LM1 FORD SUPER DUTY FORGED INNER Cs
Limited Qty avalible to ship now.
- Designed for custom front and rear stear buggy axle builds
- Accepts 2008–2016 Ford Super Duty steering knuckles and outer axle components
- Compatible with many aftermarket upgrades designed around the factory Super Duty outer-end geometry
- Manufactured from forged 1045 carbon steel
- Approximately 20 lb finished weight depending on tube bore
- Approximately 37% lower peak stress than the OE Super Duty geometry in LM1’s comparative 5,000 lb FEA load case
- Purpose-built for rock crawlers, buggies, and custom off-road axle fabrication
LM1 Ford Super Duty Forged Inner Cs
Fitment
LM1 Ford Super Duty Forged Inner Cs are designed for custom axle fabrication, including rock crawlers, buggies, and other purpose-built off-road vehicles.
They are engineered around 2008–2016 Ford Super Duty knuckle and outer-end geometry, allowing builders to use readily available factory Super Duty components such as knuckles, hubs, brakes, and related outer axle parts.
Product Overview
The Inner C is one of the most heavily loaded structural components in a solid front axle. Larger tires, increased vehicle weight, aggressive off-road use, and upgraded steering and suspension components can all increase the forces transferred through this area.
LM1 developed its Super Duty Inner C as a stronger and more efficient alternative to the factory component.
Each LM1 Inner C begins as a forged 1045 carbon steel blank and is then precision post-machined to establish the critical ball-joint, knuckle, and axle-tube geometry.
The LM1 Inner C weighs approximately 20 lb which is equal to the OEM weight of 20 lb. Rather than simply adding material, LM1 focused on improving the geometry and placing material where it provides the greatest structural benefit.
The result is a component that is equal in weight to OE while also showing substantially lower peak stress in comparative finite element analysis.
Forged 1045 Carbon Steel
LM1 Super Duty Inner Cs are manufactured from forged 1045 carbon steel.
Forging forms the steel under high pressure, producing a dense component well suited for the repeated bending, impact, and steering loads encountered in demanding axle applications.
After forging, each Inner C is precision post-machined to establish the critical dimensions and interfaces required for proper axle assembly.
Precision Machined for Factory-Compatible Fitment
Critical features are machined after forging to maintain accurate fitment and factory-compatible geometry.
Machined interfaces include those required for:
- 2008–2016 Ford Super Duty steering knuckles
- Ball joint installation
- Axle tube installation
Maintaining these critical interfaces also preserves compatibility with many aftermarket upgrades designed around the factory Super Duty outer axle configuration.
Optimized Geometry, Not Just More Material
LM1 didn't simply make the factory component heavier.
The Super Duty Inner C was developed through multiple design iterations using comparative finite element analysis. Each iteration was used to identify high-stress areas, evaluate load paths, and determine where material would provide the greatest structural benefit.
Section thicknesses, transitions, and geometry were refined to improve strength and load distribution without simply increasing overall mass.
The LM1 Inner C weighs approximately 20 lb, which is comparable to the OE Super Duty Inner C. Despite the similar weight, the LM1 geometry produced approximately 37% lower peak stress in the same 5,000 lb comparative FEA load case.
Engineered for Strength
LM1 didn't simply make the factory component heavier.
The Super Duty Inner C was developed through multiple design iterations using comparative finite element analysis. Each iteration was used to identify high-stress areas, evaluate load paths, and determine where material would provide the greatest structural benefit.
Section thicknesses, transitions, and geometry were refined to improve strength and load distribution without simply increasing overall mass.
The LM1 Inner C weighs approximately 20 lb, which is comparable to the OE Super Duty Inner C. Despite the similar overall weight, the LM1 geometry produced substantially lower peak stress in the same simulated loading condition.
Comparative FEA Results
The OE and LM1 Super Duty Inner C designs were evaluated under the same 5,000 lb simulated load condition.
| OE Super Duty Inner C | LM1 Super Duty Inner C | |
| Approx. Weight | 20 lb | 20 lb |
| Peak von Mises Stress | Approx. 294 MPa | Approx. 186 MPa |
| Peak Stress Reduction | — | Approx. 37% |
| Referenced Yield Strength | 530 MPa | 530 MPa |
| Simulated Factor of Safety to Yield | Approx. 1.80 | Approx. 2.86 |
Under the analyzed 5,000 lb load case, the OE geometry produced a maximum von Mises stress of approximately 294 MPa, while the LM1 design produced approximately 186 MPa.
That represents approximately a 37% Reduction in Peak Stress under the same simulated loading conditions.
With both components weighing approximately 20 lb, the reduction in simulated stress comes from more efficient geometry and strategic material placement, rather than simply adding additional mass.
Using the 530 MPa yield strength referenced in the analysis, the simulated factor of safety to yield increased from approximately 1.80 for the OE geometry to approximately 2.86 for the LM1 geometry.
Image shows a side by side compartision of the Ford Super Duty OEM C (left) vs the forged LM1 C (right)
LM1 — Engineered Confidence.
Finite element analysis results are simulation-based and represent the specific loading, material properties, constraints, and boundary conditions used in the analysis. FEA is used as an engineering design and comparison tool and does not represent a certified component load rating.