Ford F-350 Bolt Pattern and Wheel Fitment Guide

The legendary Ford F-350 is a one-ton platform that’s made to haul, tow, and perform under loads that would destroy a half-ton truck’s chassis. That capability comes with a particular set of wheel fitment requirements that are stricter than nearly any other vehicle in the aftermarket space. You get the wrong Ford F-350 bolt pattern, and the wheel simply won’t mount.

You get the offset wrong on a lifted build, and you’re looking at the premature bearing wear and handling instability under load. For many distributors and retailers, this is a truck where fitment accuracy protects the customer and the business. Every spec in this guide is generation-specific for that reason.

Understanding the Ford F-350 Bolt Pattern Basics

A bolt pattern, also known as the PCD, or the pitch circle diameter, tells two things: The number of lug holes and the diameter of the circle they sit on. For the F-350, that measurement is 8x170mm all across most Super Duty generations.

Eight lugs on a 170mm circle, that’s a larger bolt circle than the F-150’s 6x135mm, and the reason is very straightforward. More lugs spread the clamping load all over a wider surface, which matters when the truck is carrying 4,000 lbs of payload or towing close to 20,000 lbs. A wheel designed for a lighter platform will not have the structural geometry to handle those stresses, no matter if it physically bolts on.

SRW vs DRW — How Configuration Changes Fitment

This is the most common fitment misconception made on F-350 orders. Single Rear Wheel and Dual Rear Wheel configurations don’t share or have the same rear wheel specifications. Always confirm SRW or DRW configuration before processing a rear wheel order for any F-350.

• SRW rear: A standard hub bore of 125.1mm, conventional offset range.
• DRW rear: Wider hub, different offset requirements, inner and outer wheel position.
• Front axle: Both configurations have the same front fitment specs.
• Wheel width: Dual rear wheels are much narrower to allow dual mounting, usually ranging from 6.5 to 7 inches wide.
• Interchangeability: SRW wheels will not correctly seat on DRW rear hubs without modification; do not assume cross-compatibility

Generation Comparison Table

Ford F-350 Bolt Pattern by Generation

1987–1997 (OBS Generation)

The pre-super duty models had a different bolt pattern than their successors. The front axle ran an 8×165.1mm pattern, while the rear used a different configuration depending on the axle type. The hub bore measured 121.3mm. Factory wheels were 16-inch steel units. For aftermarket upgrades on this generation, fitment options are much narrower than those seen in the modern platform. Check the axle type before sourcing wheels for an OBS F-350.

1999–2004 (First Generation Super Duty)

The first-generation Super Duty was the one where an 8x170mm bolt pattern was introduced and standardized all F-250 and F-350 Super Duty models. The hub bore moved to 125.1mm. Factory wheel size ran to 16 and 17 inches. The offset range sat between 0mm and ET18mm on most configurations. This generation established the fitment baseline that carried through to modern super duty production. Wheels from this generation are widely common with the models later, provided the offset and hub bore are verified.

2005–2016 (Second and Third Generation Super Duty)

For the second and third generation Super Duty models, the bolt pattern stayed 8x170mm. The hub bore was kept at 125.1mm. Factory sizing expanded to include 17-inch and 18-inch alloy options on higher trims. The offset range for SRW models ran between ET0mm and ET18mm. Lifted builds were kept on the 20-inch wheel with a negative offset between a negative 12mm and a negative 18mm to clear larger tires. This generation has the widest aftermarket support of any F-350 platform.

2017–Present (Fourth Generation Super Duty)

For 2017 models and current production, F-350s have an 8x170mm bolt pattern and 125.1mm hub bore. Factory trim levels XL through platinum that offer 17, 18, and 20-inch wheel options, depending on the package. The Tremor off-road package introduced a specific 18-inch beadlock-capable wheel from the factory. Offset range on SRW models is ET18mm to ET34mm on stock ride height. The hybrid powertrain is not offered on the F-350, but increasing curb weight on higher-spec builds means load rating verification remains critical.

Ford F-350 Wheel Fitment Guide — Key Specs Explained

The offset on the F-350 is more consequential than on a passenger car because the truck’s wide track width and high suspension travel amplify the effect of any deviation from spec. Running too much positive offset pushes the wheel inward, on a truck with large tires, which causes contact with the inner fender and suspension components. Having too much of a negative offset and the wheel sits right outside the fender line, creating stress on the wheel bearing.

