Chevrolet Colorado LS Z71 Extended (2004) Wheel Fitment
Chevrolet Colorado LS Z71 Extended (2004): 6x139.7 bolt pattern, 100.3mm center bore. OE 15x7.0J ET47 F/R. Reference fitment ranges.
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Wheel Size & Offset at a Glance
| Configuration | Wheel Size & Offset |
|---|---|
| Factory (OE) | 15x7.0J F/R |
| Flush Fitment | 17x8.0J at ET20 offset |
| Maximum Aggressive | 18x9.0J at ET15 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
Trucks live and die on unsprung weight and load capacity — every pound added at the wheel is a pound the suspension has to control over every bump, fully loaded or not. Forging the wheel instead of casting it lets us hold the factory load rating while cutting rotational mass, which pays off directly in ride quality and steering response on a vehicle that spends real time towing or hauling.
The Chevrolet Colorado LS Z71 Extended runs a 6x139.7 bolt pattern, 100.3mm center bore, and a 15x7.0J, front and rear, wheel from the factory. Our Flush Fitment reference is 17x8.0J ET20, which tucks the tire under the fender lip on a stock-height Chevrolet Colorado LS Z71 Extended. Our Maximum Aggressive reference is 18x9.0J ET15 — beyond that offset, expect rubbing against the inner fender liner under compression without further trimming.
Chevrolet Colorado LS Z71 Extended OE Wheel Specs
The 2004 Chevrolet Colorado LS Z71 Extended (Truck) uses a 6x139.7 bolt pattern with a 100.3mm center bore. Factory wheels are 15x7.0J 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 17x8.0J ET20 is a commonly used starting point — clearance must be verified on a stock or mildly lowered Chevrolet Colorado LS Z71 Extended.
Maximum Aggressive Fitment
F/R 18x9.0J ET15 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 15x7.0J ET47
Recommended setup: 15x7.0J ET47 | 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 16x7.5J ET27
Recommended setup: 16x7.5J ET27 | 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 17x8.0J ET20
Recommended setup: 17x8.0J ET20 | 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 18x8.5J ET18
Recommended setup: 18x8.5J ET18 | 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 18x9.0J ET15
Recommended setup: 18x9.0J ET15 | 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 | 15x7.0J ET47 | 16x7.5J ET27 | 17x8.0J ET20 | 18x8.5J ET18 | 18x9.0J ET15 |
| 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: 15x7.0J ET47
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: 17x8.0J ET20
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: 18x9.0J ET15
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: 15x7.0J ET47 → ~5.3″ backspacing
- Flush: 17x8.0J ET20 → ~5.29″ backspacing
- Max: 18x9.0J ET15 → ~5.59″ 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 Colorado LS Z71 Extended? 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 Colorado LS Z71 Extended use?
How many lug bolts does the Chevrolet Colorado LS Z71 Extended use?
What is the center bore size on the Chevrolet Colorado LS Z71 Extended?
What size are the factory (stock) wheels on the Chevrolet Colorado LS Z71 Extended?
What is the biggest wheel size I can fit on my Chevrolet Colorado LS Z71 Extended without rubbing?
What does a flush wheel fitment look like on the Chevrolet Colorado LS Z71 Extended?
Do I need wheel spacers for my Chevrolet Colorado LS Z71 Extended?
How do I calculate wheel backspacing for my Chevrolet Colorado LS Z71 Extended?
What's the difference between wheel offset and backspacing?
Can I run staggered wheels (different sizes front and rear) on my Chevrolet Colorado LS Z71 Extended?
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: Vehicles built before the 2008 model year were not federally required to carry factory TPMS in the US, though many manufacturers adopted it earlier; verify whether your specific build has TPMS before ordering sensor-compatible wheels.
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.