Baseline mounting dimensions used for interchange decisions.
Multiple OEM configurations exist for this vehicle. Fitment can vary by trim, brakes, and factory wheel package – confirm your exact setup before buying.
Results are evaluated from bolt pattern, center bore direction, OEM width/offset envelope, and lug hardware – not bolt pattern alone.
HardwareLug nuts for M12x1.5
Use lug nuts compatible with your vehicle's studs. Geometry within known OEM envelope (approx. outer change -1.17 mm, inner change -5.18 mm vs mid OEM).
HardwareLug nuts for M12x1.5
Use lug nuts compatible with your vehicle's studs. Geometry within known OEM envelope (approx. outer change -1.17 mm, inner change -5.18 mm vs mid OEM).
HardwareLug nuts for M12x1.5
Use lug nuts compatible with your vehicle's studs. Geometry within known OEM envelope (approx. outer change 5.18 mm, inner change 1.17 mm vs mid OEM).
HardwareLug nuts for M12x1.5
Use lug nuts compatible with your vehicle's studs. Geometry within known OEM envelope (approx. outer change 5.18 mm, inner change 1.17 mm vs mid OEM).
HardwareLug nuts for M12x1.5
Use lug nuts compatible with your vehicle's studs. Geometry within known OEM envelope (approx. outer change 5.18 mm, inner change 1.17 mm vs mid OEM).
HardwareLug nuts for M12x1.5
Use lug nuts compatible with your vehicle's studs. Geometry within known OEM envelope (approx. outer change -1.17 mm, inner change -5.18 mm vs mid OEM).
HardwareLug nuts for M12x1.5
Use lug nuts compatible with your vehicle's studs. Geometry within known OEM envelope (approx. outer change -1.17 mm, inner change -5.18 mm vs mid OEM).
Required part70.3 → 66.9 mm hub-centric rings
Required: 70.3 → 66.9 mm hub-centric rings. Geometry within known OEM envelope (approx. outer change -1.17 mm, inner change -5.18 mm vs mid OEM).
Required part70.3 → 66.9 mm hub-centric rings
Required: 70.3 → 66.9 mm hub-centric rings. Geometry within known OEM envelope (approx. outer change -1.17 mm, inner change -5.18 mm vs mid OEM).
Required part70.3 → 66.9 mm hub-centric rings
Required: 70.3 → 66.9 mm hub-centric rings. Geometry within known OEM envelope (approx. outer change -1.17 mm, inner change -5.18 mm vs mid OEM).
Required part70.3 → 66.9 mm hub-centric rings
Required: 70.3 → 66.9 mm hub-centric rings. Geometry within known OEM envelope (approx. outer change -1.17 mm, inner change -5.18 mm vs mid OEM).
Required part70.2 → 66.9 mm hub-centric rings
Required: 70.2 → 66.9 mm hub-centric rings. Use lug nuts compatible with your vehicle's studs. Geometry within known OEM envelope (approx. outer change -0.17 mm, inner change -6.18 mm vs mid OEM).
Bolt pattern data is incomplete for a full interchange decision.
Only years with evidence-based interchange relationships are listed. Adjacent years are not assumed compatible.
Compare a donor vehicle or custom wheel against this 2018 GMC Terrain.
Compare wheel compatibility between two vehicles
2018 GMC Terrain
Products below are matched to required fitment dimensions from our parts inventory. Confirm seat style, thickness, and clearance before ordering.
M12 x 1.5
M12 x 1.5 · Confirm wheel seat style before ordering
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M12 x 1.5 · Confirm wheel seat style before ordering
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M12 x 1.5 · Confirm wheel seat style before ordering
View on Amazon →5x115 · 66.9 mm hub
Directional bolt-pattern adapters. A spacer does not change PCD.
5x115 → 5x120.7
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5x115 → 5x120.7
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5x115 → 5x127
View on Amazon →As an Amazon Associate we earn from qualifying purchases. Product availability and pricing may change.
Wheel interchange depends on more than bolt pattern. Where data is available, this site compares:
A normal wheel spacer does not change bolt pattern. Hub rings cannot enlarge a wheel bore that is smaller than the hub. Brake clearance and tire package fitment still require vehicle-specific checks when not confirmed in the dataset.
