Free Shipping on Orders Over $75. Details

Talk to Wrangler Enthusiasts
M-F 8:30A-11P, Sat-Sun 8:30A-9P
$4,500 Giveaway! 3 Winners Enter Now

Mammoth Boulder Charcoal 17x9 Wheel and BF Goodrich KM2 35x12.50R17 Tire Kit (07-18 Jeep Wrangler JK)

Item J102100
Market Price $2,137.87 You Save 7% ($153.95)
Starting At


+ $80.00 Handling Fee with FREE Shipping

Select Quantity

Set of 4 Set of 5

Item Options

Ship to: Ashburn - 20149
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
Choose options to add to cart.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    Features, Video & Details

    • (4) 17x9 Charcoal Mammoth 4x4 Boulder
    • (4) 35x12.50R17LT BF Goodrich Mud-Terrain T/A KM2
    • Mounting & Balancing Available
    • Free Nitrogen Fill
    • Optional 5th Wheel Available
    • Fits 2007-2018 Jeep Wrangler JK Models
    • Road Hazard Protection Plan Available

    Review & Installation Video

    Review & Install Video

    I'm Ryan from and this is my review of the Mammoth Boulder Wheel and Tire Kit, fitting all 1987 to 2016 Wranglers. This kit is available in both 16 and 17 inch wheels and in black, silver and charcoal finishes. Wheel and tire kits are for those of you looking to upgrade the wheels and tires on your JK and you want to do them at the same time. Generally going to a larger tire will mean a new wheel because you'll need a different width, diameter or backspacing, so doing them at the same time in a wheel and tire kit makes things really easy. So if you're looking to upgrade to larger wheels and tires on your Jeep, or if you're just looking to replace the worn out rubber you already have, I definitely recommend taking a look at the Mammoth wheel and tire kits. What I really like about the wheel and tire kits is that everything comes to you mounted, balanced and ready to bolt onto your Jeep all without you having to take a trip to the tire store. So let's talk about this wheel. The Mammoth Boulder is a five spoke aluminum wheel. It looks really nice and it's available in a couple of different sizes. You can get this in both 16 X 8 or 17 X 9 inch, depending on what size tires you want to run on your Jeep. And the wheel is available in three different finishes. You can get black, charcoal or silver, so there's a finish that will look great with your Jeep no matter what color it is.Running a slightly smaller wheel has some benefits, especially for you guys who take your Jeep off road. The smaller 16 inch wheel will have more sidewall than the larger 17 inch, which is great for gripping rocks and different obstacles off road, and the narrower 8 inch wheel will give you natural sidewall pressure so when you air down to a lower PSI when off road, you don't risk losing a beat. But if you like the look of the 17 inch wheel, those are definitely available as well. Maybe more important than the diameter and the width of the wheel is the backspacing, especially for a Jeep. When you are running a larger and wider wheel and tire, there's always the chance that the tire is going to contact either the frame or the control arm when you turn the steering wheel from lock to lock. Having a smaller amount of backspacing will push the wheel and tire package away from the center line of the Jeep giving you the clearance that you need. These Boulder wheels have four and a half inches of backspacing. That gives you enough clearance to run most normal size tires that you'd want to put on your JK. Aside from dimensions, Mammoth made these wheels hub centric, which means that the weight of the vehicle is supported by the center hub and not by the lugs and they're a five by five lug pattern so they'll bolt directly onto your Jeep without the need for adapters. Once you decide what wheel you like, you have a few different brand, styles and size tires to choose from. After you pick that package, you have a few more decisions to make. You will decide whether you want four or a full set of five wheels and tires including the spare, whether you want TPMS sensors in the wheels and tires which will retain all of the factory TPMS system operation, and you'll decide whether you want the white lettering in the tires in or out. No matter how you decide to customize your kit, the tires will be filled with nitrogen which gives you more consistent tire pressure reading regardless of temperature and doesn't bleed through the rubber as much which means you won't have to refill them as often. And the best part about the wheel and tire kits is that they're mounted and balanced for free. So they get to your house, you pull them out of the box and bolt them on the Jeep, all saving you a trip to the mount and balance shop. Because these ship completely assembled, installation could not be any easier. The first thing you'll do is break loose your lug nuts, then jack up the Jeep making sure that you support it with a jack stand for safety. After that, you can remove the lug nuts and get the old wheels and tires off and put the new ones in place. You'll want to use a torque wrench when tightening the new lug nuts and tighten them to factory torque spec to make sure that you don't stretch the threads on the lugs and causing damage. The whole installation should take about an hour and you won't need any specialty tools, just a jack, a jack stand and the proper size socket wrench.So, if you're looking for a new set of wheels for your Jeep, I definitely recommend taking a look at the Mammoth Boulder wheel. They're a really strong, good looking wheel that come in a variety of sizes and finishes, and if you're also looking for new tires, a wheel and tire package is definitely the way to go. You might be able to get tires from here and wheels from here and take them all to a mount and balance shop and save a few dollars, but for the convenience and the customization of a wheel and tire kit, I think you get a ton of value for the price you pay. So that's my review of the Mammoth Boulder Wheel and Tire Kit, fitting all 1987 to 2016 Wranglers that you can find right here at

