The 2021 BMW i3 stands apart from most modern hatchbacks, pairing compact city-car proportions with a distinctive electric-vehicle layout and a strong emphasis on efficiency. Its tall, narrow tires are a major part of that character, influencing both appearance and rolling behavior in a way that differs from conventional compact cars. For this exact i3, the primary fitments are radial metric sizes in both 19-inch and 20-inch applications, with narrower front and wider rear sizes on staggered setups. That makes tire selection less about broad experimentation and more about confirming the exact wheel and axle position so the car keeps its intended stance, balance, and road manners.
Which Tire Size Is Right for The 2021 BMW i3
The 2021 BMW i3 uses four primary tire sizes, and the right one depends on both wheel diameter and position on the car. Some configurations use 19-inch tires, while others use 20-inch tires, with separate front and rear sizing on staggered setups. Before choosing a tire, confirm whether the car is a Base or Range Extender configuration and then verify front versus rear fitment along with the actual wheel diameter on the vehicle.
Fit(s): Base, Base Front, and Range Extender Front
Construction: Radial|Rim: 19 in
155/70R19 is a metric radial size with a 155 millimeter section width, a 70-series aspect ratio, radial construction, and a 19-inch rim diameter. On the 2021 BMW i3, this size is used in 19-inch front applications and also appears on the Base sub-model fitment, making it one of the key sizes to identify correctly before replacement. Its narrow profile is part of the i3's efficiency-focused tire strategy rather than a conventional compact-car setup. This size should be chosen only after confirming that the vehicle is running the 19-inch wheel package and that the tire is intended for the front or single listed application.
155/60R20 is a metric radial size that combines a 155 millimeter section width with a lower 60-series profile on a 20-inch rim. On the 2021 BMW i3, it serves as a front fitment for 20-inch staggered setups, where the narrow front tire works with a different rear size rather than matching all four corners. Compared with more familiar passenger-car sizes, the code reflects a very specific wheel-and-axle application. This is the right size to evaluate when the i3 has 20-inch front wheels and the goal is to preserve the intended front fitment rather than substitute a more common but incorrect size.
175/55R20 is a metric radial size with a 175 millimeter section width, a 55-series profile, radial construction, and a 20-inch rim diameter. On the 2021 BMW i3, this is the corresponding rear fitment for 20-inch staggered applications, so it should be treated as a rear-specific size rather than a universal i3 tire. The wider section relative to the front tire is part of the car's front-to-rear setup and should not be mixed casually across axle positions. Choose this size only after confirming that the vehicle uses the 20-inch package and that the tire being replaced is on the rear axle.
175/60R19 is a metric radial size that pairs a 175 millimeter section width with a 60-series profile on a 19-inch rim. On the 2021 BMW i3, it is used as the rear tire in 19-inch staggered configurations, complementing the narrower 155/70R19 front size rather than replacing it. That distinction matters because the i3 does not use a one-size-fits-all approach across every wheel and axle position. This size belongs in the conversation when the car has 19-inch rear wheels and the owner wants to keep the intended rear fitment, balance, and wheel compatibility intact.
Sub-model fitment on the 2021 BMW i3 is not one-size-fits-all, because tire choice can depend on wheel diameter as well as front versus rear position. Checking the exact sub-model name matters here, especially on staggered configurations where the front and rear tires are intentionally different.
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2021 BMW i3 Base
The 2021 BMW i3 Base uses a 155/70R19 radial fitment in the covered listing, making it the most straightforward starting point on this page. Tire selection still depends on confirming the actual wheel setup on the car, especially if the vehicle has been changed from its original 19-inch arrangement.
The 2021 BMW i3 Base Front appears with two front fitment paths, one using 155/70R19 and another using 155/60R20. That means the first step is confirming whether the car has 19-inch or 20-inch front wheels before comparing replacement tires.
The 2021 BMW i3 Base Rear uses either 175/60R19 or 175/55R20, depending on the wheel package installed on the vehicle. Rear tire selection should follow the actual rear wheel diameter and should stay matched to the corresponding front-and-rear staggered setup.
The 2021 BMW i3 Range Extender Front shares the same front-size pattern as the Base Front, using either 155/70R19 or 155/60R20. Choosing correctly starts with verifying wheel diameter, since the two front sizes belong to different wheel packages rather than interchangeable front fitments.
The 2021 BMW i3 Range Extender Rear follows the same rear-size pattern as the Base Rear, with either 175/60R19 or 175/55R20. The practical goal is to match the rear tire to the installed 19-inch or 20-inch wheel package and avoid crossing rear sizes between the two setups.
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Frequently Asked Questions
Common questions for the 2021 BMW i3 usually center on its unusual narrow tire sizing, 19-inch versus 20-inch wheel fitment, and the difference between front and rear applications. The FAQs below focus on choosing the right size, understanding staggered fitment, and checking the car before regular road use.
Tire Size & Fitment
What tire size fits a 2021 BMW i3?
The 2021 BMW i3 uses four primary radial tire sizes: 155/70R19, 155/60R20, 175/55R20, and 175/60R19. The exact size depends on the wheel package and, on staggered setups, whether the tire is for the front or rear axle.
The key is to match the tire to the actual wheel diameter and axle position on the car. A 19-inch setup uses different front and rear sizes than a 20-inch setup, so checking the existing tire sidewall and confirming front versus rear fitment is more important here than assuming all i3 models use the same tire.
What size rim does a 2021 BMW i3 use?
The 2021 BMW i3 uses either 19-inch or 20-inch rims, depending on the specific configuration. The 155/70R19 and 175/60R19 sizes are used with 19-inch wheels, while 155/60R20 and 175/55R20 are used with 20-inch wheels.
