Question 1

What is a Ford chassis code?

Accepted Answer

A Ford chassis code is the internal platform identifier Ford uses to designate a specific generation. For example, U625 refers to the 6th-generation Explorer (2020-2024) and U625 F refers to the facelifted version (2025+). S650 refers to the current 7th-generation Mustang (2024+), while S550 refers to the prior generation (2015-2023). Ford enthusiasts and aftermarket suppliers use these codes because they specify the exact platform underneath, which determines wheel fitment specifications including bolt pattern, offset, hub bore, and brake clearance.

Question 2

Are Mustang GT350 and GT500 wheels interchangeable?

Accepted Answer

Mechanically the bolt pattern (5x114.3) and center bore (70.5mm) are the same across the S550 Mustang lineup, but the GT350 and GT500 use different OEM wheel widths, offsets, and brake packages. GT500s have larger Brembo brakes that require more inner barrel clearance. Wheels designed specifically for the GT350R or GT500 will fit a standard GT mechanically but won't necessarily clear the larger calipers if you upgrade brakes. Cross-shopping wheels between Shelby variants requires verifying brake clearance and offset against your specific brake package.

Question 3

Does FMB Wheels build custom forged wheels for the F-150 Raptor and Bronco Raptor?

Accepted Answer

Yes. FMB Wheels builds custom forged monoblock wheels for the F-150 Raptor (Gen 3 and Gen 4), Raptor R, and Bronco Raptor. While we have published fitment guides for the Explorer ST, we accept custom build requests for any Ford performance platform. Use the chassis lookup on this page to find your platform and request a guide or a build.

Question 4

What's the wheel fitment difference between the 2020-2024 Explorer ST and the 2025+ facelift?

Accepted Answer

The 2025+ Explorer ST facelift retains the same underlying CD6 platform as the 2020-2024 U625, so the core hardware specifications (bolt pattern, center bore, lug spec) carry over. However, the facelift updated brake configurations, wheel arch geometry, and OEM wheel offerings, which affects optimal aftermarket fitment. Each year range has its own dedicated guide because the offsets and tire clearances that work best for the 2020-2024 don't perfectly translate to the 2025+. Owners should reference the guide matching their specific year.

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