2018 Chevrolet Silverado 1500 Wheel Offset

Quick specs

Wheel size: 8x17 · 8.5x18 · 9x20 · 9x22
Offset: ET24 · ET27
Backspacing: 4.94 in · 5.19 in · 5.56 in · 5.44 in
Bolt pattern: 6×139.7
Center bore: 78.1 mm
Thread: M14×1.5
Tire size: Multiple — see configurations

Explore wheels at Tire Rack

Showing matching bolt patterns and offsets up to 30 mm lower. Confirm center bore, load rating, and clearance at Tire Rack.

Configuration

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OEM configurations

Configuration	Rim	Offset	Backspacing	Tire	Bolt pattern	Center bore	Thread
4.3 · V6, Flex-Fuel	8x17	ET24	4.94 in	255/70R17	6x139.7	78.1 mm	M14 x 1.5
4.3 · V6, Flex-Fuel	8x17	ET24	4.94 in	265/70R17	6x139.7	78.1 mm	M14 x 1.5
4.3 · V6, Flex-Fuel	8.5x18	ET24	5.19 in	265/65R18	6x139.7	78.1 mm	M14 x 1.5
4.3 · V6, Flex-Fuel	9x20	ET27	5.56 in	275/55R20	6x139.7	78.1 mm	M14 x 1.5
4.3 · V6, Flex-Fuel	9x22	ET24	5.44 in	285/45R22	6x139.7	78.1 mm	M14 x 1.5
5.3 · 5.3L, V8, Petrol	8x17	ET24	4.94 in	255/70R17	6x139.7	78.1 mm	M14 x 1.5
5.3 · 5.3L, V8, Petrol	8x17	ET24	4.94 in	265/70R17	6x139.7	78.1 mm	M14 x 1.5
5.3 · 5.3L, V8, Petrol	8.5x18	ET24	5.19 in	265/65R18	6x139.7	78.1 mm	M14 x 1.5
5.3 · 5.3L, V8, Petrol	9x20	ET27	5.56 in	275/55R20	6x139.7	78.1 mm	M14 x 1.5
5.3 · 5.3L, V8, Petrol	9x22	ET24	5.44 in	285/45R22	6x139.7	78.1 mm	M14 x 1.5
6.2 · 6.2L, V8, Petrol	8.5x18	ET24	5.19 in	265/65R18	6x139.7	78.1 mm	M14 x 1.5
6.2 · 6.2L, V8, Petrol	9x20	ET27	5.56 in	275/55R20	6x139.7	78.1 mm	M14 x 1.5
6.2 · 6.2L, V8, Petrol	9x22	ET24	5.44 in	285/45R22	6x139.7	78.1 mm	M14 x 1.5
4.3 · 4.3L, V6, Flex-Fuel	8x17	ET24	4.94 in	255/70R17	6x139.7	78.1 mm	M14 x 1.5
4.3 · 4.3L, V6, Flex-Fuel	8x17	ET24	4.94 in	265/70R17	6x139.7	78.1 mm	M14 x 1.5
4.3 · 4.3L, V6, Flex-Fuel	8.5x18	ET24	5.19 in	265/65R18	6x139.7	78.1 mm	M14 x 1.5
4.3 · 4.3L, V6, Flex-Fuel	9x20	ET27	5.56 in	275/55R20	6x139.7	78.1 mm	M14 x 1.5
4.3 · 4.3L, V6, Flex-Fuel	9x22	ET24	5.44 in	285/45R22	6x139.7	78.1 mm	M14 x 1.5

Lug hardware

Real-World 2018 Chevrolet Silverado 1500 Wheel Setups

Observed aftermarket setups from documented Modified1 builds. These are individual build records — not OEM specifications and not clearance guarantees for every vehicle.

Common custom wheel sizes

Among builds in our database for this model year:

20-inch — 2 documented builds
17-inch — 1 documented build

3 documented builds.

2018 Chevrolet Silverado 1500 custom wheel setup

17×? ET0

Documented on a 2018 Chevrolet Silverado 1500 build — observed custom fitment, not a universal fit guarantee.

Tires: 285/75R17

Suspension: Leveling Kit

Compared with OEM

Compared with the 17×8 ET24 OEM configuration. Calculated geometry only — not fit confirmation.

View full build on Modified1

20×10 ET-25

Documented on a 2018 Chevrolet Silverado 1500 build — observed custom fitment, not a universal fit guarantee.

Tires: 33/12.5R20

Suspension: Leveling Kit

Compared with OEM

Compared with the 20×9 ET27 OEM configuration. Calculated geometry only — not fit confirmation.

Outer edge 64.7 mm farther toward fender (more outward poke)
Inner edge 39.3 mm farther from suspension (more inner clearance)
Width +1" vs OEM

View full build on Modified1

20×9 ET20

Documented on a 2018 Chevrolet Silverado 1500 build — observed custom fitment, not a universal fit guarantee.

Tires: 285/55R20

Compared with OEM

Compared with the 20×9 ET27 OEM configuration. Calculated geometry only — not fit confirmation.

Outer edge 7 mm farther toward fender (more outward poke)
Inner edge 7 mm farther from suspension (more inner clearance)

View full build on Modified1

Compare your own setup

See how a different width or offset sits versus an OEM configuration for this year.

OEM baseline

Open full fitment calculator

More specs for the 2018 Chevrolet Silverado 1500

Each OEM row is a catalog configuration. Offset ranges are not collapsed when the database has exact setups. Documented aftermarket builds are observed setups only — not universal fit or clearance confirmation.