    Easy "One Click" Shopping. This wheel and tire combo kit features (4)17x9 Charcoal Mammoth 4x4 Boulder wheels and (4) BF Goodrich Mud-Terrain T/A KM2 35x12.50R17LT tires that have been put together into an easy "one click" to buy combo kit. An optional (5) wheel and tire kit is also available, see drop down option above.

    Recommended 5th Wheel Upgrade. When increasing the rolling diameter of your Jeep Wranglers tires it is recommended to upgrade your spare tire at the same time as the stock spare may be too small to be used. And besides a big meaty spare looks intimidating on the back of your Wrangler.

    Charcoal Mammoth 4x4 Boulder. Upgrade your Jeep with the Mammoth 4x4 Boulder Charcoal Wheel from ExtremeTerrain. This Mammoth 4x4 wheel features classic Wrangler styling with an aggressive flare made to take on the outdoors. It's hub centric design provides the reliability you need on the highway and trail for a bold look no matter where your tire tracks end. Completed in a durable charcoal powder coat for a rugged off road appearance, this Mammoth 4x4 wheel is the perfect addition for the Jeeper looking for a custom styled wheel without a daunting price tag.  It comes complete with a matching Mammoth 4x4 center cap for complete aggressive styling whether you're on the trail or cruising the highway.

    35x12.50R17LT BF Goodrich Mud-Terrain T/A KM2. BF Goodrich Mud Terrain T/A KM2 is the end all in off road capability. You'll never doubt traction on the trail with this tire's aggressive side wall lugs and self cleaning dual compound tread design. Your Wrangler will conquer climbs and pits and any obstacle with BF Goodrich's linear flex zone which allows this tire to conform to obstacles and grab the trail during aired-down crawling and driving. TriGard 3-ply construction and a chip resistant compound protect this tire from any trail hazards you run into, including cuts from rocks or boulders.

    How do I keep my TPMS feature? The Tire Pressure Monitoring System is a safety feature on all 2007+ Jeep Wranglers that alerts you when your tire pressure drops to an unsafe limit. Aftermarket wheels do not have TPMS sensors. However, if you select 'Add TPMS Sensor Kit' for your specific year from the options listed above, we'll install the sensors in your new wheels for free!

    Application. This 17x9 Charcoal Mammoth 4x4 Boulder wheel and 35x12.50R17LT BF Goodrich Mud-Terrain T/A KM2 Fits 2007-2018 JK Jeep Wranglers.

    Mammoth 4x4

    Fitment: 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 Details

    Mounting & Balancing ExtremeTerrain offers professional mounting and balancing on all wheels and tires when purchased together on the same order. This will allow you to swap out your old wheels for your new set when they arrive.

    • State of the Art On-Site Tire Facility
    • Scratch Free Mounting Process
    • Environmentally Friendly, Lead Free Wheel Weights
    • Free Installation of TPMS Sensors When Purchased on the Same Order (2007+ Jeep Wranglers)
    • 1 to 2 Business Day Turn Around Time on Most Orders

    What is TPMS?The Tire Pressure Monitoring System (TPMS for short) is a factory installed safety feature on all 2007 and newer Jeep Wranglers that alerts you when your tire pressure drops to an unsafe limit.

    How do I keep my TPMS feature?Aftermarket wheels do not come with TPMS sensors. However, if you select 'Add TPMS Sensor’ and your specific year range from the options listed above, we'll install the TPMS Sensors in your new wheels!

    • Save Money! We sell TPMS Sensors and Sensor Kits at a fraction of the price of dealerships
    • Free Installation of TPMS Sensors When Purchased on the Same Wheel and Tire Order
    • Stay Safe - Keeps your Factory Safety Feature Intact
    • No More Warning Light - Lose the annoying dash light that appears when your sensors are missing

    For more Information, check out TPMS Sensor Kits in detail.

    MPN# J102100-A


    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (4) Wheels
    • (4) Center Caps
    • (4) Tires
    Installation Info
    Tech Specs

    Wheel Specifications:

    Manufacturer:Mammoth 4x4Style:Boulder
    Backspacing:4.7" (121mm)Offset:-6mm (-0.2")
    Load Capacity:1521 lbs (690 kg)Bolt Pattern:5x5"
    Weight:22.1 lbsMaterial:Aluminum

    Tire Specifications:

    Manufacturer:BF GoodrichStyle:Mud-Terrain T/A KM2
    Size:35x12.50R17LT / 318/72/17Tread Type:Mud Terrain
    Sidewall Color:Optional Black or WhiteMax Load:3000 lbs
    Weight:66.8 lbsTread Depth in 32nds:20

      Customer Photos

        Questions & Answers (24)

        5 Top Rated Questions

        Will P255/R75/17 tires fit on this wheel?

