Chevrolet Silverado ZR2 Bison (2023) Wheel Fitment
Chevrolet Silverado ZR2 Bison (2023): 6x139.7 bolt pattern, 78.1mm center bore. Factory wheels: 18x8.5J at ET24 offset, front and rear. Reference fitment ranges.
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Wheel Size & Offset at a Glance
| Configuration | Wheel Size & Offset |
|---|---|
| Factory (OE) | 18x8.5J F/R |
| Flush Fitment | 18x9.0J at ET10 offset |
| Maximum Aggressive | 18x9.5J at ET0 offset |
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
On a truck platform, wheel weight sits right at the unsprung mass budget the suspension engineers already spent on payload and towing capacity. A forged wheel keeps that budget intact — same strength, less rotational inertia — instead of eating into the margin the way a cheap cast aftermarket wheel can.
The Chevrolet Silverado ZR2 Bison runs a 6x139.7 bolt pattern, 78.1mm center bore, and a 18x8.5J, front and rear, wheel from the factory. Our Flush Fitment reference is 18x9.0J ET10, which tucks the tire under the fender lip on a stock-height Chevrolet Silverado ZR2 Bison. Our Maximum Aggressive reference is 18x9.5J ET0 — beyond that offset, expect rubbing against the inner fender liner under compression without further trimming.
Chevrolet Silverado ZR2 Bison OE Wheel Specs
The 2023 Chevrolet Silverado ZR2 Bison (Truck) uses a 6x139.7 bolt pattern with a 78.1mm center bore. Factory wheels are 18x8.5J F/R.
Why the factory spec works for most owners:
- Supports higher payload and towing capacity
- Preserves ground clearance for towing, hauling and light off-road use
- Matches tire sizing commonly available for this class of vehicle
- Maintains clearance for the factory suspension and brake package
Flush Fitment
For a flush look, F/R 18x9.0J ET10 is a commonly used starting point — clearance must be verified on a stock or mildly lowered Chevrolet Silverado ZR2 Bison.
Maximum Aggressive Fitment
F/R 18x9.5J ET0 is a more aggressive reference setup. Beyond this, expect rubbing under compression without fender rolling or camber correction.
5-Tier Configuration Options
A Factory-Style 18x8.5J ET24
Recommended setup: 18x8.5J ET24 | Economy impact: Negligible | Best for: Daily commuting, family use
Appearance: 7/10 | Comfort: 9.5/10 | Install difficulty: ★☆☆☆☆
Estimated cost: $450-800 (wheels + tires + install)
B Comfortable Upgrade 18x9.0J ET17
Recommended setup: 18x9.0J ET17 | Economy impact: -2 to -4% | Best for: Daily / street
Appearance: 8/10 | Comfort: 9/10 | Install difficulty: ★☆☆☆☆
Estimated cost: $1,950-2,550 (wheels + tires + install)
C Balanced / Flush Fit 18x9.0J ET10
Recommended setup: 18x9.0J ET10 | Economy impact: -4 to -6% | Best for: Street
Appearance: 8.5/10 | Comfort: 8/10 | Install difficulty: ★★☆☆☆
Estimated cost: $2,600-3,400 (wheels + tires + install)
D Aggressive 18x9.5J ET5
Recommended setup: 18x9.5J ET5 | Economy impact: -6 to -9% | Best for: Show / occasional track
Appearance: 9/10 | Comfort: 6.5/10 | Install difficulty: ★★★☆☆
Estimated cost: $3,900-5,000 (wheels + tires + install)
E Max Aggressive 18x9.5J ET0
Recommended setup: 18x9.5J ET0 | Economy impact: -8 to -12% | Best for: Show only
Appearance: 9.5/10 | Comfort: 4/10 | Install difficulty: ★★★★☆
Estimated cost: $4,800-6,200+ (wheels + tires + install)
Performance Comparison Matrix
| Metric | Tier A | Tier B | Tier C | Tier D | Tier E |
|---|---|---|---|---|---|
| Wheel Spec | 18x8.5J ET24 | 18x9.0J ET17 | 18x9.0J ET10 | 18x9.5J ET5 | 18x9.5J ET0 |
| Economy Impact | Negligible | -2 to -4% | -4 to -6% | -6 to -9% | -8 to -12% |
| Appearance | 7/10 | 8/10 | 8.5/10 | 9/10 | 9.5/10 |
| Comfort | 9.5/10 | 9/10 | 8/10 | 6.5/10 | 4/10 |
| Install Difficulty | ★☆☆☆☆ | ★☆☆☆☆ | ★★☆☆☆ | ★★★☆☆ | ★★★★☆ |
| Cost Range | $450-800 | $1,950-2,550 | $2,600-3,400 | $3,900-5,000 | $4,800-6,200+ |
| Best For | Daily commuting, family use | Daily / street | Street | Show / occasional track | Show only |
Real-World Reference Cases
The examples below are compiled from typical ANKUSI customer configurations and are labeled as reference cases, not individually verified real-world builds.
