5x120 to 5x114.3 Wheel Adapters 1.25 Inch for Chevy Camaro Buick Riviera GMC Jimmy, M12x1.5 Studs, 74mm Hub Bore, Set of 4

5x120 to 5x114.3 Wheel Adapters – 1.25 Inch, 74 mm Bore, Set of 4

This BDFHYK wheel adapter set is designed to convert a compatible 5x120 vehicle-side bolt pattern to a 5x114.3 wheel-side pattern. Each adapter is approximately 1.25 inch, or 31.75 mm, thick and uses a 74 mm center bore with M12x1.5 studs as listed. The conversion can expand wheel choices while moving the wheel mounting surface outward by approximately 31.75 mm per side.

These adapters are listed for selected applications associated with Chevrolet Camaro, Buick Riviera, GMC Jimmy, and related vehicles. Vehicle names alone do not confirm fitment. Model years, hub diameters, thread specifications, wheel center bores, and brake packages can differ, so all measurements must be verified before ordering.

What the Adapter Changes

• Vehicle-side bolt pattern: 5x120.
• Wheel-side bolt pattern: 5x114.3.
• Thickness: approximately 1.25 inch per side.
• Position change: the wheel moves outward and effective wheel offset is reduced by approximately 31.75 mm.

Common Fitment Scenarios

This adapter may support a project using selected 5x114.3 wheels on a verified 5x120 hub. The added thickness may also create more inner clearance around suspension parts, brake components, or the inner tire sidewall. That same outward movement reduces fender clearance. A wheel that clears the strut may contact the fender, liner, or bumper edge at full steering lock or during suspension compression.

Key Product Parameters

• 74 mm center bore as listed.
• M12x1.5 studs and matching adapter hardware configuration.
• Forged 6061-T6 aluminum construction with an anodized black finish.
• Grade 10.9 hardware as listed.
• Four adapters for a four-corner installation.

Fitment Checks Before Ordering

• Confirm the vehicle hub is 5x120 and the hub diameter fits the 74 mm adapter bore.
• Confirm the wheel is 5x114.3 and its center bore clears or correctly engages the adapter.
• Verify M12x1.5 thread compatibility and the required lug-seat style.
• Check whether original vehicle studs protrude beyond the adapter face.
• Confirm the wheel has sufficiently deep rear pockets or that the installation method safely resolves protrusion.
• Measure wheel offset, tire width, brake clearance, suspension clearance, and outer fender space.

Installation and Maintenance

Remove corrosion and debris so the adapter seats on a clean, flat hub face. Tighten the vehicle-side hardware in a star pattern with a calibrated torque wrench. Mount the wheel with compatible lug nuts and the correct seat profile. Check clearance through full steering travel and suspension compression before normal driving. Never stack wheel adapters or spacers. Recheck torque after the initial driving period and inspect for vibration, movement, contact marks, damaged threads, or uneven seating whenever the wheels are serviced.

Wheel adapters change both bolt pattern and wheel position; they do not correct an incompatible wheel center bore, incorrect lug seat, damaged hub, or insufficient load rating.