Enhanced Concavity
Forging Profile Option
Enhanced Concavity
LFI concave profiles are built around the relationship between wheel width, offset, diameter, brake clearance, and forging depth. The goal is simple: push the face as deep as the car allows, without compromising fitment, caliper clearance, or structural integrity.
19–22 inch applications
Three concavity levels
Offset-sensitive design
Cost option
Maximum Concave Face
The Maximum Concave Face option is available for selected LFI Performance Series, Supreme Concave Series, and Project Speciale forged wheel designs. Depending on wheel width and offset, the face profile can be tuned from mild concave to a much deeper spoke drop.
Wider wheels and lower offsets generally allow stronger concavity. In aggressive applications, fitments can extend to very low offsets, including negative-offset builds where the vehicle body, suspension, and brake package allow it.
Three Concavity Levels
Concavity is not selected by diameter alone. The final face depth is calculated from the full fitment package: rim width, offset, brake clearance, vehicle platform, and the chosen forged wheel design.
The exact concavity level is confirmed during fitment planning. LFI checks the target wheel size, brake envelope, center profile, and vehicle clearance before production.
Deep Concave for High-Offset Cars
Some high-offset vehicles do not naturally allow a deep spoke profile because the wheel face must sit further outward to clear the hub and brake package. For these applications, LFI can offer a specialized heavy-duty blank option that creates a more pronounced concave look while keeping the fitment usable.
This is especially useful for cars where the customer wants a stronger visual stance but still needs proper inner clearance, brake clearance, and road-use reliability.
Fitment Still Comes First
Deep concavity must be balanced against caliper clearance, suspension clearance, fender position, tire width, and the actual offset range the vehicle can accept. The most aggressive face is not always the best face for every car.
LFI will always prioritize a correct forged-wheel fitment over forcing a face profile that creates clearance problems.
Deep Concave Forging Example
The deep concave forging concept shown below demonstrates how a pronounced face profile can be achieved even on a relatively high-offset fitment, using a 19×8.5J ET42 reference example.
Cost option: Enhanced concavity and deep concave blank selection are optional upgrades. Final availability depends on wheel size, brake clearance, vehicle platform, and the selected LFI wheel model.
Performance Machining Option
Anti-Slip Knurled Beads
Anti-slip knurled beads are small machined grooves on the inner bead seat of the wheel. They increase mechanical grip between the tire and rim, helping reduce tire slip during hard acceleration, braking, cornering, track use, or low-pressure off-road driving.
Machined bead-seat texture
Better tire-to-wheel grip
Track and performance option
Cost option
Why Knurled Beads Matter
Under heavy load, a tire can rotate slightly on the wheel before the car itself moves. That tiny slip can affect wheel balance, alignment marks, steering response, and repeatability during aggressive driving.
Knurled beads add controlled surface bite at the bead seat, helping the tire stay locked in position without changing the exterior look of the wheel.
Best Use Cases
This option is useful for track cars, drag builds, heavy EVs, off-road setups, and high-grip tire packages where tire movement on the rim can become a real-world issue.
It is a functional machining upgrade, not a cosmetic styling option.
Benefits of Anti-Slip Knurled Beads
Prevents Tire Slippage
Helps keep the tire locked against the rim during hard acceleration, braking, and cornering.
Improves Stability
Reduces unwanted tire movement that can affect balance, steering feel, and high-speed confidence.
More Consistent Performance
Useful for track, drag, off-road, and aggressive driving where repeatable grip matters.
Reduces Uneven Tire Wear
Minimizes movement-related wear patterns caused by the tire shifting against the bead seat.
Cost option: Anti-slip knurled beads are available as an optional machining upgrade on selected LFI forged wheel builds.
Structural Forging Detail
Annular Reinforcement Ribs
Annular reinforcement ribs are structural ridges added to selected areas of a forged wheel to improve stiffness, load distribution, and durability without simply making the wheel unnecessarily heavy.
Structural rib reinforcement
Improved wheel stiffness
Stress distribution support
No cost option
What Reinforcement Ribs Do
Instead of relying only on extra material thickness, reinforcement ribs allow the wheel structure to resist flex more efficiently. The rib geometry helps spread load across the wheel section and supports areas that see repeated stress during road use, cornering, braking, and impact loading.
This is especially useful on performance, EV, SUV, off-road, and track-focused builds where wheel stiffness and long-term fatigue resistance matter.
Why LFI Uses Them
A forged wheel should not be strong only on paper. It needs to hold its shape under real driving loads. Reinforcement ribs help maintain rigidity, reduce unwanted barrel or spoke-area flex, and improve the wheel’s ability to handle demanding use without adding excessive weight.
The result is a cleaner balance between strength, durability, and forged-wheel performance.
Benefits of Annular Reinforcement Ribs
Increased Strength
Helps distribute stress across the wheel structure and improves load-bearing performance under demanding use.
Enhanced Rigidity
Reduces unwanted flex so the wheel maintains its shape more consistently during aggressive driving.
Better Durability
Supports long-term resistance against repeated road loads, impacts, vibration, and fatigue stress.
Improved Heat Management
The additional surface structure can help manage heat around the wheel section during heavy braking or extended performance use.
No cost option: Annular reinforcement ribs are included where the selected wheel design, forging blank, and engineering package support them.