2021 Dodge carried two of the brand’s most recognizable modern performance nameplates, pairing the retro-inspired Challenger coupe with the Charger sedan’s muscle-car attitude and everyday practicality. Both models span everything from more mainstream street combinations to wide, aggressive high-performance fitments, so tire choice is not one-size-fits-all even within the same model year. Across 2021 Dodge, nine tire sizes appear over two models, with several shared between Challenger and Charger and others tied to one model only. The first thing to confirm before choosing a tire is whether you have a Challenger or Charger, then match the exact size and wheel diameter used on your car.
Which Tire Size Is Right for Your 2021 Dodge
2021 Dodge vehicles use nine tire sizes, and those sizes vary by model rather than carrying across the full Challenger and Charger range. Since every size here is a radial but rim diameters span 17, 18, 19, and 20 inches, the real decision starts with confirming the correct wheel diameter and then narrowing to the exact size used on your model. Understanding that distinction before choosing a product saves time and helps ensure the right match.
Year(s): 2021|Fit(s): Challenger, Charger|Construction: Radial|Rim: 20 in
245/45R20 is a metric radial size with a 245-millimeter section width, a 45-series aspect ratio, and a 20-inch rim diameter. It is available from BFGoodrich and Nitto in Blackwall form, with W-, Y-, and Z-rated versions depending on product, including W up to 168 mph and Y up to 186 mph. Because this size is shared by both Challenger and Charger, it is one of the more straightforward cross-model fitments in the 2021 Dodge range. It suits buyers who want a modern radial in a widely supported performance size.
Year(s): 2021|Fit(s): Challenger, Charger|Construction: Radial|Rim: 20 in
275/40R20 is a metric radial size with a 275-millimeter section width, a 40-series aspect ratio, and a 20-inch rim diameter. It is available from M&H Racemaster, BFGoodrich, and Nitto in Blackwall form, with speed ratings varying by product: BFGoodrich and Nitto offer W versions up to 168 mph, while BFGoodrich also offers a Y version up to 186 mph. This size is used by both Challenger and Charger, but wheel-width requirements vary by product and should be checked before final selection. It is a strong fit for buyers who need a broader 20-inch radial footprint and want to compare street-oriented and drag-biased product types.
Year(s): 2021|Fit(s): Challenger, Charger|Construction: Radial|Rim: 20 in
305/35R20 is a metric radial size with a 305-millimeter section width, a 35-series aspect ratio, and a 20-inch rim diameter. It is available from M&H Racemaster, BFGoodrich, Nitto, and Pro-Trac, with Blackwall and RWL sidewall styles and with speed ratings varying by product, including W up to 168 mph and Y up to 186 mph; tubeless marking also varies by product. Shared by both Challenger and Charger, it sits at the wide end of the 20-inch fitment range and is not universal across every 2021 Dodge model. It appeals to buyers chasing an aggressive stance, a wide rear-oriented look, or a more specialized high-performance tire character.
Year(s): 2021|Fit(s): Challenger|Construction: Radial|Rim: 18 in
315/40R18 is a metric radial size with a 315-millimeter section width, a 40-series aspect ratio, and an 18-inch rim diameter. It is available from Nitto and Pro-Trac in Blackwall, Redline, and RWL styles, with a Z-rated Nitto version and styling-focused alternatives from Pro-Trac. This size is specific to the Challenger rather than shared across the full 2021 Dodge lineup. It is the right path for a Challenger owner who needs this exact 18-inch wide fitment and wants to balance modern radial behavior with a custom sidewall appearance.
235/55R19 is a metric radial size with a 235-millimeter section width, a 55-series aspect ratio, and a 19-inch rim diameter. Product choices and sidewall variations are not shown here, but the size itself is a shared radial fitment for both Challenger and Charger. Because it is not one of the wide 20-inch performance sizes, the key is matching the exact 19-inch wheel application on your car. It suits owners whose 2021 Dodge uses the factory-style 19-inch fitment rather than one of the more aggressive staggered or wide-section combinations.
235/55R18 is a metric radial size with a 235-millimeter section width, a 55-series aspect ratio, and an 18-inch rim diameter. Product details and sidewall variations are not shown here, but this is an 18-inch radial size used only on the Challenger. That model-specific fitment makes it important to identify the car as a Challenger before narrowing the tire choice. It is best for owners who need the exact standard-width 18-inch Challenger application rather than one of the wider performance sizes.
