The 2021 Toyota Mirai represents a very different kind of modern flagship sedan, pairing Toyota’s advanced hydrogen fuel-cell technology with a longer, lower, more rear-drive-inspired luxury-sedan shape than earlier Mirai models. That shift gives tire fitment more importance, because wheel diameter and trim level directly affect both stance and replacement choices. This model uses radial tires in two sizes, 235/55R19 and 245/45R20, with the 20-inch fitment tied to Limited models while XLE models use 19-inch tires. Buyers sorting through replacements will want to balance exact trim fitment, sidewall style, and intended road use while confirming the actual wheel package on the car.
Which Tire Size Is Right for The 2021 Toyota Mirai
The 2021 Toyota Mirai uses two primary tire sizes, and the correct choice depends first on the exact sub-model and wheel diameter. Both fitments are radial, but they are not interchangeable simply because they belong to the same model year. XLE models use a 19-inch setup, while Limited models can use either a 19-inch or 20-inch tire, so confirming the wheel currently on the car is the first step before comparing replacement options.
235/55R19 is a metric radial size in which 235 identifies the nominal section width in millimeters, 55 is the aspect ratio, R denotes radial construction, and 19 is the rim diameter in inches. On the 2021 Toyota Mirai, this size serves as a primary fitment and is the one shared by all XLE models as well as some Limited applications. It is the straightforward choice when the car retains its 19-inch wheel package. Buyers should confirm the actual wheel diameter on the vehicle before replacing tires, especially if wheels have been changed since new.
245/45R20 is a metric radial size with a 245-millimeter nominal section width, a 45-series profile, radial construction, and a 20-inch rim diameter. On the 2021 Toyota Mirai, this size applies to Limited models equipped with the larger wheel package, so it should not be assumed to fit every Mirai. Available choices in this size include BFGoodrich, Nitto, and Pro-Trac options, with Blackwall, Redline, and raised white letter sidewall treatments. This size is the one to evaluate when appearance, brand preference, and wheel-specific fitment all matter together.
Sub-model fitment matters on the 2021 Toyota Mirai because tire size changes with trim and wheel package. The XLE stays with one primary size, while the Limited can appear with either a 19-inch or 20-inch fitment, making wheel confirmation especially important before replacement.
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2021 Toyota Mirai Limited
The 2021 Toyota Mirai Limited can use either the 235/55R19 radial size or the 245/45R20 radial size, depending on the wheel setup on the car. That makes wheel-diameter confirmation the key first step, followed by choosing among available brand and sidewall options in the correct size.
The 2021 Toyota Mirai XLE uses the 235/55R19 radial size, giving this sub-model a more straightforward replacement path. The main decision becomes confirming that the car still has its 19-inch wheels and then selecting a tire that matches the desired driving and appearance priorities.
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.
Best 2021 Toyota Mirai Tires for Sale
Available 245/45R20 replacements for the 2021 Toyota Mirai span BFGoodrich, Nitto, and Pro-Trac offerings in several tire series. Buyers comparing this size can sort options by Blackwall, Redline, or raised white letter sidewalls, along with rim-width compatibility and load-related specifications where stated.
Common 2021 Toyota Mirai tire questions usually center on the correct size by trim, 19-inch versus 20-inch wheel fitment, and how to compare available radial tire choices. Owners also tend to ask about appearance options, modifications, and basic inspection before regular road use.
Tire Size & Fitment
What tire size fits a 2021 Toyota Mirai?
The 2021 Toyota Mirai uses two primary tire sizes: 235/55R19 and 245/45R20. The 235/55R19 size applies to all XLE models and also appears on Limited applications, while 245/45R20 is used on Limited models with the larger wheel package.
The practical decision is not choosing between sizes by preference, but matching the tire to the actual trim and wheel diameter on the car. A Mirai with 19-inch wheels needs the 19-inch tire size, and a Mirai with 20-inch wheels needs the 20-inch size, so checking the wheels already installed is essential before purchase.
What size rim does a 2021 Toyota Mirai use?
The 2021 Toyota Mirai uses either a 19-inch or 20-inch rim, depending on the trim and wheel setup. The 235/55R19 tire fits a 19-inch rim, while the 245/45R20 tire fits a 20-inch rim.
Rim diameter should be confirmed before anything else because the two Mirai tire sizes do not share the same wheel size. Looking at the tire sidewall, measuring the wheel, or checking the current wheel package on the car will prevent ordering a tire that matches the model year but not the actual rim.
Do all 2021 Toyota Mirai sub-models use the same tire size?
No, the 2021 Toyota Mirai does not use one universal tire size across every sub-model. XLE models use 235/55R19, while Limited models can use either 235/55R19 or 245/45R20 depending on the wheel package.
