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Mammoth Boulder Black Wheel - 17x9 and BFG KM2 Tire 265/70-17 (07-18 Jeep Wrangler JK)

ExtremeTerrain no longer carries the Mammoth Boulder Black Wheel - 17x9 and BFG KM2 Tire 265/70-17 (07-18 Jeep Wrangler JK). Please check out Jeep Wheel & Tire Kits for an updated selection.

Features, Video & Details

  • (4) 17x9 Matte Black Mammoth 4x4 Boulder
  • (4) LT265/70R17 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 ExtremeTerrain.com 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 ExtremeTerrain.com.

Easy "One Click" Shopping. This wheel and tire combo kit features (4)17x9 Matte Black Mammoth 4x4 Boulder wheels and (4) BF Goodrich Mud-Terrain T/A KM2 LT265/70R17 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 factory spare may be too small to be used. And besides a big meaty spare looks intimidating on the back of your Wrangler.

Matte Black Mammoth 4x4 Boulder. Upgrade your Jeep with the Mammoth 4x4 Boulder Black Wheel from ExtremeTerrain. This Mammoth 4x4 wheel features classic Wrangler styling with an aggressive spin made to take on the trail. Specific to your Wrangler, it features a hub centric design to provide the reliability you need on the highway or off the paved path for a bold look no matter where your tire tracks end. Completed in a durable matte black 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.

LT265/70R17 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 Matte Black Mammoth 4x4 Boulder wheel and LT265/70R17 BF Goodrich Mud-Terrain T/A KM2 Fits 2007-2018 JK Jeep Wranglers.

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 for an additional fee. 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+ 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 free of charge!

  • 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.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

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

Wheel Specifications:

Manufacturer: Mammoth 4x4 Style: Boulder
Size: 17x9 Finish: Matte Black
Backspacing: 4.7" (121mm) Offset: -6mm (-0.2")
Load Capacity: 1521 lbs (690 kg) Bolt Pattern: 5x5"
Weight: 23.0 lbs Material: Aluminum

Tire Specifications:

Manufacturer: BF Goodrich Style: Mud-Terrain T/A KM2
Size: LT265/70R17 / 32 in Tread Type: Mud Terrain
Sidewall Color: Optional Black or White Max Load: 3195 lbs
Weight: 55.9 lbs Tread Depth in 32nds: 18

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Questions & Answers (27)

5 Top Rated Questions

Will the stock JK lugnuts work on this wheel?

  • Hello, yes you can use the stock JK lug nuts on these wheels.

Helpful (6)

Will P285/70/R17 fit without rubbing anywhere at full flex with no lift or spacers?

  • Thank you for your question! A 285/70R17 is about 32.7" tall and about 11.2" wide. With this wheel you will have enough backspacing that you will not need spacers. At full flex with no lift I would not recommend an almost equivalent 33" tire because there will be interference with stock fenders.

Helpful (4)

would these fit a 2018 JL unlimited sport? 17X9 wheel thinking about 33" tires. what do you suggest??

  • Yes! These Mammoth Boulder Black Wheel will fit your 2018 JL just fine and should have no problem with 33" tires at stock ride height.

Helpful (1)

Hello. I am thinking of purchasing these wheels and new A/T tires for my stock 2010 Wrangler Sport (2-door). What is the largest recommended tire size that would fit without any rubbing considering I have all OEM parts (e.g., bumpers), and without adding a lift kit or other add-ons? And which tire do you recommend? Thanks,

  • We would suggest no larger than a 32x12.50 with the Mammoth Boulder Black Wheel - 17x9 on a stock Jeep. Two popular options for the all terrains is the BF Goodrich All-Terrain T/A KO2 and the NITTO Ridge Grappler Tire.

Helpful (1)

Do these include the pictured center cap? And would these be the proper offset for 35 inch tires on a 2.5 inch lift? Can factory TPMS be re used without issue?

  • These will indeed feature the pictured center caps. This would depend on the specific lift kit you have. Please reach out directly to our customer service department via our live chat feature, email at support@ExtremeTerrain.com, or by calling1-877-775-2161 we need to find some additional information about your vehicle before making a recommendation and would be glad to help assist you with this build!

