2018 BMW BMW i3 — Base Model
The 2018 BMW BMW i3 Base Model shipped with 4 different factory tire sizes, depending on the wheel package it left the factory with (this can also reflect a staggered front/rear setup). Check your tire sidewall or door placard to confirm which one applies to your vehicle.
This trim shipped with more than one tire size (staggered fitment, front/rear, or optional wheel package). Confirm which one matches your vehicle by checking your tire sidewall or door placard.
155/70R19
| Section width | 155 mm |
|---|---|
| Aspect ratio (sidewall height) | 70% (108.5 mm) |
| Rim diameter | 19" |
| Overall tire diameter | ~27.5" |
| Revolutions per mile | ~732 |
- Check 155/70R19 price at TireRack
- Check 155/70R19 price at SimpleTire
- Check 155/70R19 price at Priority Tire
Some links on this page are affiliate links — see our disclosure.
175/60R19
| Section width | 175 mm |
|---|---|
| Aspect ratio (sidewall height) | 60% (105 mm) |
| Rim diameter | 19" |
| Overall tire diameter | ~27.3" |
| Revolutions per mile | ~740 |
- Check 175/60R19 price at TireRack
- Check 175/60R19 price at SimpleTire
- Check 175/60R19 price at Priority Tire
Some links on this page are affiliate links — see our disclosure.
155/60R20
| Section width | 155 mm |
|---|---|
| Aspect ratio (sidewall height) | 60% (93 mm) |
| Rim diameter | 20" |
| Overall tire diameter | ~27.3" |
| Revolutions per mile | ~738 |
- Check 155/60R20 price at TireRack
- Check 155/60R20 price at SimpleTire
- Check 155/60R20 price at Priority Tire
Some links on this page are affiliate links — see our disclosure.
175/55R20
| Section width | 175 mm |
|---|---|
| Aspect ratio (sidewall height) | 55% (96.3 mm) |
| Rim diameter | 20" |
| Overall tire diameter | ~27.6" |
| Revolutions per mile | ~731 |
- Check 175/55R20 price at TireRack
- Check 175/55R20 price at SimpleTire
- Check 175/55R20 price at Priority Tire
Some links on this page are affiliate links — see our disclosure.
Other 2018 BMW BMW i3 trims
- Base Model with Range Extender 155/70R19 / 175/60R19 / 155/60R20 / 175/55R20
- S 175/55R20 / 195/50R20
- S with Range Extender 175/55R20 / 195/50R20
How to read a tire size
A tire size like 225/45R17 breaks down into three parts:
the first number is the section width in millimeters
(the tire's width from sidewall to sidewall), the second is the
aspect ratio — the sidewall's height as a percentage of
that width — and the number after the "R" is the rim
diameter in inches. A letter prefix (P or LT) indicates
Passenger or Light Truck construction; its absence usually means
Euro-metric sizing.
Some trucks and off-road tires instead use "flotation" sizing, like
37X12.50R17 — here the numbers are the tire's overall
diameter and width in inches directly, with the rim diameter last.
Always verify against the tire information placard on your driver's-side door jamb or your owner's manual before purchasing — tire size can vary by factory option package even within the same trim.