2021 GMC Sierra 3500HD tire and wheel sizes, bolt pattern and tire pressure

Bolt patterns 8x210 or 8x180, depending on the market version.

Tires for the 2021 GMC Sierra 3500HD

Sizes most trims come with first. Open your trim below for its exact size.

235/80R17 Best-rated standard on 2 trims

Check price on Amazon · 235/80R17
275/70R18 Best-rated standard on 2 trims

Check price on Amazon · 275/70R18
275/65R20 Best-rated optional on 2 trims

Check price on Amazon · 275/65R20

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Trims sold in 2021: 4
Generation: V (T1XX)
Other years: 2017
2018
2019
2020
2021
2022
2023
2024
All years (1999–2026)

4 trims sold in 2021

Open a trim for its tire and rim sizes, bolt pattern and tire pressure. Trims with the same tires and wheels share a row.

GMC Sierra 3500HD V (T1XX)

2020–2023 4 trims

Sierra 3500HD 6.6 TD DRW 445 hp · 6.6L V8 · Diesel 235/80R17 117R 1 fitment

Generation: GMT T1XX · 2020–2023
Power: 445 hp
Engine: 6.6L V8, Diesel
Center bore: 154.2 mm
Bolt pattern: 8x210
Thread: M14 x 1.5

Check price on Amazon · 235/80R17 Wheels 17x6.5 ET125 · 8x210 · 154.2 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
235/80R17 117R	Rim 17x6.5 ET125 8x210	70 psi

How to read 117R: 117 is the load index (up to 2,833 lb / 1,285 kg per tire) and R the speed rating (up to 106 mph / 170 km/h). ET125 is the wheel offset: how far the mounting face sits from the rim centre, in millimetres. Compare offsets in the wheel offset calculator.

Sierra 3500HD 6.6 TD SRW +1 variant 445 hp · 6.6L V8 · Diesel 275/70R18 125S 2 fitments

Same tires and wheels on: 6.6i SRW

Generation: GMT T1XX · 2020–2023
Power: 445 hp
Engine: 6.6L V8, Diesel
Center bore: 124.1 mm
Bolt pattern: 8x180
Thread: M14 x 1.5

Check price on Amazon · 275/70R18 Wheels 18x8 ET44 · 8x180 · 124.1 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
275/70R18 125S	Rim 18x8 ET44 8x180	–
275/65R20 126S	Rim 20x8.5 ET47 8x180	–

How to read 125S: 125 is the load index (up to 3,638 lb / 1,650 kg per tire) and S the speed rating (up to 112 mph / 180 km/h). ET44 is the wheel offset: how far the mounting face sits from the rim centre, in millimetres.

Sierra 3500HD 6.6i DRW 401 hp · 6.6L L8T V8 235/80R17 1 fitment

Generation: GMT T1XX · 2020–2023
Power: 401 hp
Engine: 6.6L L8T V8, Petrol
Center bore: 154.2 mm
Bolt pattern: 8x210
Thread: M14 x 1.5

Check price on Amazon · 235/80R17 Wheels 17x6.5 ET125 · 8x210 · 154.2 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
235/80R17	Rim 17x6.5 ET125 8x210	70 psi

What these columns mean

Rim size: Rim diameter × width in inches, and the factory offset (ET) in millimetres, e.g. 18x7.5 ET25.
Bolt pattern (PCD): Number of studs and the diameter of the circle they sit on. It must match exactly.
Center bore: Diameter of the hub hole. Larger aftermarket bores need hub-centric rings.
Pressure: Recommended cold inflation pressure for that axle, in psi.
Thread size: Lug bolt or nut thread — needed when buying aftermarket fasteners.