20×?
Documented on a 2007 GMC Sierra 2500HD build — observed custom fitment, not a universal fit guarantee.
- Tires
- 275/55R20
Compared with OEM
Compared with the 20×8 ET24 OEM configuration. Calculated geometry only — not fit confirmation.
2007 GMC Sierra 2500HD Wheel Offset
Quick specs
- Wheel size
- 8x20 · 8.5x20 · 9x20
- Offset
- ET24 · ET20
- Backspacing
- 4.94 in · 5.04 in · 5.29 in
- Bolt pattern
- 8×180, 8×165.1
- Center bore
- 124.1 mm, 116.7 mm
- Thread
- M14×1.5
- Tire size
- 265/60R20 · 275/55R20 · 285/50R20
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.
OEM configurations
| Configuration | Rim | Offset | Backspacing | Tire | Bolt pattern | Center bore | Thread |
|---|---|---|---|---|---|---|---|
| 6.0i · V8, Petrol | 8x20 | ET24 | 4.94 in | 265/60R20 | 8x165.1 | 116.7 mm | M14 x 1.5 |
| 6.0i · V8, Petrol | 8.5x20 | ET20 | 5.04 in | 275/55R20 | 8x165.1 | 116.7 mm | M14 x 1.5 |
| 6.0i · V8, Petrol | 9x20 | ET20 | 5.29 in | 285/50R20 | 8x165.1 | 116.7 mm | M14 x 1.5 |
| 6.6TD · V8, Diesel | 8x20 | ET24 | 4.94 in | 265/60R20 | 8x165.1 | 116.7 mm | M14 x 1.5 |
| 6.6TD · V8, Diesel | 8.5x20 | ET20 | 5.04 in | 275/55R20 | 8x165.1 | 116.7 mm | M14 x 1.5 |
| 6.6TD · V8, Diesel | 9x20 | ET20 | 5.29 in | 285/50R20 | 8x165.1 | 116.7 mm | M14 x 1.5 |
Lug hardware
More on Amazon
M14x1.5 Lug Nuts Black with Spline Tuner, XL…Confirmed vehicle catalog match. Confirm seat type for your wheel.
Check on Amazon
MIKKUPPA M14x1.5 Wheel Lug Nut - Replacement for…Confirmed vehicle catalog match. Confirm seat type for your wheel.
Check on Amazon
Dorman 611-236 Wheel Nut M14-1.50 Flattop Nut -…Confirmed vehicle catalog match. Confirm seat type for your wheel.
Check on Amazon
Real-World 2007 GMC Sierra 2500HD 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 — 1 documented build
1 documented build.
Compare your own setup
See how a different width or offset sits versus an OEM configuration for this year.
More specs for the 2007 GMC Sierra 2500HD
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.