Buick OEM-Style Silver Multi-Spoke Forged Wheels
Monoblock · Silver
2020 Buick Excelle GT II Wheels & Rims: Bolt Pattern, Offset & Sizes
Fitting Buick Excelle GT II wheels? This page gives the 2020 Buick Excelle GT II bolt pattern (5x105), centre bore, factory rim size and the offset range for aftermarket and forged Buick Excelle GT II rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.
Quick answer: The 2020 Buick Excelle GT II uses a 5x105 bolt pattern with a 56.6 mm centre bore and M12x1.5 lug nuts. Factory wheels: 15x6J, front and rear.
Forged wheels for the 2020 Buick Excelle GT II — drilled 5x105 with a 56.6 mm centre bore, built to the offset you choose. From $220 per wheel, made to order in 20–25 days.
Get a quote for this car
Buick Excelle GT II (2020): 5x105 bolt pattern, 56.6mm center bore. Factory wheels: 15x6J F/R. Flush and max fitment confirmed on request.
Bolt Pattern5x105
Wheel Bolt/NutM12x1.5 Nut
Center Bore56.6mm
Wheel Load Rating650–750 kg/wheel (Standard Passenger Car segment reference)
Caliper TypeFactory caliper package (OEM)
Year2020
CategoryPerformance Sedan
✓ Data check: the bolt pattern and center bore on this page match an independent fitment reference. Last reviewed September 19, 2026. How we verify
Forged Wheel Designs for the Buick Excelle GT II
Every design below is forged to order, so it can be machined to the Buick Excelle GT II's 5x105 bolt pattern and 56.6 mm center bore, with the width and offset calculated for your setup.
Buick OEM-Style Bright Silver 5 W-Spoke Forged Wheels
Monoblock · Bright Silver
Matte Black 10-Spoke Forged Wheels
Off-Road · Matte Black
Matte Black 5-Spoke Deep Lip Forged Wheels
Off-Road · Matte Black
Buick OEM-Style Red 2-Piece Forged Wheels
2-Piece · Red
Gloss Black / Gunmetal Custom Forged Wheels
Monoblock · Gloss Black / Gunmetal
Buick OEM-Style Brushed Silver Slotted Disc Polished Lip Forged Wheels
Monoblock · Brushed Silver
Buick OEM-Style Black / Machined Double-Ring Forged Wheels
Monoblock · Black Machined
How to Read Wheel Offset & Measurements
Use these two references before ordering: the left diagram shows where each spec (PCD, center bore, offset, width and diameter) is measured on the wheel; the right diagram shows how positive, zero and negative offset shift the wheel face relative to the hub centerline.
ANKUSI Engineering Expert Advice
A big saloon lives or dies on ride quality, and the wheel is the first thing that ruins it. Going wider and lower without watching load rating and offset trades away exactly the composure you paid for. Forging lets you add diameter and width while keeping rotating mass close to the factory figure.
We publish the factory specification for the Buick Excelle GT II below. We have not yet been able to verify aftermarket flush or maximum-aggressive offsets for this exact variant against a source we trust, so we are not listing any - an invented offset is worse than no offset when a wheel has to clear a caliper.
Buick Excelle GT II OE Wheel Specs
The 2020 Buick Excelle GT II (Performance Sedan) uses a 5x105 bolt pattern with a 56.6mm center bore. Factory wheels are 15x6J F/R.
Why the factory spec works for most owners:
- Keeps unsprung weight low to preserve the factory handling balance
- Matches the wider, performance-oriented tire sizing typical of this platform
- Maintains clearance for the factory brake package and suspension geometry
- Balances grip with ride comfort for daily and spirited driving
ANKUSI builds these wheels — we are the forging factory, not a reseller. For the Buick Excelle GT II (2020) we drill the 5x105 pattern and cut the centre bore to 56.6mm on our own CNC line, so the wheel hub-centres on the car with no spacer rings, in whatever diameter, width and offset you specify.
Converting these ET figures to backspacing? Use the wheel offset and backspacing calculator.
The figures on this page are part of our open wheel fitment dataset — 10,093 vehicles, free to download, CC BY 4.0.