Helpful (0)
Post Your Question
10 More Questions
Are the Mammoth wheels hub centric for the 2015 JK Willys Wheeler? I have a Dana 30 front axle. 1 answer
Are spacers need for 285/70/17 tires? 1 answer
Will the stock JL lugnuts work on this wheel? 1 answer
What is the finish on these wheels? Matt, Flat, or Satin? I am looking at these for a flat black look. 1 answer
Do I need to run spacers for these rims with a 3 in lift on an 09 jkur.? 1 answer
I am looking to get these in 17x9 to put 35 x 12.5 KO2's on my 2017 2door. I have the mopar 2" lift (Which nets 3" of lift over stock) will I have any clearance issues, or rubbing the frame/components on or off road with these wheels and tire combo? 1 answer
I believe these should be usable on the WJ Grand Cherokee, correct? The WJ is a 5x5 bolt pattern with a 71.5mm center bore, which I think is the same as the JK. 1 answer
Lugnuts do you recommend or require any special kind of lugnut and do you sell them? 1 answer
Lugnuts do you recommend or require any special kind of lugnu?t and do you sell them? 1 answer
Can you tell me the weight for each wheel. 1 answer

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Customer Reviews (100+) Write a Review

Overall Rating 4.9

out of 5 stars

  • Finish 4.808176 4.8
  • Appearance 4.949686 4.9
  • Quality 4.833333 4.8
  • Bang For Your Buck 4.893082 4.9



  • 5/5

    April 17, 2019

    Review from Mammoth Boulder Matte Black Wheel - 17x9 -06mm Offset (07-18 Jeep Wrangler JK)

    Totally Awesome

    2010 Wrangler 2 door Rubicon Black Wanted an all black look and these wheels fit the bill. Very well constructed.

    TomS

    Year: 2010Submodel: Rubicon

    Helpful (0)

  • 5/5

    April 08, 2019

    Review from Mammoth Boulder Matte Black Wheel - 17x9 -06mm Offset (07-18 Jeep Wrangler JK)

    Great!

    Really happy with these rims come in at a great price and look great on my jeep

    Sidewinder

    Year: 2007Submodel: Wrangler

    Helpful (0)

  • 5/5

    March 27, 2019

    Review from Mammoth Boulder Matte Black Wheel - 17x9 -06mm Offset (07-18 Jeep Wrangler JK)

    What a difference!!!

    I had my eye on these wheels for quite a while before I decided to pull the trigger. I liked the looks of this wheel and the fact that they were already properly offset made the decision that much easier. I am very pleased with this purchase and even more pleased at how much more appealing it made my Jeep look. The price was right and the shipping was fast. I Would highly recommend this wheel if you want to turn some heads.

    Bubby0129

    Year: 2013Submodel: Wrangler

    Helpful (1)

  • 5/5

    March 19, 2019

    Review from Mammoth Boulder Matte Black Wheel - 17x9 -06mm Offset (07-18 Jeep Wrangler JK)

    Look Fantastic

    These look fantastic on the 2018 Wrangler JK Unlimitef

    Goldmine

    Year: 2018Submodel: Wrangler

    Helpful (0)

  • 5/5

    March 18, 2019

    Review from Mammoth Boulder Matte Black Wheel - 17x9 -06mm Offset (07-18 Jeep Wrangler JK)

    Great

    Rims look great w/KO2's, My JK is all back i want to keep it all black

    RandyM

    Year: 2015Submodel: Wrangler

    Helpful (0)

  • 5/5

    March 18, 2019

    Review from Mammoth Boulder Matte Black Wheel - 17x9 -06mm Offset (07-18 Jeep Wrangler JK)

    Nice Wheels

    Very impressed as soon as I opened the package. These are a great addition to my 2018 wrangler. the only thing I forgot was to order the black lug nuts :) but have them on my list.

    winston64

    Year: 2018Submodel: Wrangler

    Helpful (0)

  • 5/5

    March 17, 2019

    Review from Mammoth Boulder Matte Black Wheel - 17x9 -06mm Offset (07-18 Jeep Wrangler JK)

    Great

    Fit great looks great price is good light weight there was an issue with the order but getting fixed so far

    AlbertS

    Year: 2017Submodel: Wrangler

    Helpful (0)

  • 5/5

    March 04, 2019

    Review from Mammoth Boulder Matte Black Wheel - 17x9 -06mm Offset (07-18 Jeep Wrangler JK)

    Great Wheels

    I saw these on a TJ locally and decided I had to have them for my JK. I love them! Exactly the look I wanted. The price is very fair for the quality and look.

    JimH

    Year: 2008Submodel: Wrangler

    Helpful (0)

  • 5/5

    March 01, 2019

    Review from Mammoth Boulder Matte Black Wheel - 17x9 -06mm Offset (07-18 Jeep Wrangler JK)

    Worthy upgrade

    I was looking for an inexpensive wheel to update the stock JK aluminum one. These fit the bill! They look great and have the perfect amount of offset so I was able to eliminate the 1.5 inch spacers I was running. Quality and finish got five stars for now but how they hold up long term is yet to be answered.

    Joejeep14

    Year: 2017Submodel: Wrangler

    Helpful (0)

  • 5/5

    February 13, 2019

    Review from Mammoth Boulder Matte Black Wheel - 17x9 -06mm Offset (07-18 Jeep Wrangler JK)

    Great aftermarket wheels

    The wheels look awesome , paired with 35in Mudclaws and couldn’t be happier with how my Jeep looks and rides.

