In 2018, Dodge still leaned hard into big-power American performance, with the Challenger carrying the brand’s retro coupe identity and the Charger doing the same in four-door form. Both models mixed everyday trim levels with far more aggressive wheel-and-tire packages, so tire selection across the 2018 Dodge range is broader than a quick glance might suggest. Eight sizes appear across two models, with several shared between Challenger and Charger while others are model-specific, especially at the wider high-performance end. The first step is confirming whether you have a Challenger or Charger, then matching the correct rim diameter and section width before narrowing down the right radial tire.
Which Tire Size Is Right for Your 2018 Dodge
Eight tire sizes appear across 2018 Dodge models, and they do not all fit both vehicles. Challenger and Charger share several common sizes, but some 18-inch and wider performance sizes are tied to only one model, so the real decision starts with confirming the correct model and rim diameter first. Understanding that distinction before choosing a product saves time and helps you match the right tire to the car.
Year(s): 2018|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- and Y-rated versions appearing across the size; W carries a 168 mph ceiling and Y carries a 186 mph-plus ceiling. This is one of the shared 2018 Dodge sizes, making it a common fitment point for either model when equipped with the correct 20-inch wheels.
235/55R19 is a metric radial size that reads as 235 millimeters wide, with a 55-series profile on a 19-inch wheel. Product details in this size are not represented here, so the key takeaway is that it remains a shared radial fitment for both Challenger and Charger on 19-inch wheels. Buyers should treat it as a model-overlap size and confirm the exact wheel package before moving on to product selection.
Year(s): 2018|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, and speed ratings vary by product: W-rated versions carry a 168 mph ceiling while Y-rated versions carry a 186 mph-plus ceiling. As a shared 2018 Dodge size, it suits buyers who need a wider 20-inch fitment used on both Challenger and Charger.
Year(s): 2018|Fit(s): Challenger|Construction: Radial|Rim: 18 in
315/40R18 is a metric radial size with a 315-millimeter section width, a 40-series profile, and an 18-inch rim diameter. This size is specific to the 2018 Dodge Challenger, and it is available from Nitto and Pro-Trac with blackwall, redline, and RWL sidewall choices; the Nitto version carries a ZR designation associated with 149 mph and above. It is the most specialized fitment on this page and is aimed at Challenger applications that use a very wide 18-inch rear tire.
Year(s): 2018|Fit(s): Challenger|Construction: Radial|Rim: 20 in
305/35R20 is a metric radial size with a 305-millimeter section width, a 35-series profile, and a 20-inch rim diameter. This size is specific to the 2018 Dodge Challenger, with blackwall and RWL versions available from M&H Racemaster, BFGoodrich, Nitto, and Pro-Trac; speed ratings vary by product, including W at 168 mph and Y at 186 mph-plus, while some products do not show a speed letter in the size marking. Challenger owners usually choose this size when their car carries one of the wider 20-inch rear-wheel packages.
235/55R18 is a metric radial size that combines a 235-millimeter section width with a 55-series profile on an 18-inch wheel. Product details in this size are not represented here, but it is a shared radial fitment used by both Challenger and Charger. That makes it a practical starting point for 18-inch-equipped cars before drilling down to the exact model page and wheel package.
225/60R18 is a metric radial size with a 225-millimeter section width, a 60-series aspect ratio, and an 18-inch rim diameter. This size is specific to the 2018 Dodge Charger, and product details are not represented here beyond its radial construction and 18-inch fitment. Charger owners should treat it as a model-specific size rather than assuming interchangeability with the wider shared 18-inch options.
Year(s): 2018|Fit(s): Charger|Construction: Radial|Rim: 18 in
245/55R18 is a metric radial size with a 245-millimeter section width, a 55-series profile, and an 18-inch rim diameter. This size is specific to the 2018 Dodge Charger and is available from BFGoodrich in a redline sidewall style. It stands apart from the blackwall performance-oriented 20-inch choices and will appeal most to Charger owners who want an 18-inch radial with a distinctive sidewall look.
