The THRET Offroad 702 Firewall is a cast aluminum wheel for the 2021, 2022, 2023, 2024, 2025, and 2026 Ford Bronco. The wheel is drilled for the Bronco's factory 6x139.7 bolt pattern, so it bolts straight on with no adapters. It carries a 2,500-pound load rating per wheel.

Two Finishes

THRET Offroad builds the 702 Firewall in two finishes. Bronze is a warm bronze tone across the whole wheel. Satin Black is a flat, low-shine black. Both finishes come in all four sizes.

Pick your finish first. The size menu then shows all four sizes for that finish. Each size lists its offset and backspacing, so you can see how far the wheel will sit out before you choose.

Sizes and Offsets

The 702 Firewall comes in four size and offset combinations for the Bronco. The 17x9 comes with a -12mm or +18mm offset. The 18x9 and 20x9 each come with a -12mm offset.

Every size in the menu lists three numbers. The first is the wheel size, such as 17x9. That means a 17-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.

Backspacing is the distance from the mounting face to the inner edge of the wheel. It is measured in inches. The -12mm sizes have 4.5 inches of backspacing. The +18mm size has 5.7 inches. A lower backspacing number puts more of the wheel outside the hub and gives a wider stance.

A wider stance looks more aggressive, but it also moves the tire closer to the fender. 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 702 Firewall uses 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.

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 702 Firewall. 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 702 Firewall with a 2-year manufacturer warranty.