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1999 Carlsson Mercedes-Benz SL Wheels & Rims: Bolt Pattern, Offset & Sizes
Fitting Carlsson Mercedes-Benz SL wheels? This page gives the 1999 Carlsson Mercedes-Benz SL bolt pattern (5x112), centre bore, factory rim size and the offset range for aftermarket and forged Carlsson Mercedes-Benz SL rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.
Carlsson Mercedes-Benz SL (1999): 5x112 bolt pattern, 66.6mm center bore. Factory wheels: F: 18x8.5J R: 18x10.0J. Reference fitment ranges.
Bolt Pattern5x112
Wheel Bolt/NutM14x1.5 Bolt
Center Bore66.6mm
Wheel Load Rating650–750 kg/wheel (Standard Passenger Car segment reference)
Year1999
CategoryRoadster
✓ Verified by ANKUSI's Engineering Team — IATF 16949 & ISO 9001 certified forged wheel manufacturer, TÜV/SFI/VIA compliant. See our factory & certifications →
Wheel Size & Offset at a Glance
| Configuration | Wheel Size & Offset |
|---|---|
| Factory (OE) | F: 18x8.5J R: 18x10.0J |
| Flush Fitment | F 18x9.0J ET20 / R 18x10.5J ET18 |
| Maximum Aggressive | F 19x9.5J ET15 / R 19x11.0J ET15 |
Forged wheels for the Carlsson Mercedes-Benz SLMachined to the 5x112 bolt pattern and 66.6 mm bore · 14–24 inch · offset calculated for your car · 3D drawing before production
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
Convertibles lose some of the structural rigidity a fixed roof provides, which means the suspension and wheels end up doing more of the work to keep the chassis composed. A forged wheel keeps unsprung mass down without sacrificing the strength margin the factory built in — useful on a platform that's already managing extra flex.
The Carlsson Mercedes-Benz SL runs a 5x112 bolt pattern, 66.6mm center bore, and a F: 18x8.5J wheel from the factory. Our Flush Fitment reference is F 18x9.0J ET20 / R 18x10.5J ET18, which tucks the tire under the fender lip on a stock-height Carlsson Mercedes-Benz SL. Our Maximum Aggressive reference is F 19x9.5J ET15 / R 19x11.0J ET15 — beyond that offset, expect rubbing against the inner fender liner under compression without further trimming.
Carlsson Mercedes-Benz SL OE Wheel Specs
The 1999 Carlsson Mercedes-Benz SL (Roadster) uses a 5x112 bolt pattern with a 66.6mm center bore. Factory wheels are F: 18x8.5J R: 18x10.0J.
Why the factory spec works for most owners:
- Keeps the factory ride quality and noise levels intact
- A common fitment for this class, so replacement tires are easy to source
- Preserves clearance around the OE brakes and suspension geometry
- Delivers predictable, easy-to-live-with handling for daily use
ANKUSI builds these wheels — we are the forging factory, not a reseller. For the Carlsson Mercedes-Benz SL (1999) we drill the 5x112 pattern and cut the centre bore to 66.6mm 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 — 6,436 vehicles, free to download, CC BY 4.0.
Flush Fitment
For a flush look with minimal rubbing, F 18x9.0J ET20 / R 18x10.5J ET18 is the recommended starting point on a stock or mildly lowered Carlsson Mercedes-Benz SL.
Maximum Aggressive Fitment
F 19x9.5J ET15 / R 19x11.0J 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 F 18x8.5J ET25 / R 18x10.0J ET25
Recommended setup: F 18x8.5J ET25 / R 18x10.0J ET25 | Economy impact: Negligible | Best for: Daily commuting, family use
Appearance: 7/10 | Comfort: 9.5/10 | Install difficulty: ★☆☆☆☆
Estimated cost: $1,200-1,500 (wheels + tires + install)
B Comfortable Upgrade F 18x9.0J ET23 / R 18x10.5J ET22
Recommended setup: F 18x9.0J ET23 / R 18x10.5J ET22 | 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 F 18x9.0J ET20 / R 18x10.5J ET18
Recommended setup: F 18x9.0J ET20 / R 18x10.5J ET18 | 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 F 19x9.5J ET18 / R 19x11.0J ET17
Recommended setup: F 19x9.5J ET18 / R 19x11.0J ET17 | 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 F 19x9.5J ET15 / R 19x11.0J ET15
Recommended setup: F 19x9.5J ET15 / R 19x11.0J 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 | F 18x8.5J ET25 / R 18x10.0J ET25 | F 18x9.0J ET23 / R 18x10.5J ET22 | F 18x9.0J ET20 / R 18x10.5J ET18 | F 19x9.5J ET18 / R 19x11.0J ET17 | F 19x9.5J ET15 / R 19x11.0J 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 | $1,200-1,500 | $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: F 18x8.5J ET25 / R 18x10.0J ET25
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: F 18x9.0J ET20 / R 18x10.5J ET18
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: F 19x9.5J ET15 / R 19x11.0J ET15
Cost: ~$5,500
Outcome: Maximum visual impact; daily comfort and fuel economy are heavily compromised, physical test fit required before production.
Decision Guide
1
What's your primary use? Daily commuting → Tier A/B. Weekend street driving → Tier B/C. Show or occasional track use → Tier D/E.
2
What's your budget? Under $800 → Tier A. $800-3,400 → Tier B/C. $3,400+ → Tier D/E.