Case 1: Daily Driver (Factory-Style)
Profile: Everyday driving, prioritizes comfort and low running cost.
Setup: 18x8.5J ET24
Cost: ~$620
Outcome: Minimal visual change, ride and fuel economy essentially unaffected.
Case 2: Balanced Enthusiast (Balanced / Flush Fit)
Profile: Wants a sportier stance without sacrificing daily usability.
Setup: 18x9.0J ET10
Cost: ~$3,000
Outcome: Noticeable visual upgrade, fuel economy drop within the expected range.
Case 3: Show Build (Max Aggressive)
Profile: Built primarily for shows or occasional track/show use.
Setup: 18x9.5J ET0
Cost: ~$5,500
Outcome: Maximum visual impact; daily comfort and fuel economy are heavily compromised, physical test fit required before production.
Decision Guide
Offset & Backspacing Reference
Backspacing is calculated as wheel width (in) ÷ 2 + offset (mm) ÷ 25.4 + 0.5 (flange allowance):
- OE: 18x8.5J ET24 → ~5.69″ backspacing
- Flush: 18x9.0J ET10 → ~5.39″ backspacing
- Max: 18x9.5J ET0 → ~5.25″ backspacing
A Note on Clearance
Final clearance depends on the exact tire model, suspension height, brake package, alignment and vehicle tolerances. A physical test fit is recommended before production.
Want to check a different width or offset before you order? Use our Offset & Backspacing Calculator to solve the numbers yourself, or looking for your exact Chevrolet spec, or want a wheel built to a custom offset for your Chevrolet Silverado ZR2 Bison? Contact ANKUSI with your bolt pattern and offset target and we will confirm the correct forged wheel spec for your build.
Frequently Asked Questions
What bolt pattern (PCD) does the Chevrolet Silverado ZR2 Bison use?
How many lug bolts does the Chevrolet Silverado ZR2 Bison use?
What is the center bore size on the Chevrolet Silverado ZR2 Bison?
What size are the factory (stock) wheels on the Chevrolet Silverado ZR2 Bison?
What is the biggest wheel size I can fit on my Chevrolet Silverado ZR2 Bison without rubbing?
What does a flush wheel fitment look like on the Chevrolet Silverado ZR2 Bison?
Do I need wheel spacers for my Chevrolet Silverado ZR2 Bison?
How do I calculate wheel backspacing for my Chevrolet Silverado ZR2 Bison?
What's the difference between wheel offset and backspacing?
Can I run staggered wheels (different sizes front and rear) on my Chevrolet Silverado ZR2 Bison?
Wheel Installation Reference: Torque, Thread & TPMS
Thread & Fastener: M12x1.5 or M14x1.5, conical-seat lug nut.
Factory Torque Spec: 179-190 Nm (132-140 ft-lb). Shared Silverado 1500/Colorado bolt pattern; exact thread and torque depend on generation, confirm for your specific model year.
TPMS: TPMS (Tire Pressure Monitoring System) has been federally mandated on all new light vehicles sold in the US since the 2008 model year. If your wheels use OE-style sensors, have them transferred or cloned to the new wheels at installation.
Tire Pressure: Always set tire pressure to the value on your vehicle's tire placard (driver's doorjamb or glovebox), not the max PSI printed on the tire sidewall — this is trim- and tire-size-specific and stays the same reference point when you switch to a different wheel and tire combination.
Reference data compiled from published OEM service specifications and cross-checked against independent repair sources; always confirm against your owner's manual or door-jamb placard before installation.