i need to regear ?? if i am willing to put in 5.10 gears and will this car be tougher to drive for the daily tasks or actually better? … if not good for daily stuff should i just get 33 inch tires and 16 inch wheels will it be making a diffrence for stability and save ton of dough, just worried it will become only my car if not stable feeling or losing the ride comfort

  26. Eddie, I have a 2010 JK unlimited with a 4″ ProComp lift and 5.13 gears, 35″ Dunlop Rover MT Maxx Tractions. I use the Jeep 30/70 off road to street. I started to hear a thud when i would turn to the left and decided to investigate. I jacked the jeep up slowly and found that the left rear coil spring is making the noise as it decompresses. Is this normal? Is there some sort of kit that locks the springs down? Right now I know it is just the spring releasing from the seat and then going back into place. Would you recommend a spring retention kit and if so do you know of one that will work with the procomp lift.

  27. does your kit have a track bar relocation bracket that’s attached to the axle end? if so, have you checked to see if your coil is making contact with the track bar bolt?

  28. Eddie, I am wanting to buy pro comp wheels and cant decide what to put on my 08 Sahara 4dr w/2.5BB and will run 35×12.50/17. Generally most of pro comps wheels that are 17X8 have 4.5BS and their 17X9 have 4.75BS. Even though 4.5BS sounds better at first… On paper it seem an inch wider wheel adds a 1/2″ of wheel to each side. Then shifting the wider wheel to 4.75BS actually reduces BS by a 1/4″. thoughts….?

  29. Hi. I currently have a stock 2010 4 door sahara 6 speed, and I have a few questions. I was wondering what size tires I can fit on it comfortably. I don’t do much wheeling, but every so often I take it to the beach or light trails. But that’s it really. Any suggestions? I have like 6 grand saved up for tires, wheels, and a lift. Thanks!

  30. Hi, I have a Sahara 2008 4 door. I love to change wheels and tires on it. I am sort of new to all this. What size do you recomend, with out having to change too many parts my budget is tight for this project.

  31. I have 2010 jku w/18in wheels I plan to change these for a17in pro comp with 4.5 bs or a dick cepek w/ 5in bs I also plan to run either a 275/70/17 or a 285/70/17 any thoughts on this would be greatly appreciated as I am a newb I would also like to run a 2inch or less bb or level kit but don’t know if I can get nerve to make the change to suspension any comment on what this would do to overall handeling and dynamics of jeep would also be helpful thanks.

  32. Hey Eddie,
    Thank you so much for all the time you put into helping people like me.
    I have an automatic 2 dr 07 Sahara stock. I dont do much offroading, cuz I dont have the time, but I really want to put 35’s on her. I love the Pro comp 8179 on your JK and was wondering if just the 2.5″ Teraflex BB will suffice? I will be doing littlle offroading, but definately more of a street jeep. Wha are the best looking tires that perform quietly and smoothly on the road? Im scared to commit without the proper info… I dont want to be adding more parts just to make it work. Please help me with any other mods that will be necessary(Sway bar, spacers…etc).
    Thank you so much.

  33. Eddie, I’ve got a 2012 Unlimited Rubicon on order (Auto w/ 4.10 gears)delivery is in 5 to 6 weeks. It will see 70/30 payment/offroad minimum. First, do you think the new transmission will run 35’s with stock 4.10 gears okay? Think I’d need to regear with 37″‘s IF I ever went that big? I’ve got gear set aside and want to know if I need to reconsider or supplement any of it. Your input and recommendations are much appreciated. Here is what I’m considering:
    ProComp 17×9 4.75bs with 315/70R17 ProComp MTR’s. I don’t want to chop it up too much yet and I’d like it to perform and drive smoothly on and off pavement so I’ve gotta get this right the first time! Lift is my main concern, I have the 3.5″ standard(w/plans to upgrade later)rubicon express kit set aside with ProComp MX6 monotube shocks, but I’m now considering dropping cash on the superflex kit that includes almost everything other than SYE/CV – what shocks do you recommend? I’m NOT set on Rubicon Express and would rather not scrap my tranny skid plate that the RE kit requires – Do you recommend another brand or size lift? Perhaps a Tereflex kit that you have faith in. I have access to Rough Country near cost, but haven’t heard many positive experiences with them. I’d rather not drop 2K plus on a lift right now but I will if need be – it should be functional offroad. Bitchin’ looks are always a bonus. No plans to modify fenders yet, but I do have aftermarket front and rear bumpers and a winch already waiting. Thanks for you help and your time.

  34. Preparing to put 4.10 gears – a 2.5 inch TeraFlex lift with lower front adjustable control arms, front and rear adjustable track bars- 285/75R17 Toyo Open Country Mud Terrains on Black Rock Intruder (17×8.5) 910S Wheels – all of this on a 2011 JK Sahara 4dr – Will use this vehicle for everyday use and to go on camping/hiking trips 3 or 4 times a year. Would this be a good setup for my wife to drive without any rubbing and being very stable for her. Off road during trips would be limited but want to be prepared if the need arises. Or could you suggest a better setup?

  35. Hey everyone. I am also looking to get a lift and larger tires. I own an 08 sahara unlimited. I want to goto a 35 inch to possibly even a 40 inch tire. One thing I noticed reading this thread is nobody seems to be mentioning what every 4×4 shop I have been to tells me. They say you cannot goto even a 35 inch tire without re-gearing your rig! Even the rubicon with its 4:10 gear ratio cant handel 35 inch tires I am told. I am told you need to re-gear to at least a 4:88 if not a 5:36. Then I hear the issue becomes the fact that these 3.8L V6 motors cant handel it if you are daily driving this vehicle. Overdrive is almost impossible to maintain I am told in the automatic. So I am curious because it sounds like alot of you are just throwing large tires on your stock wranglers after getting a lift without doing any front and rear diff changes….. IS WORKING OR AM I MISSING SOMETHING? Do you guys RE-GEAR OR NOT!?
    Thanks, your replies are valued.


  37. I have a 2009 Jk x model with 16in steel wheels. I like the wheels and want to just put on the largest tire that will fit. What do you think is the largest tire I can fit on the stock steel wheel? Thanks for your help!

  38. Eddie, I have a stock 09, 2dr, JK. My question is, I just purchased a set of 18in. Rock star rims that came with and a set of 275/70/18 Goodyear Duratrac tires. What size spacer do I need to keep the front from rubbing the frame when turning. Thanks.

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