225/60R18 is a metric radial size with a 225-millimeter section width, a 60-series aspect ratio, and an 18-inch rim diameter. Product details and sidewall variations are not shown here, but it remains a Charger-specific 18-inch radial fitment. Since this size is not shared with the Challenger, it should be treated as a model-specific choice rather than a general 2021 Dodge size. It is appropriate for Charger owners whose car uses the narrower, taller-profile 18-inch setup.
Year(s): 2021|Fit(s): Charger|Construction: Radial|Rim: 18 in
245/55R18 is a metric radial size with a 245-millimeter section width, a 55-series aspect ratio, and an 18-inch rim diameter. It is available from BFGoodrich in Redline form, giving this Charger-specific size a more distinctive sidewall look than the more common blackwall performance options. This size is unique to the Charger within the 2021 Dodge range, so it should not be confused with the Challenger’s 18-inch fitments. It is a natural choice for a Charger owner who wants the correct 18-inch size with a stronger visual emphasis from the sidewall.
215/65R17 is a metric radial size with a 215-millimeter section width, a 65-series aspect ratio, and a 17-inch rim diameter. Product details and sidewall variations are not shown here, but it is a Charger-only radial fitment and the smallest rim diameter used across 2021 Dodge. That makes wheel diameter confirmation especially important before choosing a replacement. It fits Charger applications that use a more conservative 17-inch package instead of the larger 18-, 19-, or 20-inch combinations.
Two 2021 Dodge models are covered here: Challenger and Charger. They do not all use the same tire sizes, and several fitments are tied to one model only, so year and make alone are not enough to choose correctly. Select your model below to narrow the tire history, exact size range, and available products to the right vehicle.
2021 Dodge Challenger
The 2021 Dodge Challenger carries the modern Mopar muscle-car formula in coupe form, with a long-hood, rear-drive layout and a broad range of factory wheel and tire combinations. Its fitments span 18-, 19-, and 20-inch wheels, from more standard-width applications to very wide performance-oriented sizes, so identifying the exact wheel package matters before replacing tires.
The 2021 Dodge Charger translates Dodge muscle into a four-door sedan, combining everyday usability with the same visual attitude and available performance character that define the brand. Its tire range stretches from 17-inch and 18-inch everyday applications to shared 20-inch performance sizes also seen on the Challenger, so wheel diameter is the first detail to confirm.
Nineteen products are available across five tire sizes for 2021 Dodge vehicles. 245/45R20 has 4 radial choices from BFGoodrich and Nitto in Blackwall form; 275/40R20 has 4 radial choices from M&H Racemaster, BFGoodrich, and Nitto in Blackwall; 305/35R20 has 4 radial choices from M&H Racemaster, BFGoodrich, Nitto, and Pro-Trac in Blackwall and RWL; 315/40R18 has 3 radial choices from Nitto and Pro-Trac in Blackwall, Redline, and RWL; 245/55R18 has 1 BFGoodrich radial in Redline form. Confirm the exact size first, and check the individual tire’s speed rating and tubeless marking where they vary within a size.
These FAQs focus on how Challenger and Charger tire sizes differ within 2021 Dodge, what the metric size codes mean, which sidewall and brand options exist in supported sizes, and what to check for safe collector-style or enthusiast use.
Size Basics & Fitment
What tire sizes fit 2021 Dodge vehicles?
2021 Dodge vehicles use nine sizes across the Challenger and Charger range: 245/45R20, 275/40R20, 305/35R20, 315/40R18, 235/55R19, 235/55R18, 225/60R18, 245/55R18, and 215/65R17. Challenger uses 245/45R20, 275/40R20, 305/35R20, 315/40R18, 235/55R19, and 235/55R18. Charger uses 245/45R20, 225/60R18, 245/55R18, 305/35R20, 235/55R19, 215/65R17, and 275/40R20. Product-backed rim diameters in this range are 18 and 20 inches, with rim-width guidance on supported products running from 7.5 to 12.5 inches depending on size.
That spread means 2021 Dodge fitment is highly model- and wheel-package-specific. Shared 20-inch sizes such as 245/45R20, 275/40R20, and 305/35R20 can appear on both models, but several 17-, 18-, and 19-inch sizes belong to only one model. Start by confirming whether the car is a Challenger or Charger, then verify the wheel diameter already on the vehicle before comparing brands or sidewall styles.
What does 245/45R20 mean on a 2021 Dodge tire?
On a 2021 Dodge tire, 245/45R20 is a metric radial size code. The 245 is the nominal section width in millimeters, 45 is the aspect ratio, the R means radial construction, and 20 is the wheel diameter in inches. On 2021 Dodge applications, this size is used on both Challenger and Charger and is supported by 20-inch radial products from BFGoodrich and Nitto. Supported rim-width guidance for products in this size runs from 7.5 to 9.0 inches.