3
How much does fuel economy matter? Very important → Tier A. Somewhat important → Tier B/C. Not a priority → Tier D/E.
4
Still unsure? Tier C (Balanced / Flush Fit) is the default choice for most Carlsson Mercedes-Benz SL owners.
Offset & Backspacing Reference
Backspacing is calculated as wheel width (in) ÷ 2 + offset (mm) ÷ 25.4 + 0.5 (flange allowance):
- OE: F 18x8.5J ET25 → ~5.73″ F backspacing, R 18x10.0J ET25 → ~6.48″ R backspacing
- Flush: F 18x9.0J ET20 → ~5.79″ F backspacing, R 18x10.5J ET18 → ~6.46″ R backspacing
- Max: F 19x9.5J ET15 → ~5.84″ F backspacing, R 19x11.0J ET15 → ~6.59″ R 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 Carlsson Mercedes-Benz spec, or want a wheel built to a custom offset for your Carlsson Mercedes-Benz SL? 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 Carlsson Mercedes-Benz SL (1999)
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 5x112 pattern and the 66.6mm 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.
Designs we already tool for the 5x112 pattern — each one is re-cut to your sizes and offsets:
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WF R2-Style Full Polished Silver 10-Spoke Y-Design Forged Wheels – BMW M3 CS Handschalter Fitment (19-21in, 5x112)
EKK Clear Black Tint 15-Spoke Forged Wheels – BMW M3 CS Handschalter Fitment (19-22in, 5x112)Frequently Asked Questions
What bolt pattern (PCD) does the Carlsson Mercedes-Benz SL use?
The 1999 Carlsson Mercedes-Benz SL uses a 5x112 bolt pattern.
How many lug bolts does the Carlsson Mercedes-Benz SL use?
The Carlsson Mercedes-Benz SL uses a 5-lug bolt pattern (5x112), so you need a 5-lug forged wheel to bolt straight on.
What is the center bore size on the Carlsson Mercedes-Benz SL?
The Carlsson Mercedes-Benz SL's center bore is 66.6mm. 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 Carlsson Mercedes-Benz SL?
Factory wheels on the Carlsson Mercedes-Benz SL are F: 18x8.5J R: 18x10.0J.
What is the biggest wheel size I can fit on my Carlsson Mercedes-Benz SL without rubbing?
The most aggressive fitment we recommend without fender work is F 19x9.5J ET15 / R 19x11.0J ET15. Going beyond this typically causes rubbing under compression unless you roll the fenders or add camber correction.
What does a flush wheel fitment look like on the Carlsson Mercedes-Benz SL?
For a flush look with minimal to no rubbing, we recommend F 18x9.0J ET20 / R 18x10.5J ET18 as a starting point on a stock or mildly lowered Carlsson Mercedes-Benz SL.
Do I need wheel spacers for my Carlsson Mercedes-Benz SL?
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.
How do I calculate wheel backspacing for my Carlsson Mercedes-Benz SL?
Backspacing (in inches) = wheel width (in) ÷ 2 + offset (mm) ÷ 25.4 + 0.5 (flange allowance). For example, the flush spec above works out to roughly 5.79" backspacing up front and 6.46" in the rear.
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 Carlsson Mercedes-Benz SL?
Yes — the Carlsson Mercedes-Benz SL's factory and our recommended flush/max fitments already use staggered sizing (different width front and rear), and ANKUSI can forge matching staggered sets to your target offsets.
Vehicles With the Same Hub as the Carlsson Mercedes-Benz SL (5x112, 66.6 mm Bore)
In our database, 820 other vehicle entries from 21 makes use exactly the same 5x112 bolt pattern and 66.6 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.
5x112 is used by 21.9% of the vehicle entries in our database (1,403 of 6,396); 58.6% of those also use a 66.6 mm center bore.
Carlsson Mercedes-Benz SL: Specs by Model Year
| Year | Bolt pattern | Center bore | Factory wheel |
|---|---|---|---|
| 1999 | 5x112 | 66.6 mm | 18x8.5J |
| 2003 | 5x112 | 66.6 mm | 20x9J |
Bolt pattern and center bore stay the same across all 2 model years in our database (1999–2003).
Hub-Centric Rings for a 66.6 mm Center Bore
A wheel with a center bore larger than 66.6 mm needs a hub-centric ring. The most common combinations:
| Wheel bore | Ring size |
|---|---|
| 67.1 mm | 67.1 → 66.6 mm |
| 70.1 mm | 70.1 → 66.6 mm |
| 70.5 mm | 70.5 → 66.6 mm |
| 71.6 mm | 71.6 → 66.6 mm |
| 73.1 mm | 73.1 → 66.6 mm |
ANKUSI forged wheels are bored to exactly 66.6 mm for this vehicle, so no ring is needed.
Sources and Last Update
Data checked against: avtoreference.com, tirewheelguide.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: 18x8.5 wheels · 18 inch wheels.
Compiled by the ANKUSI Wheels engineering team, an IATF 16949 and ISO 9001 certified forged wheel factory in Guangzhou.
Forged Wheel Designs for the Carlsson Mercedes-Benz SL
Every design below is forged to order, so it can be machined to the Carlsson Mercedes-Benz SL's 5x112 bolt pattern and 66.6 mm center bore, with the width and offset calculated for your setup.
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Bolt pattern and center bore on this page were cross-checked against at least two independent sources before publication. Last reviewed 2026-09-18. Spotted an error? Email info@ankusi.com and we will verify and correct it.