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XD838 MAMMOTH — Gloss Black Milled W/ Red Tint
Fits your vehicle
· Bolt —
· BP2 —
· Hub —
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READY TO SHIP · ALREADY BUILT — NO WAIT
Set = 2 left + 2 right
Sold as a left + right set (2 left + 2 right).
Sold as a left + right set (2 left + 2 right).
FREESHIPPING
FITMENTGUARANTEED
PRO INSTALLAVAILABLE
Bolt Pattern
Also available in other bolt patterns — pick yours
Front
2
Rear
2
Set total—
Your Size
—
Offset —
BP1 —
BP2 —
Dual-drilled
Hub —
Finish —
MPN —
Currently out of stock
Choose another size, offset, or finish — or call (678) 400-6467.
Per wheel
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Set of 4
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Call for Quote
This wheel is built to your exact spec — call (678) 400-6467 for an itemized quote. Pricing depends on the size, finish, and build options you choose.
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*Estimated lease-to-own payment — tap an option for details. Final approval and terms are determined by the lender. See all rim financing options →
Acima
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Final approval and terms are determined by the lender.
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Quantity
4
Special Order — Built to Order
This wheel is forged to order at the factory. Typical build & ship time is 6–8 weeks. You can check out now to lock in your build slot and pricing — we'll confirm the ETA after your order and keep you updated.
Notify me when available
Drop your email and we'll let you know the moment this XD XD838 MAMMOTH — Gloss Black Milled W/ Red Tint is back in stock. Or call 678-400-6467 — we can sometimes source faster.
Directional wheel — set of 4 needs 2 Left + 2 Right.
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Installed by Road Runner Wheels & Tires — family-owned in Marietta since 2010. Questions? Call (678) 400-6467.
About This Wheel
Pick up a Mammoth and the first thing you notice is the weight distribution — this is a thick, substantial wheel with a deep-dish negative offset that pushes the face well outside the fender plane. The multi-spoke layout is chunky rather than delicate, with each spoke flaring toward the barrel in a way that reads as purposeful. The milled pockets cut through the gloss black to expose raw aluminum underneath, and the red tint layered over those cuts gives the face a smoldering quality in direct sunlight — not flashy, but deliberate. That combination works particularly well against satin white, magnetic grey, and flat military green body colors. This wheel belongs on a heavy half-ton or three-quarter-ton truck, lifted or leveled, where the -18mm offset can actually breathe.
Specifications
| Diameter x Width | 20" x 10" |
|---|---|
| Bolt Pattern | 8x170 |
| Offset | ET-18mm |
| Backspacing | 4.79" |
| Hub Bore | 125.10mm |
| Load Rating | 3640 lbs |
| Construction | Cast |
| Material | Aluminum alloy |
| Finish | GLOSS BLACK MILLED W/ RED TINT |
| Manufacturer Part Number | XD83821087918N |
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How it works
- 1 Call 678-400-6467 to confirm fitment & availability
- 2 Apply above or choose your financing option at checkout
- 3 Get approved instantly — no delay
Fitment
This wheel runs the 8x170 bolt pattern, which covers a range of half-ton trucks and SUVs depending on hub bore and offset. ET-18mm offset is typical for stock-height fitments; leveled and lifted trucks may want different offset/backspacing combinations to clear larger tires. A hub-centric ring is recommended when the wheel hub bore is larger than the vehicle hub.
About the GLOSS BLACK MILLED W/ RED TINT Finish
XD Series has been part of the KMC Wheels family for years, and the Mammoth line reflects that engineering background — cast construction with wall thicknesses and load ratings sized for trucks that actually work. They're not a boutique brand chasing trends. The designs lean aggressive and the fitment data is well-documented, which matters when you're speccing an 8-lug truck application.
About XD
XD produces wheels distributed nationally through trusted vendor channels. Catalogs are stocked, MAP-pricing is enforced, and warranty coverage is honored at the manufacturer level.
Installing at Road Runner Wheels & Tires
Mount and balance is same-day in most cases in our shop. We program TPMS sensors on-site and pair wheels with matching tires when needed. Same shop handles lift kits, suspension work, and full builds.
Questions We Get
Will this fit my truck?
This wheel is built around the 8x170 bolt pattern at a -18mm offset in a 20x10 size, which is a common spec for Ford Super Duty F-250 and F-350 trucks. That said, final fitment depends on your specific cab, bed, suspension lift, and brake caliper clearance — bring your vehicle in and we'll verify before anything gets mounted.
Do lug nuts come included?
No, lug nuts are sold separately. The Mammoth uses a standard open-end or closed-end seat depending on your hub, so make sure the seat type and thread pitch match your studs — typically 14x1.5 or 14x2.0 on Ford Super Duty applications. We stock the appropriate hardware and can confirm the right fitment at the counter.
Fitment specs: the XD XD838 MAMMOTH 20x10 BLACK 8x170 comes in 8x170 bolt pattern, ET-18 offset, 4.79" backspacing, 125.10mm hub bore, a 3640 lbs load rating.
Looking for wheels, rims & tires near you in the Atlanta metro? We mount + balance same day at our Marietta tire shop — 1585 Roswell Rd. Serving Marietta, Atlanta, Cobb County, Kennesaw, Smyrna, Sandy Springs, Roswell, Alpharetta, Buckhead + Vinings.
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