Knowing how to read that code helps prevent a common mistake: matching only the wheel diameter while missing width or profile. A 245/45R20 is not interchangeable with a 275/40R20 or 305/35R20 simply because all three mount on 20-inch wheels. If your car currently wears 245/45R20, keep your attention on that exact size first, then compare speed rating, sidewall look, and intended use among the available tires.
Do all 2021 Dodge models use the same tire size?
No. 2021 Dodge models do share some sizes, but not all of them. Challenger and Charger both use 245/45R20, 275/40R20, 305/35R20, and 235/55R19, while 315/40R18 and 235/55R18 are Challenger-only sizes and 225/60R18, 245/55R18, and 215/65R17 are Charger-only sizes. Every size in this year-and-make group is a radial, but the wheel diameters still vary from 17 to 20 inches.
That matters because two 2021 Dodge vehicles parked side by side may look similar yet need completely different replacements. A Charger owner with 17-inch or 18-inch wheels should not assume Challenger fitments apply, and a Challenger owner with an 18-inch wide setup should not assume every 18-inch Charger tire is comparable. Confirm the exact model and the size molded into the sidewall before narrowing to a specific tire.
Buying the Right Tire
What sidewall styles are available for 2021 Dodge tires?
2021 Dodge tire choices in the supported product range include Blackwall, RWL, and Redline sidewall styles, but they are not available in every size. 245/45R20 and 275/40R20 are Blackwall-only in the products shown here. 305/35R20 adds RWL alongside Blackwall, 315/40R18 is available in Blackwall, Redline, and RWL, and 245/55R18 is offered in Redline. That makes sidewall appearance a meaningful part of the decision on certain 18- and 20-inch fitments.
For a modern 2021 Dodge, Blackwall is the most straightforward contemporary look, especially on performance-oriented wheel packages. Redline and raised white letters lean more into visual customization and a heritage-inspired muscle aesthetic rather than a factory-neutral appearance. If the car’s look matters as much as the size itself, choose the exact fitment first and then compare whether that size supports the sidewall treatment you want.
What brands make tires for 2021 Dodge vehicles?
2021 Dodge tire coverage in the available product range comes from BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac. BFGoodrich appears in 245/45R20, 275/40R20, 305/35R20, and 245/55R18. Nitto covers 245/45R20, 275/40R20, 305/35R20, and 315/40R18, while M&H Racemaster appears in 275/40R20 and 305/35R20, and Pro-Trac appears in 305/35R20 and 315/40R18. Brand choice therefore changes quite a bit depending on the exact size your Challenger or Charger uses.
That mix creates a useful split between more mainstream high-performance radial offerings and more specialized or style-driven choices. A shared size like 305/35R20 gives you the broadest brand spread, while a size like 245/55R18 is much narrower in brand coverage. Once you know the exact size on your 2021 Dodge, compare the available brands by speed rating, sidewall appearance, and wheel-width compatibility rather than by name alone.
What is the difference between Nitto NT555 G2 and Pro-Trac Street Pro III for 2021 Dodge vehicles?
On 2021 Dodge fitments where both appear, the Nitto NT555 G2 and Pro-Trac Street Pro III differ mainly in sidewall presentation and the product details that accompany them. In 315/40R18, Nitto offers a Blackwall NT555 G2 with a stated max load of 1,874 pounds at 44 psi and a recommended rim-width range centered around 11.0 inches, while Pro-Trac Street Pro III appears in Redline and RWL versions. In 305/35R20, Nitto is a Blackwall radial and Pro-Trac offers an RWL version, giving the buyer a stronger visual distinction.
That means the decision is less about one being universally right and more about matching the tire to the build. If your 2021 Dodge project calls for a clean modern sidewall, the Nitto presentation is more understated. If the car leans toward custom muscle styling, Pro-Trac’s redline or raised-white-letter look may be the better visual fit, assuming the wheel and size match your application.
Fitting & Setup
What rim width do 2021 Dodge tires require?
Supported rim-width guidance varies by size and by product on 2021 Dodge applications. For 245/45R20, the supported range is 7.5 to 9.0 inches. For 275/40R20, product guidance includes 9.0 inches, 9.00 to 9.50 inches, and 9.0 to 11.0 inches. For 305/35R20, supported widths include 10.0 to 12.0 inches and an 11-inch application, while 315/40R18 includes a 10.5 to 12.5-inch range centered around 11.0 inches.
