BMW 325i Cabrio (1985) Wheel Fitment
BMW 325i Cabrio (1985): 4x100 bolt pattern, 57.1mm center bore. Factory wheels: 14x6.0J F/R. Reference fitment ranges.
✓ 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) | 14x6.0J F/R |
| Flush Fitment | 16x8.0J at ET20 offset |
| Maximum Aggressive | 16x9.0J 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
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 BMW 325i Cabrio runs a 4x100 bolt pattern, 57.1mm center bore, and a 14x6.0J, front and rear, wheel from the factory. Our Flush Fitment reference is 16x8.0J ET20, which tucks the tire under the fender lip on a stock-height BMW 325i Cabrio. Our Maximum Aggressive reference is 16x9.0J ET15 — beyond that offset, expect rubbing against the inner fender liner under compression without further trimming.
BMW 325i Cabrio OE Wheel Specs
The 1985 BMW 325i Cabrio (Convertible) uses a 4x100 bolt pattern with a 57.1mm center bore. Factory wheels are 14x6.0J F/R.
Why the factory spec works for most owners:
- Matches the chassis tuning used to help offset reduced structural rigidity
- Balances ride comfort with the sportier character typical of this body style
- Keeps unsprung weight low for stable handling
- Maintains clearance for the factory brake package and suspension components
Flush Fitment
For a flush look with minimal rubbing, F/R 16x8.0J ET20 is the recommended starting point on a stock or mildly lowered BMW 325i Cabrio.
Maximum Aggressive Fitment
F/R 16x9.0J 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 14x6.0J ET24
Recommended setup: 14x6.0J 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 15x7.0J ET22
Recommended setup: 15x7.0J 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 16x8.0J ET20
Recommended setup: 16x8.0J 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 16x8.5J ET18
Recommended setup: 16x8.5J 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 16x9.0J ET15
Recommended setup: 16x9.0J 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 | 14x6.0J ET24 | 15x7.0J ET22 | 16x8.0J ET20 | 16x8.5J ET18 | 16x9.0J 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: 14x6.0J 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: 16x8.0J 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: 16x9.0J 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: 14x6.0J ET24 → ~4.44″ backspacing
- Flush: 16x8.0J ET20 → ~5.29″ backspacing
- Max: 16x9.0J ET15 → ~5.59″ 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 BMW spec, or want a wheel built to a custom offset for your BMW 325i Cabrio? 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 BMW 325i Cabrio use?
How many lug bolts does the BMW 325i Cabrio use?
What is the center bore size on the BMW 325i Cabrio?
What size are the factory (stock) wheels on the BMW 325i Cabrio?
What is the biggest wheel size I can fit on my BMW 325i Cabrio without rubbing?
What does a flush wheel fitment look like on the BMW 325i Cabrio?
Do I need wheel spacers for my BMW 325i Cabrio?
How do I calculate wheel backspacing for my BMW 325i Cabrio?
What's the difference between wheel offset and backspacing?
Can I run staggered wheels (different sizes front and rear) on my BMW 325i Cabrio?
Wheel Installation Reference: Torque, Thread & TPMS
Thread & Fastener: M14x1.25, 60-degree conical-seat lug bolt.
Factory Torque Spec: 140 Nm (103 ft-lb). Consistent across modern BMW passenger and X-series models using factory conical-seat bolts.
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.