    MikeW

    Year: 2018Submodel: Wrangler

    Helpful (2)

  • 5/5

    January 28, 2019

    Review from Mammoth Boulder Matte Black Wheel - 17x9 -06mm Offset (07-18 Jeep Wrangler JK)

    Nice wheels

    Real nice looking wheels for the money can’t wait to get them on

    Joec

    Year: 2018Submodel: Wrangler

    Helpful (3)

  • 3/5

    December 30, 2018

    Review from Mammoth Boulder Matte Black Wheel - 17x9 -06mm Offset (07-18 Jeep Wrangler JK)

    Good for the money

    Quality of the wheels finish is not very good - one of them had a long hair that had been painted onto the wheel. When removed, it took some of the paint with it and left lines of raised paint where it used to be. I didn't contact ET about this, as I didn't care enough to ship it back and wait for a new one... it became my 5th wheel spare. Paint seems "soft" - already have my first chip, with no exciting 4x4 story to tell for it - just normal road use. Now, aside from all this - I get compliments everywhere I go, and everyone agrees they look badass.

    TJ

    Year: 2011Submodel: Wrangler

    Helpful (5)

  • 5/5

    December 18, 2018

    Review from Mammoth Boulder Matte Black Wheel - 17x9 -06mm Offset (07-18 Jeep Wrangler JK)

    Great wheels for the price

    Just got super fast delivery. Very easy to put on. I love to look. Totally changed the factory Jeep look.

    DallasS

    Year: 2015Submodel: Wrangler

    Helpful (7)

  • 5/5

    December 16, 2018

    Review from Mammoth Boulder Matte Black Wheel - 17x9 -06mm Offset (07-18 Jeep Wrangler JK)

    Great Wheels

    I am from Alberta Canada, and made my first Extreme Terrain purchase with a set of 5 Mammoth Boulder Wheels. Very happy with the look, and fit, and finish of the wheels.

    Rayzor

    Year: 2015Submodel: Rubicon

    Helpful (7)

  • 5/5

    December 08, 2018

    Review from Mammoth Boulder Matte Black Wheel - 17x9 -06mm Offset (07-18 Jeep Wrangler JK)

    Aggressive

    I picked the boulder wheels because I wanted to obtain that traditional jeep look, but still have an aggressive look. These achieved both. Still looks traditional, but very aggressive. Thank you Team Extreme Terrain.

    Jesus

    Year: 2012Submodel: Wrangler

    Helpful (7)

  • 5/5

    November 30, 2018

    Review from Mammoth Boulder Matte Black Wheel - 17x9 -06mm Offset (07-18 Jeep Wrangler JK)

    Love them

    These wheels, along with some new tires, make my Jeep look so tough!

    LynetteG

    Year: 2016Submodel: Wrangler

    Helpful (7)

  • 5/5

    November 08, 2018

    Review from Mammoth Boulder Matte Black Wheel - 17x9 -06mm Offset (07-18 Jeep Wrangler JK)

    Love these

    Totally changed the look of our Wrangler for the better; absolutely love them. We were trying to replace all the silver parts for black, and these made a HUGE difference. Originally ordered 4, and left the spare temporarily. Got into a small accident in May and was essentially hit directly on one of the wheels; from the noise we heard from inside the Jeep, we thought we were totally wrecked, but when we looked afterwards, we were shocked. You could hardly tell anything had happened at all! Ended up just painting the small dent that was there and transferring the "damaged" wheel to the spare, as our insurance covered the cost of a new one. Obviously I'm not saying it's OK to get into accidents with these, but I'm very impressed with how well it held up under direct (albeit, slow-ish) impact.

    LydiaS

    Year: 2013Submodel: Wrangler

    Helpful (6)

  • 5/5

    November 07, 2018

    Review from Mammoth Boulder Matte Black Wheel - 17x9 -06mm Offset (07-18 Jeep Wrangler JK)

    Amazing

    These wheels are very dope. Tons of compliments since we received last week. Def worth the money.

    JasonT

    Year: 2017Submodel: Wrangler

    Helpful (5)

  • 5/5

    November 05, 2018

    Review from Mammoth Boulder Matte Black Wheel - 17x9 -06mm Offset (07-18 Jeep Wrangler JK)

    Love these wheels

    Very light weight,no rubbing and love the look of them

    DrewG

    Year: 2016Submodel: Wrangler

    Helpful (4)

  • 5/5

    October 18, 2018

    Review from Mammoth Boulder Matte Black Wheel - 17x9 -06mm Offset (07-18 Jeep Wrangler JK)

    Jeep wheels

    Wheels are just what I expected nice looking good fit backspacing makes the tires set out just past the fenders

    MichaelG

    Year: 2013Submodel: Wrangler

    Helpful (4)

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