Those numbers are why width should be checked at the product level, not assumed from the size alone. Two tires in the same nominal size can have different approved wheel-width windows. Before fitting a tire to any 2021 Dodge Challenger or Charger wheel, verify the actual wheel width and compare it to the specific tire you are considering rather than treating all products in that size as interchangeable.
Do 2021 Dodge tires require inner tubes?
Most supported 2021 Dodge tires in these sizes are modern radials with no tube-type marking, and one 305/35R20 BFGoodrich product is explicitly marked TL for tubeless use. At the same time, tube status can vary by product because not every tire carries the same sidewall marking in the available information. That is especially important in shared performance sizes such as 305/35R20, where products from different brands do not all present the same tube notation.
The safest approach is to confirm the exact sidewall marking on the tire you plan to use and make sure it matches the wheel you plan to mount it on. On a modern 2021 Dodge wheel, buyers will usually be working with tubeless-compatible radial products, but it is still wise to verify the actual tire marking rather than assuming every tire in the same nominal size is marked the same way.
Can the original 2021 Dodge wheels be used with all tire sizes?
No, because 2021 Dodge tire sizes in this group do not all share the same wheel diameter. The range includes 17-, 18-, 19-, and 20-inch sizes, and a tire must match the wheel diameter exactly. Even within a single diameter, the supported wheel-width range can change substantially from one size to another, especially in the wider 20-inch and 18-inch performance fitments.
A 20-inch Charger or Challenger wheel may accept several 20-inch tire sizes only if the wheel width also falls within the approved range for the specific tire. The same logic applies to the 18-inch sizes, where standard-width and extra-wide applications are not interchangeable by default. Confirm wheel diameter first, then wheel width, and only then compare alternate sizes within that same wheel family.
Maintenance, Storage & Longevity
How should I store a 2021 Dodge when the tires are fitted?
A 2021 Dodge stored on its tires should be kept in a cool, dry space away from direct sunlight, electric motors, battery chargers, welders, and other ozone-producing equipment that can accelerate rubber aging. Keep the tires properly inflated during storage and move the car periodically so the same section of the tread is not carrying the load for months at a time. Clean, dry floors and stable temperature conditions also help preserve the tire casing and sidewall finish.
If the car will sit for a long season, many owners either reposition it regularly or place it on stands according to safe shop practice to reduce long-term flat spotting and stress. That matters even with modern radials because collector and enthusiast cars often spend far more time parked than daily-driven vehicles. Good storage habits can do as much for tire life as cautious road use.
How long do tires on a 2021 Dodge typically last?
On a 2021 Dodge, tire age is usually a more important replacement factor than mileage once the car becomes an occasional-use enthusiast vehicle. A practical rule is to start evaluating tires closely around five to seven years of age and to treat about ten years as a serious replacement threshold regardless of tread depth. The DOT date code on the sidewall is the best starting point for establishing age, especially if the car has seen long periods of storage.
High-performance sizes can look usable long after the rubber has begun to harden, and a low-mileage car is especially vulnerable to that false sense of security. If the sidewalls show cracking, the tread has hardened, or the tires no longer balance and drive consistently, replacement should move up the timeline. Tire age, storage history, and condition matter more than the odometer alone.
How often should tires on a 2021 Dodge be inspected?
Tires on a 2021 Dodge should be inspected before every drive and again before any longer highway or road-trip use. Check air pressure, tread depth, irregular wear, cuts, bulges, and any cracking around the sidewall or shoulder. On wider performance sizes, also look for signs of rubbing or uneven wear that can point to alignment or wheel-width issues. A close visual check only takes a few minutes and is one of the easiest ways to catch a problem early.
A more thorough inspection several times a year is a good idea even if the car is rarely driven. Enthusiast cars often sit long enough for pressure loss, aging, or localized tire stress to develop without obvious warning. If the car has a spare, include it in the same routine so it is roadworthy when needed rather than becoming the forgotten weak link on a longer trip.
Restoration & Authenticity
What tires were originally fitted to the 2021 Dodge Challenger?
A 2021 Dodge Challenger was originally a modern radial-tire car, not a bias-ply-era vehicle, and the size depended on the exact trim and wheel package installed on that individual car. Within the fitments covered here, Challenger uses 245/45R20, 275/40R20, 305/35R20, 315/40R18, 235/55R19, and 235/55R18. That means originality on a 2021 Dodge is less about vintage construction and more about matching the factory wheel diameter, section width, profile, and overall visual presentation.
