Specs verified against manufacturer data
Bolt pattern
4x98
Center bore
58.1 mm
Factory wheel sizes
17-18"
Fastener
bolt
Thread
M12x1.25
Seat
conical
Torque
72 lb-ft
The Alfa Romeo 4C uses a 4x98 bolt pattern with a 58.1mm center bore. Factory wheel sizes range from 17-18". When shopping for wheels, ensure the rim's center bore is at least 58.1mm (a hub-centric ring can adapt a larger bore down). Factory torque spec is 72 lb-ft. Use M12x1.25 bolt. Always confirm torque and hardware against your owner's manual before installing.
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