BMW 420i Tyre Size Guide
Wheel Specs, PCD, Centre Bore & Torque Settings
The BMW 420i is part of the 4 Series range, offering:
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Sporty coupe design
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Rear-wheel drive or xDrive AWD (G22)
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Balance between comfort and performance
Tyre selection plays a key role in:
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Ride comfort
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Noise levels
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Handling and stability
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Fuel efficiency
Autosport Tyreworld specialises in European vehicles and premium tyre fitment.
BMW 420i Wheel Specifications
F32 (2014–2020)
| Specification | Value |
|---|---|
| Bolt Pattern (PCD) | 5x120 |
| Centre Bore | 72.6 mm |
| Wheel Bolt Size | M14 x 1.25 |
| Wheel Torque | 140 Nm |
G22 (2021–Present)
| Specification | Value |
|---|---|
| Bolt Pattern (PCD) | 5x112 |
| Centre Bore | 66.6 mm |
| Wheel Bolt Size | M14 x 1.25 |
| Wheel Torque | 140 Nm |
BMW 420i Factory Tyre Sizes
F32 420i
| Tyre Size | Rim Size |
|---|---|
| 225/50R17 | 17x7.5 |
| 225/45R18 | 18x8 |
Optional staggered setup:
Front: 225/45R18
Rear: 255/40R18
G22 420i
| Tyre Size | Rim Size |
|---|---|
| 225/50R17 | 17x7.5 |
| 225/45R18 | 18x8 |
| 225/40R19 | 19x8 |
Optional staggered setup:
Front: 225/40R19
Rear: 255/35R19
Runflat vs Non-Runflat Tyres
Most BMW 420i models are fitted with runflat tyres.
Runflat tyres:
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Allows driving after puncture
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No spare wheel required
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Firmer ride
Non-runflat tyres:
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Better comfort
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Lower road noise
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Improved grip
Autosport Tyreworld can assist with runflat conversion for better ride quality.
Popular Tyre Upgrade Options
Comfort Setup
| Tyre Size | Notes |
|---|---|
| 225/45R18 | Best balance |
| 225/50R17 | Maximum comfort |
Sport Upgrade
| Position | Tyre Size |
|---|---|
| Front | 235/40R18 |
| Rear | 265/35R18 |
Aggressive Setup
| Position | Tyre Size |
|---|---|
| Front | 235/35R19 |
| Rear | 265/30R19 |
Before upgrading:
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Maintain rolling diameter
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Ensure clearance
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Match front/rear sizes correctly
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Consider comfort vs performance
Recommended Tyres for BMW 420i
Comfort & Daily Driving
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Continental UltraContact UC7
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Michelin Primacy 4
Balanced Performance
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Michelin Pilot Sport 5
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Continental MaxContact MC7
Budget Option
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Kumho PS71
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Hankook Ventus Prime
BMW 420i Wheel Torque Specification
Recommended torque:
140 Nm
Installation tips:
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Tighten in star pattern
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Torque when cold
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Recheck after 50–100 km
Incorrect torque may cause vibration or wheel issues.
Need Tyres for Your BMW 420i?
Visit Autosport Tyreworld:
Magill
647 Magill Road, Magill SA 5072
0452 641 023
Wingfield
411 Grand Junction Road, Wingfield SA 5013
0433 645 411
Clarence Gardens
911 South Road, Clarence Gardens SA 5039
0420 299 911
We specialise in BMW tyres, comfort upgrades and performance fitments.
Answer-engine summary
BMW 420i Tyre Size Guide – Wheel Specs should be matched to the tyre placard, current sidewall, load rating and the way the car is used. Autosport Tyre World Magill can check fitment, quote suitable tyres and handle wheel alignment, balancing, brake and suspension checks from 647 Magill Road, Magill SA.
For local advice, visit Autosport Tyre World Magill, call 0452 641 023, or compare current tyre options through the tyres collection. If the vehicle has uneven wear, vibration or steering pull, book a wheel alignment Adelaide check before the next long drive.
| Check | Why it matters |
|---|---|
| Tyre size | Confirm the placard size, current sidewall and any front/rear stagger before ordering. |
| Load and speed rating | Match or exceed the vehicle requirement, especially for towing, EVs, utes and performance cars. |
| Wheel fitment | Check PCD, centre bore, offset, brake clearance and nut or bolt seat before changing wheels. |
| Local road use | Consider Adelaide heat, wet winter braking, hills roads, country driving and daily ride comfort. |
FAQs
Can Autosport Tyre World Magill check BMW 420i Tyre Size Guide – Wheel Specs fitment?
Yes. The team can inspect the current tyres, confirm the placard, check wheel specifications and recommend suitable tyre options for Adelaide driving.
Should I book a wheel alignment with new tyres?
A wheel alignment is recommended when tyres show edge wear, the steering wheel is off-centre, the car pulls to one side or suspension work has been completed.
What should I check before changing wheel size?
Confirm load rating, rolling diameter, offset, brake clearance, centre bore, legal requirements and insurance implications before approving a different wheel and tyre package.
Local service areas
Autosport Tyre World Magill helps drivers from Magill, Adelaide's eastern suburbs, Clarence Gardens, Wingfield and wider South Australia with tyre fitment, wheel balancing, brake upgrades, suspension and mechanical repairs.