For a stock-style restoration or a preservation-minded replacement, the best starting point is the size currently specified on the vehicle placard and the tire sidewall on the car when known to be correct. Sidewall styling also matters if you are trying to preserve a factory look rather than create a custom one. If the car has unusual options or a changed wheel package, a Dodge specialist or marque forum can help verify what was originally installed.
Does correct tire fitment matter for showing a 2021 Dodge?
Yes, correct tire fitment still matters on a 2021 Dodge shown in stock or preservation-oriented classes. Judges and knowledgeable enthusiasts will notice if the car wears the wrong size, an incorrect wheel diameter, or a sidewall style that changes the intended factory appearance. On a newer performance car, authenticity tends to center on maintaining the right modern radial look and the proper relationship between tire width, sidewall profile, and wheel package.
That does not mean every show car must avoid custom tires, only that the standards change with the class and the goal of the build. A modified Challenger or Charger may wear redlines or raised white letters as a style choice, but that is a different statement from factory-correct presentation. If event scoring matters, check the class rules before changing sidewall treatment or moving away from the original size family.
What is the difference between BFGoodrich and Nitto in 245/45R20 for 2021 Dodge vehicles?
In 245/45R20 for 2021 Dodge, both BFGoodrich and Nitto offer Blackwall radial options, but the spec details are not identical. BFGoodrich appears in multiple versions of the size, including W- and Y-speed-rated products, with max load figures around 1,929 to 1,930 pounds at 50 psi on products where load data is shown and a supported rim-width range of 7.5 to 9.0 inches. Nitto also offers a Blackwall 245/45ZR20 option in a W-speed-rated version, giving this shared size more than one approach within the same basic fitment.
For a 2021 Dodge buyer, that means the comparison should focus on the exact product rather than the brand name alone. Even when two tires share the same 245/45R20 size, speed rating and other specification details can differ. If you are choosing between BFGoodrich and Nitto in this fitment, compare the intended use of the car, the wheel width on the vehicle, and the speed rating you want to retain.
Safety & Road Use
Are 2021 Dodge tires safe for highway driving?
Yes, the supported 2021 Dodge tires here are modern radial designs, and many carry performance-oriented speed ratings appropriate for highway use when they are in good condition and properly matched to the vehicle. The products shown include W-rated tires up to 168 mph and Y-rated tires up to 186 mph, with some Z-marked high-speed applications as well. Those figures exceed normal highway speeds by a wide margin, although a drag-oriented tire and a general street-performance tire should not be treated as the same kind of product simply because both are radial.
Real-world safety still depends on condition, inflation, load, alignment, and the mechanical state of the car. A 2021 Dodge Challenger or Charger with worn suspension parts, poor alignment, or aged rubber will not benefit much from a high speed rating on paper. Match the tire to the way the car is driven, inspect it carefully, and keep the entire vehicle sorted rather than judging suitability by the size code alone.
What inflation pressure should I use for 2021 Dodge tires?
Inflation pressure on a 2021 Dodge should follow the vehicle manufacturer’s recommendation for the exact model and wheel package first, then be checked against the tire manufacturer’s own maximum-pressure and load information where it appears. Among the supported products here, examples include 245/45R20 tires around 1,929 to 1,930 pounds at 50 psi, 275/40R20 around 2,094 pounds at 50 psi, and a 315/40R18 at 1,874 pounds at 44 psi. Those figures are tire capability references, not blanket operating pressures for every 2021 Dodge application.
The key point is not to transfer one pressure number from one size to another just because both happen to fit a Dodge muscle car. A 245/45R20, 275/40R20, and 315/40R18 each carry different casing dimensions and load behavior. Check the placard or owner’s manual for the car’s baseline recommendation, then fine-tune only within the tire maker’s limits and with the actual vehicle use in mind.
What should I check before taking a 2021 Dodge on a longer drive?
Before a longer drive in a 2021 Dodge, inspect all four tires for cracking, punctures, embedded debris, bulges, and uneven tread wear, then confirm cold inflation pressure and recheck the spare if the car carries one. Make sure the tire size on the car matches side to side on each axle and that no wheel shows damage or evidence of past curb impact. Wider fitments also deserve a quick check for clearance issues at full steering lock or under compression if the car has been modified.
Tires are only one part of the pre-drive checklist on a performance-oriented modern muscle car. Brake condition, fluid levels, battery health, and suspension condition matter just as much once the trip extends beyond a short local drive. If the tires pass inspection and the rest of the car is equally sound, a 2021 Dodge Challenger or Charger is far better positioned for a trouble-free outing.
