[Mateoye]

Had an insurance job where one of my rims needed replacing. How can I tell if it is OEM forged and not alloy?

 

[slohatch]

The markings on the inside of the spokes

 

[akras]

How can I tell if it is OEM forged and not alloy?

They are both alloy. One is forged, the other is cast.

 

[Rockster]

Had an insurance job where one of my rims needed replacing. How can I tell if it is OEM forged and not alloy?

Somewhere on the wheel is part number. Compare that of the new wheel against the original wheels.

Also, a cast wheel will have narrow casting seams from the mold. Forged wheel will have wider seams from the forging die.