2021 BMW i3 Wheel Interchange
tl;dr
Keep the BMW i3 (2021) wheel and tire close to OEM specs. The car uses 19x5.0 wheels, 5x112 lugs, 66.6mm center bore, M14x1.25 threads, ET43 offset and 155/70R19 tires. Use the on-page calculator to check alternate sizes. Confirm any missing or trim-specific values with OEM sources before buying.
Recommendation
Follow these steps in order. They reflect the lifecycle from planning to road verification.
- Plan: target wheels that match 5x112 bolt pattern and 66.6mm bore.
- Select: prefer 19x5.0 wheels with ET43 for plug-and-play fitment.
- Verify: use the on-page wheel/tire calculator to model changes.
- Buy: choose hub-centric rings if the replacement wheel bore differs.
- Install: use a calibrated torque wrench and quality jack stands.
- Confirm: inspect clearance, ABS/TPMS function and perform a test drive.
If you plan a non-OEM wheel width or offset, model it first. The calculator shows wheel and tire diameter differences instantly.
Impact
Changing wheel or tire size affects handling, ride and dash instruments. Small offset shifts change scrub radius and steering feel. Wider rims or taller tires can contact suspension or bodywork. Diameter changes affect speedometer and gearing. Proper hub fit and lug seat type control vibration and safety. Using OEM-equivalent dimensions preserves factory performance and systems integration.
| OEM spec | Value |
|---|---|
| Bolt pattern | 5x112 |
| Center bore | 66.6 mm |
| Thread size | M14 x 1.25 |
| Rim diameter | 19 in |
| Rim width | 5.0 in |
| Offset (ET) | 43 mm |
| Backspacing | 4.19 in |
| Tire | 155/70R19 |
Risks
Be aware of common gotchas and safety risks.
- Rubbing: wider wheels or lower offset may hit calipers or fenders.
- Incorrect lug seat: seat shape can differ by aftermarket wheel.
- Hub mismatch: larger bore wheels require rings for centering.
- TPMS and ABS: sensors and calibration can be affected by tire diameter changes.
- Load rating: aftermarket wheels must meet or exceed OEM load requirements. If unknown, verify with OEM.
- Torque and studs: use correct M14x1.25 lug torque and inspect stud condition.
If any trim-specific values are unknown, confirm them with the owner’s manual, the door placard, or a BMW dealer. Use the on-page calculator to compare designs before purchase.
Next actions
Here is a compact checklist and the next steps to execute.
- Checklist: note bolt pattern, bore, thread size, width, offset and tire size.
- Use the on-page calculator: compare donor wheels versus installed wheels.
- Measure: verify brake clearance and lug seat type on your vehicle.
- Order parts: hub-centric rings, appropriate lug nuts and TPMS sensors if needed.
- Tools: get a calibrated torque wrench and rated jack stands for safe install.
- Install: torque to OEM spec, then perform alignment and road test.
- Confirm: monitor for vibration, rubbing, and accurate speedometer readings.
Recommended tool searches on Amazon.
Next steps: run the on-page calculator now. Then confirm any missing OEM values with official sources. Proceed to purchase and install with the checklist in hand.
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