Aftermarket Fitment: Confirmed on Request
Published aftermarket fitment for this exact variant is still thin, so we have not committed to a flush or maximum-aggressive figure. Our engineering team is still collecting verified data for this variant. In the meantime the factory specification above is accurate and is the safe reference point for ordering.
Need a wheel for this car now? Contact ANKUSI with your target diameter, width and offset and our engineers will confirm the correct forged spec against your brake package before anything is cut. You can also use our Offset & Backspacing Calculator to work through the numbers yourself.
Buick Excelle GT II: Specs by Model Year
| Year | Bolt pattern | Center bore | Factory wheel |
|---|---|---|---|
| 2018 | 5x105 | 56.6 mm | 15x6J |
| 2019 | 5x105 | 56.6 mm | 15x6J |
| 2020 | 5x105 | 56.6 mm | 15x6J |
| 2021 | 5x105 | 56.6 mm | 16x6.5J |
| 2022 | 5x105 | 56.6 mm | 16x6.5J |
| 2023 | 5x105 | 56.6 mm | 16x6.5J |
Bolt pattern and center bore stay the same across all 6 model years in our database (2018–2023).
Vehicles With the Same Hub as the Buick Excelle GT II (5x105, 56.6 mm Bore)
In our database, 35 other vehicle entries from 4 makes use exactly the same 5x105 bolt pattern and 56.6 mm center bore. Factory wheels from these cars bolt on and center on the hub without rings; offset and width still have to be checked.
5x105 is used by 0.6% of the vehicle pages in our English fitment guide (37 of 6,503); 100.0% of those also use a 56.6 mm center bore.
Hub-Centric Rings for a 56.6 mm Center Bore
A wheel with a center bore larger than 56.6 mm needs a hub-centric ring. The most common combinations:
| Wheel bore | Ring size |
|---|---|
| 57.1 mm | 57.1 → 56.6 mm |
| 60.1 mm | 60.1 → 56.6 mm |
| 63.4 mm | 63.4 → 56.6 mm |
| 64.1 mm | 64.1 → 56.6 mm |
| 73.1 mm | 73.1 → 56.6 mm |
ANKUSI forged wheels are bored to exactly 56.6 mm for this vehicle, so no ring is needed.
Frequently Asked Questions
What bolt pattern (PCD) does the Buick Excelle GT II use?
The 2020 Buick Excelle GT II uses a 5x105 bolt pattern.
How many lug bolts does the Buick Excelle GT II use?
The Buick Excelle GT II uses a 5-lug bolt pattern (5x105), so you need a 5-lug forged wheel to bolt straight on.
What is the center bore size on the Buick Excelle GT II?
The Buick Excelle GT II's center bore is 56.6mm. If an aftermarket wheel has a larger center bore than this, hub-centric rings are recommended so the wheel centers on the hub itself rather than relying on the lug bolts alone.
What size are the factory (stock) wheels on the Buick Excelle GT II?
Factory wheels on the Buick Excelle GT II are 15x6J F/R.
Do I need wheel spacers for my Buick Excelle GT II?
No. ANKUSI forges each wheel to your exact target offset, including the flush or max specs above, so you get the correct fitment without stacking spacers. Spacers are typically only used to push out an existing OE-offset wheel without replacing it, which isn't necessary when you're ordering a custom-offset forged wheel.
What's the difference between wheel offset and backspacing?
Offset is the distance in millimeters from the wheel's true centerline to its mounting face (positive offset pulls the wheel in, negative pushes it out). Backspacing is the distance in inches from the mounting face to the back edge of the wheel barrel. They describe the same fitment from two different reference points, which is why ANKUSI lists both above — some shops and tuning guides quote offset, others quote backspacing.
Can I run staggered wheels (different sizes front and rear) on my Buick Excelle GT II?
The Buick Excelle GT II runs the same wheel size front and rear from the factory, so staggered fitment is not required. ANKUSI can still forge a staggered set (wider rear) on request if you want a more aggressive stance.
Sources and Last Update
Data checked against: avtoreference.com.
This record is part of the open ANKUSI Wheel Fitment Dataset (DOI 10.5281/zenodo.23241521, CC BY 4.0).
Other cars on the same factory size: 15x6 wheels · 15 inch wheels.
Compiled by the ANKUSI Wheels engineering team, an IATF 16949 and ISO 9001 certified forged wheel factory in Guangzhou.