The THRET Offroad 801 Vulcan is a cast aluminum wheel for the 2021, 2022, 2023, 2024, 2025, and 2026 Ford Bronco. THRET Offroad gives it an 8-spoke Y design with a lip around the outer edge. The wheel is dual-drilled for the 6x135 and 6x139.7 bolt patterns. The Bronco uses 6x139.7, so it bolts straight on with no adapters.

Two Finishes

THRET Offroad builds the 801 Vulcan in two finishes. Gloss Black is a shiny black across the whole wheel. Satin Black/Dark Tint is a flat black with a darker tinted face for a lower-shine look.

Not every size comes in every finish. Pick your finish first. The size menu then shows only the sizes that finish comes in.

Sizes and Offsets

The 801 Vulcan comes in 17x9 and 20x9 for the Bronco. The 17x9 comes with a +18mm offset. The 20x9 comes with a -12mm, 0mm, or +18mm offset in Gloss Black, and a 0mm or +18mm offset in Satin Black/Dark Tint.

Every size in the menu lists three numbers. The first is the wheel size, such as 20x9. That means a 20-inch diameter and a 9-inch width. The second is the offset. The third is the backspacing.

What Offset and Backspacing Mean

Offset is the distance between the center of the wheel and the face that bolts to your hub. It is measured in millimeters. A negative offset, like -12mm, moves the wheel out toward the fender. A positive offset, like +18mm, pulls the wheel in toward the frame. A 0mm offset sits in between.

Backspacing is the distance from the mounting face to the inner edge of the wheel. It is measured in inches. The 801 Vulcan ranges from 4.5 to 5.7 inches on the Bronco sizes. A lower backspacing number puts more of the wheel outside the hub and gives a wider stance.

Tire size, lift height, and your trim's fender flares all change how much room you have. Check those before you pick an offset.

Fitment

The 801 Vulcan fits the 6x139.7 bolt pattern that Ford uses on every 2021 through 2026 Bronco. The center bore is 106.1mm, which is larger than the Bronco hub. That means the lug nuts center the wheel on the hub. Hub-centric rings are an option if you want the hub to carry the centering job.

Each wheel carries a 2,500-pound load rating. The lug seat is a conical acorn and spline style. The wheel is DOT approved and works with factory TPMS sensors. A center cap is included with each wheel.

Confirm your offset and tire clearance before you order. Wheels are not accepted for return once a tire has been mounted.

Installation

A tire shop mounts and balances your tires on the 801 Vulcan. The wheels then bolt to the Bronco with lug nuts that match the conical seat. Plan on about two hours for a full set, including mounting and balancing.

Bronco Forge lists the offset and backspacing for every size right in the menu. That way you can match the stance you want before the wheels ship. THRET Offroad backs the 801 Vulcan with a 2-year manufacturer warranty.