        • Hello, yes, you will be able to install your P255/75 R17 Tires on these wheels.

        Helpful (12)

        Do you have charcoal touch up paint available for the Mammoth Boulder wheels?

        • At this time we do not offer touch up paint for any of our wheels.

        Helpful (3)

        Planning on putting a Teraflex Sport ST1 1.5" Suspension Lift on my 2016 Sport S with 17x9 Mammoth wheels 295/70 R17 tires. My question is will this change the backspacing and offset to a point it will have a negative effect on the handling/drive-ability of the vehicle?

        • These wheels are pushed out further to provide a greater level of stability on a lifted Wrangler. If you lifted the Wrangler without going with aftermarket wheels, you'd feel a lot more top-heavy on turns.

        Helpful (2)

        How much does the 17x9 wheel weigh?

        • The 17x9 wheel weighs 26 pounds.

        Helpful (2)

        Will this fit a 33” tire? 305/65/17?

        • Yes, a 305/65R17 will fit on this 17x9 wheel.

        Helpful (1)
        10 More Questions
        Can I run 35x12.5x17 tires on this wheel without wheel spacers and with a 2.5" RC lift? 1 answer
        Can I run 35x12.5x17 tires on this wheel with a 2.5" RC lift? 1 answer
        The wheels are listed as hub-centric. But in one of the answers calls for a hub-centric wheel spacer for use with stock lug nuts. Just for good measure can you give us the hub diameter of this wheel, please? For JKs, the axle diameter is 71.5mm, so hub diameter has to match that width to be hub-centric. 1 answer
        What lug nuts do you need for these wheels? And, since they are hub-centric, does that matter when considering options for Wheel Spacers? 1 answer
        what is the back spacing and offset? my factory wheel is Factory wheel = 17x7.5" with 44.45 offset (6.1" backspace) with a 11” wide tire. I want to move up to a 12.5 tire and need clearance. Jeep says 35”x12.5 tire will clear with less back spacing. Looking for 5 to 4.5 1 answer
        What is the backspacing and offset of this wheel? 1 answer
        I have a 2016 Sport S with a TeraFlex S/T1 Suspension System. Will mammoth 17 X 9 wrapped in 295/70/r17 fit or will I need to use wheel spacers? Height wise it measures out to work, just not sure with the width and offset backspacing. Any thoughts appreciated first build. 1 answer
        What wheel lug nuts would match with this rim? Any suggestions? 1 answer
        Will these (17x9) fit with a P285/70/R17 tire on the OEM spare tire mount? 1 answer
        Hi, do I receive the necessary documents with this wheel? In Germany I need confirmation of Impact test, Bending test, Capacity Roll test / circulation test for technical acceptance? 1 answer

          Customer Reviews (74) Write a Review

          Ratings Summary

          4.9 out of 5 overall rating from 74 customers

          • October 07, 2019

            5 2009 Wrangler - DonaldH

            Best Bang for your Buck!!

            I absolutely love these wheels! I thought I was just kind of going on the cheap for a decent looking wheel, but they are awesome! I couldn’t tell you how many compliments I get on these wheels, and they look incredible. The pictures don’t do them justice! You won’t be sorry if you decide to install them on your Jeep!!

            Helpful (1)
          • September 29, 2019

            5 2018 Wrangler - JBH

            Great wheels

            I was hesitant on purchasing these wheels at first. I took a couple of weeks to make the decision on purchasing them. I wish I had not waited because these wheels look great in person. The color looks real nice on my white jeep.

            Helpful (1)
          • August 02, 2019

            5 2015 Wrangler - jws

            i'm a fan.

            solid construction, fast delivery time, and a very cool (non-black) look. i wanted something a little different, as everyone here has black wheels, and i've been very pleased with the overall performance and style of this rim. highly recommended.

            Helpful (1)
          • August 01, 2019

            5 2019 Rubicon - JoeT

            17x9 Mammoth Wheel

            Awesome wheel love the look and at a great price point.

            Helpful (1)
          • July 08, 2019

            5 2018 Wrangler - Edp

            Mamouth boulder

            Nice finish and matches my granite Crystal exterior perfectly

            Helpful (2)
          • April 11, 2019

            5 2016 Wrangler - Coulton


            This picture doesn’t give the wheels justice, these wheels are really cool and look great on my black wrangler.