• Stock ride height SRW: ET18mm to ET34mm is the safe working range
• Lifted 4–6 inches: ET0mm to ET-12mm depending on tire width
• Lifted over 6 inches: Negative offset between -12mm and -25mm is common
• Backspacing on stock SRW:5 to 5 inches

Always recalculate backspacing when changing lift height and tire size simultaneously.

Tire and Wheel Size Compatibility

Factory F-250 sizes run from 16 inches on base work-spec models to 20 inches on premium trims. Aftermarket upgrades usually push into the 20 and 22-inch range for aesthetic builds, while the off-road-focused trucks stay at 17 or 18 inches to maintain tire sidewall for off-road compliance.

For compliance and daily use on the F-350,  20-inch alloy wheels provide the right balance between brake clearance and tire sidewall. For most builds where the sidewall compliance and off-road performance matter, 19-inch alloy wheels are worth selecting based on the nature of the application.

• Maximum practical diameter without lift: 20 inches
• With a 4-inch lift, 22 inches is achievable on most SRW builds
• Tire diameter variance on xDrive-style AWD systems: keep within 1% front to rear

Load Rating Requirements for the F-350

The F-350 has a GVWR ranging from 11,000 to 14,000 lbs, depending on the configuration. That figure was divided across four wheels, which means each wheel needs to support between 2,750 and 3,500 lbs at maximum capacity. Most aftermarket wheels are rated for light durability and will not withstand the following threshold:

• Minimum load rating per wheel for SRW: 1,500kg (3,307 lbs)
• DRW rear wheels carry shared load — individual rating requirements shift
• Look for JWL, VIA, or TÜV certification on any wheel being sourced for F-350 applications.
• Cast wheels at large diameters (20″+) often fall short of required load ratings — verify before stocking.

Common Ford F-350 Wheel Fitment Mistakes

Now these are the errors that can generate returns, complaints, and in worst cases, safety failures on the road:

• Ordering SRW wheels for a DRW build— The most common and the most expensive mistake in the F-350 fitment.
• Ignoring the OBS bolt pattern difference— 1987 – 1997 pickup used 8×165.1mm, not 8x170mm.
• Running passenger car load-rated wheels— Structurally not ideal for any loaded F-350 specification.
• Wrong offset on lifted builds— factory offset on a 6-inch lift causes tire-to-fender contact under suspension compression.
• Hub bore mismatch— A wheel that’s not hub-centric on a 125.1mm hub will always cause minor vibration at highway speed under load capacity.
• Skipping brake caliper clearance check— F-350 front brakes are quite large; spoke geometry should clear the caliper before an order is confirmed.

Best Wheel Types for the Ford F-350

Forged Wheels

Going with the forged wheels is the best option for the F-350 and the most right build that functions anywhere near the maxed-out payload or tow rating. The weight savings over cast, usually 20 to 30% at equivalent diameter, reduce unsprung mass, which improves the suspension response on a platform that carries enough axle weight. Look to the wheel fitment guide to match forged wheel specs to your specific F-350 configuration before ordering.

Flow-Formed Wheels

The flow-formed wheels secure the place between cast and forged in terms of pricing and performance. The barrel is much stronger than a regular cast wheel, and the total weight is much lower. For most F-350 owners who are looking for something better than cast, flow-formed is the right choice that most quality aftermarket brands make in the 8x170mm fitment.

Cast Wheels

Cast wheels are known for the light-duty use on the F-350 fleet vehicles that carry less load and aren’t purposely designed for towing. For any rugged and tough application, cast wheels with large diameters carry a risk of structural fatigue under repeated load cycles.

Final Thought

Ford F-350 bolt pattern and fitment needs are quite straightforward once the generation and configuration are confirmed. But the margin for these errors is much smaller than on any passenger vehicle. For distributors and retailers, getting those specs right on every order is what separates a reliable supplier from one that generates returns.

KIPARDO Racing manufacturers forged and flow-formed wheels in the 8x170mm fitment with the JWL/VIA certification and load ratings that are best suited for heavy-duty truck specifications. Consult experts at KIPARDO to discuss bulk sourcing for your F-350 inventory.

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