Zone Offroad F125 Radius Arm Lift Kit — 5" Front / 3" Rear | Fox 2.0 Shocks | 2023–2026 Ford F-250 / F-350 Super Duty 4WD | Gas Engine Only | 2-Leaf Main Spring Pack Only

Two fitment gates. Radius arms required. Fox 2.0 shocks included.

Before ordering — confirm your engine and count your rear leaf springs. The F125 fits the 2023–2026 F-250 and F-350 4WD with a gas engine and a 2-leaf main spring pack. Miss either gate and you're ordering the wrong kit. Running a 3-leaf pack? Order F126. Want maximum lift? See F128.

The Zone Offroad F125 delivers 5 inches of front lift and 3 inches of rear lift on the 2023–2026 Super Duty solid front axle radius arm platform. At 5 inches of front lift, factory radius arms create significant caster misalignment — Zone Offroad's heavy-duty replacement radius arms re-establish proper caster geometry at full lift height. Reinforced crossmembers, front coil spacers, bump stop extensions, Fox 2.0 shocks front and rear, and a 3-inch rear block. This is not a spacer-only kit — radius arm replacement is required at this lift height.

Zone Offroad 2023–2026 Super Duty Gas radius arm kit selection:

Why radius arms are required at 5 inches: The 2023–2026 F-250/F-350 uses a radius arm front suspension with a solid front axle. At 5 inches of lift, factory radius arms create significant caster misalignment that degrades steering precision and on-road stability. Zone Offroad's heavy-duty replacement radius arms are longer and angled to re-establish correct caster geometry at full lift height. This is not a spacer-only kit — radius arm replacement is the engineering requirement for correct geometry at this height.

Kit contents:

• Heavy-duty radius arms (corrected caster geometry)
• Reinforced front crossmembers
• Front coil spacers
• Bump stop extensions
• 3-inch rear block spacer
• Fox 2.0 shocks — front and rear
• All required hardware

✅ This kit fits — two gates, both required

❌ This kit does NOT fit — read before ordering

Engine: Gas engine only. The 6.7L Powerstroke diesel and all diesel configurations are not compatible. Check your door jamb sticker or window sticker for your engine code before ordering.

Spring pack: Count your rear leaf springs before ordering — do not guess. Two leaves in the main stack — this kit. Three leaves — order F126.

⚠️ 2022 and earlier Super Duty owners: The 2023 Super Duty is a different platform generation from the 2017–2022 trucks. This kit does not fit — text (469) 407-7538 with your year and we'll confirm the correct kit.

⚠️ F-350 DRW owners: Dually fitment requires separate confirmation before ordering.

Before You Buy — Questions We Get Asked

Q: What's the difference between F125 and F126?

Same kit — same heavy-duty radius arms, reinforced crossmembers, front coil spacers, bump stop extensions, Fox 2.0 shocks, and 3-inch rear block. Same 5-inch front / 3-inch rear lift height. Same gas-only engine restriction. The only difference is the rear spring pack configuration the kit is engineered around. F125 fits trucks with a 2-leaf main spring pack. F126 fits trucks with a 3-leaf main spring pack. Count your rear leaf springs before ordering — do not guess.

Q: What's the difference between F125 and F128?

Both cover the same 2023–2026 Super Duty 4WD gas platform with radius arm replacement and Fox 2.0 shocks. F125 delivers 5 inches of front lift and 3 inches of rear lift. F128 delivers 7 inches of front lift and 4.5 inches of rear lift — the maximum lift option in this lineup. At 7 inches the engineering requirements increase significantly. For moderate lift with full geometry correction, F125. For maximum lift, F128.

Q: How do I count my rear leaf springs correctly?

Get under the rear of the truck and count the steel leaf springs in the main spring pack. Do not count any overload springs that sit above the main pack with a visible gap — count only the leaves in the main stack that are in full contact with each other. Two leaves — this kit. Three leaves — order F126. Text (469) 407-7538 with your year, trim, and any tow package codes if you're unsure.

Q: How does this ship and what do I need to know?

This kit ships via LTL freight carrier at 223 lbs. Residential delivery is included — the freight carrier will contact you to schedule a delivery window. Professional installation is required. Radius arm replacement on a solid front axle requires proper axle positioning, caster verification, and torque sequencing. Budget for a full 4-wheel alignment at the time of install and a re-torque appointment at 500 miles.

The Obsidian Take

The F125 is for the 2023–2026 Super Duty gas owner with a 2-leaf main spring pack who wants proper radius arm-based geometry correction at 5 inches of front lift with Fox 2.0 shocks. Zone Offroad's heavy-duty replacement radius arms re-establish correct caster geometry where factory arms create significant misalignment — this is not a spacer stack, it's a system-level geometry correction. Fox 2.0 shocks valved for the lifted solid front axle geometry deliver the dampening performance the platform needs at this lift height. The reinforced crossmembers maintain structural rigidity through the full lift. A 3-inch rear block completes the package.

This kit is not for diesel owners — gas engine only, confirmed before anything else. It is not for trucks with a 3-leaf main spring pack — the correct kit for 3-leaf is F126. It is not for 2022 or earlier Super Duty owners — different platform generation. F-350 DRW owners need to confirm separately. If maximum lift is the goal, step up to F128. Count your rear leaf springs before you check out — that's the gate that most people skip.

Product information is compiled from manufacturer-provided data. Obsidian Forged Auto Supply is not responsible for manufacturer-driven specification updates, metadata changes, or accuracy discrepancies in the foundational data sheets.

⚠️ LTL Freight Notice: This item ships via freight carrier due to size and weight. Residential delivery is included. Freight carrier will contact you to schedule delivery.

2023–2026 Ford F-250 / F-350 Super Duty 4WD. Gas engine only — diesel does not fit. 2-leaf main spring pack only — 3-leaf owners order F126. Maximum lift — see F128.