That means trim name alone may not be enough if the car is a Limited. Verifying the wheel diameter on the vehicle is the safest next step, especially on a used Mirai where wheels may have been changed or where two factory-style fitment paths existed within the same model year.
Choosing the Right Tire
What should I consider when choosing a tire for a 2021 Toyota Mirai?
Start with the exact tire size and wheel diameter already on the car, since the 2021 Toyota Mirai uses both 19-inch and 20-inch fitments. Construction is straightforward because the Mirai uses radial tires, so the main selection points become correct size, trim-specific fitment, and product characteristics within that size.
After confirming size, compare factors such as sidewall style, brand, tire series, and any stated rim-width or load figures. A Mirai used mainly for regular road driving may call for a different choice than one where the owner is focused more on appearance, so matching the tire to the car’s actual use matters.
What sidewall styles are available for 2021 Toyota Mirai tires?
In 245/45R20, the 2021 Toyota Mirai has sidewall choices that include Blackwall, Redline, and RWL, or raised white letter. Those options appear across available radial products for the 20-inch Limited fitment and create a noticeably different visual presentation without changing the basic tire size.
Sidewall style is mostly an appearance decision, but it should be made only after the correct tire size has been confirmed. A buyer looking for a more understated modern look may lean toward Blackwall, while Redline or raised white letters can give the car a more customized visual character.
What brands offer tires for the 2021 Toyota Mirai?
Available 245/45R20 tires for the 2021 Toyota Mirai come from BFGoodrich, Nitto, and Pro-Trac. Those choices span several tire series, including g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, Nitto NT555 G2, and Pro-Trac Street Pro III.
Brand alone should not be the only filter. It makes more sense to compare the correct size, the series character, sidewall treatment, and any stated rim-width or load-related details that matter for the specific wheel package. That approach gives a cleaner comparison than choosing only by name on the sidewall.
Restoration & Appearance
Which tire should I choose for a period-style 2021 Toyota Mirai?
A 2021 Toyota Mirai is a modern vehicle, so period-style usually means deciding how restrained or expressive the tire’s appearance should be rather than recreating a vintage presentation. The first step is still the correct Mirai size, then choosing among the available radial options within that fitment.
For a cleaner factory-inspired look, a Blackwall tire is the most understated visual path in the available 245/45R20 offerings. Buyers who want a more individualized appearance can also consider Redline or raised white letter styles, but the wheel diameter and exact trim fitment need to stay correct before appearance choices come into play.
Which sidewall style suits a period-style 2021 Toyota Mirai?
For a 2021 Toyota Mirai, a period-style look generally points toward a simple modern sidewall treatment rather than a vintage-style one. Blackwall is the most understated option among the available 245/45R20 choices, while Redline and raised white letter versions create a more assertive visual statement.
The best match depends on how the car is presented. A Mirai kept close to its original visual theme usually pairs more naturally with Blackwall, while a customized car may suit the bolder sidewall styles. Size accuracy should remain the priority, since appearance cannot make up for the wrong wheel or tire fitment.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2021 Toyota Mirai?
Yes, modifications can affect tire fitment on a 2021 Toyota Mirai even when the tire size matches a known Mirai application. Aftermarket wheels, changes in wheel width, suspension alterations, or body-height changes can all influence clearance, steering behavior, and how well the tire matches the rim.
A Mirai that has been altered should be checked for actual wheel diameter, wheel width, and clearance around the fenders and suspension before replacement tires are selected. That is especially important when moving between the model’s 19-inch and 20-inch fitment paths, because the same model year does not mean the same setup.
What should I inspect before driving a 2021 Toyota Mirai on new tires?
Before driving a 2021 Toyota Mirai on new tires, inspect the wheels for damage, confirm that all four tires match the intended size and rim diameter, and verify that inflation pressures are set correctly for the installation. It is also smart to look over valve stems and check for any obvious mounting or balancing issues.
A short, careful road test helps confirm that the car tracks properly and that there is no rubbing, vibration, or air loss. After the first miles, recheck pressure and visually inspect the sidewalls and tread. That routine is especially useful on a Mirai with the larger 20-inch Limited wheel package.
What should I check before a longer drive in a 2021 Toyota Mirai?
Before a longer drive, check tire pressure, tread condition, sidewall condition, and any signs of cuts, bulges, or slow air loss. On a 2021 Toyota Mirai, it is also important to confirm that the tire size matches the wheel setup on the car, particularly if the vehicle is a Limited.
Longer trips are a good time to catch issues that may not show up around town. A quick look at wheel condition, visible clearance, and even tread wear can reveal alignment or suspension concerns early. Tires that are the correct size but worn unevenly still deserve attention before regular highway use.
