Cadillac Seville STS (2000) Bolt Pattern & Wheel Fitment
Cadillac Seville STS (2000): 5x115 bolt pattern, 70.3mm center bore. Factory wheels: 16x7.0J F/R. Reference fitment ranges.
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Wheel Size & Offset at a Glance
| Configuration | Wheel Size & Offset |
|---|---|
| Factory (OE) | 16x7.0J F/R |
| Flush Fitment | 18x8.0J at ET40 offset |
| Maximum Aggressive | 19x8.5J at ET35 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
The Cadillac Seville STS's factory wheel spec reflects a deliberate balance between comfort, steering feel and durability that the engineering team tuned for. Forging lets ANKUSI match that same strength target while trimming rotational mass — the part of a wheel upgrade that actually changes how the car drives, not just how it looks.
The Cadillac Seville STS runs a 5x115 bolt pattern, 70.3mm center bore, and a 16x7.0J, front and rear, wheel from the factory. Our Flush Fitment reference is 18x8.0J ET40, which tucks the tire under the fender lip on a stock-height Cadillac Seville STS. Our Maximum Aggressive reference is 19x8.5J ET35 — beyond that offset, expect rubbing against the inner fender liner under compression without further trimming.
Cadillac Seville STS OE Wheel Specs
The 2000 Cadillac Seville STS (Sedan) uses a 5x115 bolt pattern with a 70.3mm center bore. Factory wheels are 16x7.0J F/R.
Why the factory spec works for most owners:
- Balances ride comfort with everyday fuel efficiency
- A widely used size in this segment, so tire and wheel availability stays strong
- Keeps unsprung weight low for stable, predictable handling
- Maintains clearance for the factory brake calipers and suspension components
ANKUSI builds these wheels — we are the forging factory, not a reseller. For the Cadillac Seville STS (2000) we drill the 5x115 pattern and cut the centre bore to 70.3mm 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 — 6,436 vehicles, free to download, CC BY 4.0.
Flush Fitment
For a flush look with minimal rubbing, F/R 18x8.0J ET40 is the recommended starting point on a stock or mildly lowered Cadillac Seville STS.
Maximum Aggressive Fitment
F/R 19x8.5J ET35 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 16x7.0J ET51
Recommended setup: 16x7.0J ET51 | 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 18x7.5J ET46
Recommended setup: 18x7.5J ET46 | 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 18x8.0J ET40
Recommended setup: 18x8.0J ET40 | 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 19x8.5J ET38
Recommended setup: 19x8.5J ET38 | 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 19x8.5J ET35
Recommended setup: 19x8.5J ET35 | 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 | 16x7.0J ET51 | 18x7.5J ET46 | 18x8.0J ET40 | 19x8.5J ET38 | 19x8.5J ET35 |
| 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: 16x7.0J ET51
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: 18x8.0J ET40
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: 19x8.5J ET35
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: 16x7.0J ET51 → ~6.01″ backspacing
- Flush: 18x8.0J ET40 → ~6.07″ backspacing
- Max: 19x8.5J ET35 → ~6.13″ backspacing
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 Cadillac spec, or want a wheel built to a custom offset for your Cadillac Seville STS? Contact ANKUSI with your bolt pattern and offset target and we will confirm the correct forged wheel spec for your build.
Custom Forged Wheels for the Cadillac Seville STS (2000)
Everything above is reference data. If you want wheels actually built to it, that is what ANKUSI does: we are a forged wheel factory in Guangzhou, China, IATF 16949 and ISO 9001 certified, forging on our own 10,000-ton press and producing over 120,000 wheels a year. Forging blank, CNC machining, finishing, coating and inspection all happen in the same building — nothing is subcontracted and nothing is relabelled from another manufacturer.
Every set is cut to order, so the 5x115 pattern and the 70.3mm centre bore are machined for this car specifically rather than shimmed with adaptor rings. Diameter, width, offset, concavity, monoblock or multi-piece construction and the finish are all yours to choose — most Cadillac orders on this platform land somewhere between the 18x8.0J ET40 flush setup and the 19x8.5J ET35 aggressive setup referenced above.
Designs we already tool for the 5x115 pattern — each one is re-cut to your sizes and offsets:
Matte Silver Forged Wheels – Cadillac CT5 / Cadillac Escalade Fitment (6-Lug)
Ford Mustang Style Light Gunmetal / Gray 5 Y-Spoke Forged Wheels – Ford Mustang / Chevrolet Corvette Fitment (5-Lug)
Belak Matte Silver Deep Lip Riveted Forged Wheels – Chevrolet Corvette / Ford Mustang Fitment (5-Lug)
Weld-Weld Matte Silver 5 V-Spoke Forged Wheels – Ford Mustang / Chevrolet Corvette Fitment (5-Lug)