The following specifications are the known reference values for a 2018 GMC Terrain. Equipment can vary by trim, package, market, and replacement-wheel history, so confirm the specifications for your specific vehicle before purchasing wheels or tires.
| Specification | Known value |
|---|---|
| Bolt pattern | 5x120 |
| Center bore | 66.9 mm |
| Thread size | M14 x 1.5 |
| Rim diameter | 17 inches |
| Rim width | 7.0 inches |
| Wheel offset | ET41, or 41 mm |
| Backspacing | 5.11 inches |
| Known tire size reference | 225/65R17 |
| Tire section width | 225 mm |
| Tire aspect ratio | 65 percent |
This is a fitment reference, not a substitute for the vehicle placard, owner’s manual, or the wheel and tire markings on your Terrain. Confirm the original specification for your trim and check the required tire load index and speed rating before ordering.
Use the calculator to compare a donor vehicle’s wheels with the wheels you plan to install on your 2018 GMC Terrain. Enter the donor information under Wheels from and the Terrain information under Installed on.
A calculator result is a screening tool. A result that appears dimensionally close does not guarantee safe installation. Always perform a physical test fit when wheel design, brake clearance, or tire size is uncertain.
Plus sizing usually means using a larger rim diameter with a lower-profile tire while trying to keep the overall tire diameter close to the original. This can change steering response, ride comfort, road-noise levels, wheel damage risk, and speedometer accuracy. It can also reduce the amount of sidewall available to protect the rim.
Do not choose a tire solely by matching its outside diameter. The replacement tire must also fit the wheel’s width, meet or exceed the required load and speed ratings, and provide adequate clearance. The calculator can compare custom rim diameter, rim width, offset, tire section width, and aspect ratio, but it does not replace the tire maker’s fitment data or an in-person clearance inspection.
Because the available OEM information may not cover every 2018 GMC Terrain trim, confirm the original tire size and wheel specification on the driver-door certification label, in the owner’s manual, or through a GMC dealer. Do not assume that a wheel from another vehicle is compatible just because it has a 5x120 pattern.
Useful supplies include a calibrated torque wrench, a suitable socket, a jack and correctly rated jack stands, wheel chocks, a tire-pressure gauge, and a wire brush or approved hub-cleaning tool. Use the vehicle’s designated lifting points and follow the service manual for safe support procedures.
Wheel spacers, adapter plates, and replacement lug hardware should not be used as a shortcut for an incorrect fitment. If any spacer or adapter is considered, obtain vehicle-specific engineering guidance and follow its separate installation and torque requirements.
What is the bolt pattern for a 2018 GMC Terrain?
The known reference bolt pattern is 5x120. Confirm the pattern on the vehicle or through an OEM source before ordering replacement wheels.
What is the center bore?
The known center bore is 66.9 mm. A larger wheel bore may need correctly sized hub-centric rings, while a smaller bore generally cannot fit over the hub.
What is the known OEM wheel and tire reference?
The provided reference is a 17 x 7.0-inch wheel with ET41 offset and a 225/65R17 tire. Trim and market differences are possible, so verify the door-label and owner’s-manual information for your vehicle.
Can any 5x120 wheel fit a 2018 GMC Terrain?
No. Bolt pattern is only one requirement. You must also check center bore, offset, width, load rating, lug-seat compatibility, brake clearance, suspension clearance, and tire specifications.
Can I use the wheel interchange calculator to choose a larger wheel?
Yes. Enter the proposed diameter, width, and offset under Custom wheel size, then enter the proposed section width and aspect ratio under Custom tire size. Review the updated tire diameter and clearance comparison, then confirm the result with manufacturer data and a physical inspection.
Does changing rim diameter change tire diameter in the calculator?
Yes. Changing the rim diameter updates the tire diameter in the comparison. The displayed result should be reviewed together with tire aspect ratio, section width, load rating, and available clearance.
What lug-nut specification should I use?
The known thread size is M14 x 1.5, but the correct lug-nut seat, length, and style depend on the wheel. Use the hardware specified by the wheel manufacturer and verify the vehicle manufacturer’s torque requirement.
Will aftermarket wheels work with the original TPMS system?
Compatibility depends on the wheel sensors and the vehicle’s monitoring system. Confirm sensor frequency, valve-stem compatibility, programming, and relearn requirements before installation.
Where can I confirm the correct fitment for my specific Terrain?
Check the driver-door certification label, owner’s manual, original wheel and tire markings, GMC service information, or a GMC dealer. Compare those details with the on-page calculator, and do not proceed if the required specification remains unknown.