            Helpful (1)
          • April 08, 2019

            5 2015 Wrangler - TMO76

            Mammoth Charcoal... A

            Extreme Terrain did great. Fast shipping. The wheels themselves are top notch. If you're on the fence go for it. Will not be disappointed. Thanks

            Helpful (2)
          • February 04, 2019

            5 2015 Rubicon - TLogan

            Mammoth Boulder 17x9

            This product is awesome. Absolutely what I expected. Shipping was fast and the product is just amazing. Very clean and just perfect. These rims give my Jeep the best look and it’s what I was looking for.

            Helpful (3)
          • January 24, 2019

            5 2013 Wrangler - PatM

            Excellent quality

            Very happy with my purchase. Offset is perfect for putting the wheels and tires at the edge of the wheel well.

            Helpful (6)
          • January 08, 2019

            5 2016 Wrangler - DavidA

            Awesome wheels

            Wheels just look great especially with the Nitto Ridge tires

            Helpful (5)
          • November 22, 2018

            5 2017 Wrangler - PaulT

            Thorough review

            I have a 2017 Sahara unlimited wrangler 4door. Products made it within a reasonable amount of time. Had to call to get my order to go through but probably do to who I was banking with so everything went great there and because I had ordered a couple thousand dollars of stuff I got about 200.00 off the overall purchase which I thought was thoughtful. I got four steel braided rear brake lines instead of two front and two rear but could of been my fault there so will be looking into that but they were very good quality. Overall very happy with the products. Only thing I will say is that the amount of time it took me to install it was about two hours longer than they had said but most likely because I didn’t have a car lift which would of made it way easier. That being said I got a rough country 2.5” lift without coils but came with the shocks and other hardware. Still braided lines and got 33” tires and new rims with TPMS sensors. Once I got them all to the right pressure I wanted it took about a mile before my ECU in the Jeep read them and everything worked fine so no going back to a shop to get them programmed. So worth it to have them do the sensors for the 60.00. I also had to drill one hole so be ready with a drill and I believe a 3/8 drill bit.. (can’t remember the size exactly). But it was easy enough. So if any of you read this and doing it yourself I would suggest getting some bigger jack stands (bigger than 6 ton) because of how far the axles drop. This will make it ten times easier when getting the coils out. And lastly probably a good idea to get some coil compressors (not sure that’s what they are called) because they helped me out when I couldn’t get the axles to drop all the way. Took me 6 hours to do all of it and it rides great and looks even better!!! Hope this helps everyone. Thanks for reading. Oh and it’s Thanksgiving today so Happy thanksgiving everyone!

            Helpful (9)
          • November 22, 2018

            5 2018 Wrangler - MichaelK

            Grear wheels.

            Love these wheels. Theynlook amazing on my Jeep. And the ride is excellent.

            Helpful (7)
          • November 20, 2018

            5 2009 Wrangler - WilliamM

            Great jeep look

            These are a great looking wheel. They made a big difference in not only the look but the weight compared to the 20" Wheels I removed was very noticeable.

            Helpful (7)
          • November 19, 2018

            5 2015 Wrangler - DanN

            Great Wheel, Great Price

            In my search for a clean look for my Jeep at an affordable price tag I came across these wheels. The finish is not perfect if you look close, but from normal viewing distance they look great. The clean 5 spoke design looks great on the Wranglers and the Charcoal color looks perfect against my Orange JKU. I paired these with 285/75/17 RG's and a 2.5" JKS Jspec lift for a capable daily driver. I am very happy with these wheels and highly recommend Extreme Terrain.

            Helpful (7)
          • November 18, 2018

            5 2007 Wrangler - Titan

            Solid wheel

            Loving the new wheel. Wanted something a bit different and the charcoal color fit the bill. Shipping was super quick as always.

            Helpful (7)
          • November 11, 2018

            5 2011 Wrangler - SteveA

            Right look

            2" lift, 315/70R17 tires, backspacing and offset are a perfect fit.

            Helpful (7)
          • November 06, 2018

            5 2017 Wrangler - DawnA

            great looking wheels.

            These look great on my Jeep jk. I added new more aggressive looking tires as well.

            Helpful (7)
          • September 24, 2018

            4 2015 Wrangler - ThomasF

            Nice upgrade

            Nice upgrade over the stock wheels. Better stance as it allowed bigger tires.

            Helpful (5)
          • September 13, 2018

            5 2014 Wrangler - Danielle

            Nice and basic rims.

            They’re pretty simple look really nice thou. I wanted a little different but also something I wouldn’t have to worry about.

            Helpful (5)
          • August 15, 2018

            5 2016 Wrangler - TimD

            Even better in person

            I hesitated to buy these wheels because I thought they were plain looking. I'm so happy I did get them anyway! They're simple, but not plain and look way better in person and on the jeep.

            Helpful (5)

          Related Wrangler Categories