Confirming rim diameter should come before any tire purchase, because the i3 uses two distinct wheel diameters across its fitments. It is also important to check whether the wheel is on the front or rear axle, since the tire widths differ and the car's staggered layout means the same rim diameter does not automatically mean the same tire size.
Why does the 2021 BMW i3 have more than one tire size?
The 2021 BMW i3 has more than one tire size because it was offered with both 19-inch and 20-inch wheel packages, and its fitment can be staggered from front to rear. That creates separate front and rear sizes within each wheel-diameter setup rather than one universal size for every position.
This matters because a correct replacement starts with identifying the actual configuration on the car, not just the model name. Looking at the existing tire size and noting whether the tire is mounted on the front or rear axle helps prevent mixing 19-inch and 20-inch fitments or installing a front size where a rear tire belongs.
Choosing the Right Tire
What should I consider when choosing a 2021 BMW i3 tire?
Start with the exact tire size, axle position, and wheel diameter on the car. The 2021 BMW i3 uses narrow metric radial sizes that vary between 19-inch and 20-inch packages, so the first decision is whether the tire is for the front or rear and which wheel diameter is installed.
After that, compare the tire's intended application against the existing setup and avoid treating the i3 like a conventional square-fitment hatchback. A careful match matters because the front and rear sizes are part of the car's overall layout, and even small-looking differences in code can point to a completely different wheel package or axle position.
How do I choose between the available 2021 BMW i3 tire sizes?
The available sizes are not alternatives in the usual sense; they belong to different i3 configurations. 155/70R19 and 175/60R19 are tied to 19-inch fitments, while 155/60R20 and 175/55R20 are tied to 20-inch fitments, with separate front and rear sizing on staggered applications.
That means the right choice comes from matching the tire to the wheel already on the car rather than deciding between profiles by preference alone. Checking the current sidewall marking, confirming the wheel diameter, and noting whether the tire is mounted front or rear will narrow the selection much faster than comparing sizes across unrelated i3 setups.
What rim-width specifications should I compare when choosing 2021 BMW i3 tires?
Rim-width compatibility matters whenever a tire is being replaced on a specialized fitment like the 2021 BMW i3, even though the first match is still the tire size and rim diameter. The car's narrow front and wider rear sizes mean the wheel and tire should remain paired to the intended position.
A practical comparison starts with the existing wheel dimensions, especially if the car has aftermarket wheels or a previous owner changed the setup. Verifying wheel width along with front or rear position helps avoid sidewall shape issues, clearance concerns, or an incorrect match between the tire's designed application and the wheel it is being mounted on.
Restoration & Appearance
Does correct tire fitment matter for a 2021 BMW i3 restoration?
Yes. Even on a newer collector-minded vehicle like the 2021 BMW i3, correct tire fitment plays a major role in preserving the car's intended stance, proportions, and overall presentation. Its narrow metric tire sizes are visually distinctive, so replacing them with a more common but incorrect size can change the car's character quickly.
A restoration-oriented approach starts by confirming whether the car wears its 19-inch or 20-inch wheel package and then matching front and rear sizes accordingly. For owners pursuing exact historical authenticity, it also helps to compare the car against original literature, window-sticker information, or marque-specific records before making any appearance-driven tire change.
How does tire construction affect the appearance of a restored 2021 BMW i3?
On the 2021 BMW i3, construction is straightforward because the primary fitments are radial tires. The appearance question is less about choosing between bias-ply and radial, and more about keeping the proper narrow metric sizing and front-to-rear relationship that give the car its distinctive wheel-and-tire look.
An i3 can lose some of its intended visual balance if the tire proportions are changed, even when the substitute seems close at a glance. Maintaining the correct 19-inch or 20-inch setup and preserving the narrower front and wider rear sizing where applicable keeps the finished vehicle much closer to its original design language.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2021 BMW i3?
Yes. A 2021 BMW i3 with aftermarket wheels, suspension changes, or altered ride height can require closer fitment checks than a stock vehicle. Because the i3 already uses narrow, specialized sizes in both 19-inch and 20-inch formats, changes to the wheel or suspension setup can affect clearance and tire selection quickly.
A modified car should be checked for actual wheel diameter, width, and front-to-rear configuration before replacing tires. Steering clearance, inner clearance, and fender space all matter, especially on staggered setups, so the safest approach is to match the replacement tire to the real hardware on the vehicle rather than relying on model-level assumptions.
What should I inspect before driving a 2021 BMW i3 on new tires?
Before regular road use, inspect the wheel and tire setup to make sure each tire is mounted in the correct front or rear position and matches the wheel diameter on the car. It is also wise to confirm air pressure, look for any visible shipping or mounting damage, and check that valve stems and wheel hardware are in proper condition.
A short initial drive followed by a recheck can help catch issues early. Pay attention to rubbing, unusual steering feel, vibration, or uneven clearance at full lock, especially if the i3 has non-stock wheels or recently serviced suspension parts. Those quick checks help verify that the replacement tires suit the vehicle's actual setup.
How should tires on a 2021 BMW i3 be maintained?
Tires on a 2021 BMW i3 should be maintained with regular pressure checks, periodic visual inspection, and close attention to wear across both axles. Because the car may use different front and rear sizes, maintenance starts with keeping each tire in its intended position and watching for abnormal wear patterns.
Collector-style low-mileage use does not eliminate the need for inspection. Sidewall cracking, cuts, bulges, air loss, and age-related deterioration can still develop even when tread depth looks acceptable, so a lightly driven i3 should have its tires checked routinely and stored away from prolonged heat, sunlight, and moisture whenever possible.
