Mayhem Horizon 8120 Aluminum Alloy Wheel

The Mayhem Horizon 8120 is an aluminum alloy aftermarket wheel built for trucks, Jeeps, and SUVs, available in 18-inch and 20-inch diameters with load ratings up to 3,640 lbs on 40-inch tires. Each listing is priced per wheel. Two bolt patterns (6-135 and 6-139.7) and two offset options (0 mm and +18 mm) cover a range of fitments across the 18x9 and 20x9 sizes, all in Gloss Black.

Load Ratings Built for Real-World Use

The Mayhem Horizon 8120 carries load ratings up to 3,640 lbs when running 40-inch tires. That capacity matters when a loaded truck or Jeep is navigating rough terrain with a full gear kit. A wheel that can't keep pace with a heavier build becomes the weak point in an otherwise capable rig; the 8120's rating is sized for the application rather than a minimum-spec street wheel.

Aluminum Alloy Construction

The Horizon 8120 is cast from aluminum alloy, which keeps weight manageable relative to steel while maintaining structural integrity under load. The Gloss Black finish is the available option across all sizes and bolt patterns in this lineup.

TPMS Compatibility and Lifetime Structural Warranty

The Horizon 8120 is TPMS compatible, so existing tire pressure monitoring sensors can be retained without modification to the monitoring system. The Horizon 8120 carries a lifetime structural warranty covering the wheel's structural integrity.

Features

• Aluminum alloy construction: precision-cast from high-quality aluminum alloys
• Load rating up to 3,640 lbs: rated on 40-inch tires for truck, Jeep, and SUV applications
• Multiple fitment options: available in 6-135 and 6-139.7 bolt patterns with 0 mm and +18 mm offsets
• TPMS compatible: works with existing tire pressure monitoring sensors
• Lifetime structural warranty: covers the structural integrity of the wheel

Specifications

Manufactured in Thailand. Sold individually; the listed price is for one wheel.

Who This Is For and Isn't

The Mayhem Horizon 8120 suits truck, Jeep, and SUV owners running a 6-135 or 6-139.7 bolt pattern who need a load-rated aluminum alloy wheel in 18x9 or 20x9 sizing. The +18 mm offset variants and the 0 mm offset 20x9 option give builders flexibility in achieving their target stance.

The Horizon 8120 is not available in bolt patterns other than 6-135 and 6-139.7, and is not offered in finishes other than Gloss Black in this lineup. Vehicles requiring a hub bore larger than 106 mm or smaller than 87.1 mm are not covered by the available SKUs. The 6-135 bolt pattern is only offered in the 18x9 size at +18 mm offset.

Common Questions

Is the price for one wheel or a set of four?

The Mayhem Horizon 8120 is sold individually; the listed price is for one wheel. Buyers who need a full set of four should add four units to their cart, selecting the same size, bolt pattern, and offset for each.

Which bolt pattern and offset should I choose?

The Horizon 8120 is available in 6-139.7 (both 18x9 and 20x9) and 6-135 (18x9 only). Offset options are 0 mm (20x9 / 6-139.7 only) and +18 mm (all other SKUs). Match your vehicle's bolt pattern and confirm the offset works with your suspension and brake clearance before ordering.

What hub bore do these wheels use?

The 20x9 SKUs and the 18x9 / 6-139.7 SKU have a 106 mm hub bore. The 18x9 / 6-135 SKU has an 87.1 mm hub bore. Confirm your vehicle's hub bore before purchasing; a hub-centric ring may be required if your vehicle's hub is smaller than the wheel's bore.

What is the load rating for the Horizon 8120?

The Mayhem Horizon 8120 is rated up to 3,640 lbs when mounted with 40-inch tires. This rating is intended for truck, Jeep, and SUV applications where load capacity is a practical concern, not just a spec-sheet figure.

Are these wheels TPMS compatible?

Yes, the Mayhem Horizon 8120 is TPMS compatible. Existing tire pressure monitoring sensors can be transferred to these wheels without requiring a system override or replacement sensor in most cases, though installation specifics depend on the sensor type and vehicle.

What warranty covers the Horizon 8120?

The Horizon 8120 carries a lifetime structural warranty covering the wheel's structural integrity. Contact TerrainVault for assistance initiating a warranty claim.