Two Dodge models are covered for 2018: Challenger and Charger. They share several tire sizes, but fitment is not uniform across the range, and the widest options belong to specific model applications rather than the whole make. Select your model below to narrow the correct tire size, wheel diameter, and product choices for your car.
2018 Dodge Challenger
The 2018 Dodge Challenger carried Dodge’s retro-inspired two-door muscle-car formula, with everything from everyday V6 trims to some of the most aggressive factory performance variants of the era. Its tire range spans 18-, 19-, and 20-inch fitments, including the widest sizes on this page, so Challenger owners should verify the exact wheel package before choosing a tire.
The 2018 Dodge Charger brought Dodge muscle-car character into a full-size four-door sedan, blending daily usability with serious performance trims. Its tires mount on 18-, 19-, and 20-inch wheels, and the size spread runs from narrower 18-inch applications to wider shared 20-inch performance fitments depending on the car’s package.
Nineteen products are available across five of the eight tire sizes used on 2018 Dodge vehicles. 245/45R20 has 4 radial blackwall choices from BFGoodrich and Nitto; 275/40R20 has 4 radial blackwall choices from M&H Racemaster, BFGoodrich, and Nitto; 315/40R18 has 3 radial choices from Nitto and Pro-Trac in blackwall, redline, and RWL; 305/35R20 has 4 radial choices from M&H Racemaster, BFGoodrich, Nitto, and Pro-Trac in blackwall and RWL; 245/55R18 has 1 radial redline choice from BFGoodrich. Confirm size first, then check the specific tire’s speed rating before selecting.
These FAQs sort out how 2018 Dodge Challenger and Charger tire sizes overlap, where they differ by model, which sidewall styles and brands appear in the covered sizes, and what to check before regular use or long-term storage.
Size Basics & Fitment
What tire sizes fit 2018 Dodge vehicles?
2018 Dodge vehicles use eight tire sizes across the Challenger and Charger range: 245/45R20, 235/55R19, 275/40R20, 315/40R18, 305/35R20, 235/55R18, 225/60R18, and 245/55R18. Challenger and Charger share 245/45R20, 235/55R19, 275/40R20, and 235/55R18. The Challenger alone uses 315/40R18 and 305/35R20, while the Charger alone uses 225/60R18 and 245/55R18.
Rim diameter varies by size, with 18-, 19-, and 20-inch applications all appearing in the 2018 Dodge range, so year and make alone are not enough to choose correctly. If your car still has its original wheel package, match the tire size to the wheel diameter first. If the car has aftermarket wheels or staggered fitments, confirm the actual front and rear wheel sizes before moving to product choice.
What does 245/45R20 mean on a 2018 Dodge tire?
On a 2018 Dodge tire, 245/45R20 is a modern metric radial size. The 245 is the nominal section width in millimeters, 45 is the aspect ratio, R means radial construction, and 20 is the wheel diameter in inches. That size appears on both the 2018 Dodge Challenger and 2018 Dodge Charger.
Reading the code correctly matters because 245/45R20 is not interchangeable with every other 20-inch Dodge size. A 275/40R20 or 305/35R20 may share the same wheel diameter, but section width and profile differ enough to change fitment and stance. When comparing products, keep the full size code intact rather than focusing only on the 20-inch wheel diameter.
Do all 2018 Dodge models use the same tire size?
No, 2018 Dodge models do not all use the same tire size. Challenger and Charger overlap in several sizes, including 245/45R20, 235/55R19, 275/40R20, and 235/55R18, but each model also carries its own model-specific fitments. The Challenger adds 315/40R18 and 305/35R20, while the Charger adds 225/60R18 and 245/55R18.
That means a buyer should identify the exact model before narrowing down a tire, even when both cars come from the same year and make. It also helps explain why some 18-inch sizes are dramatically wider than others. If you are working from a title, VIN, or memory alone, confirm the wheel package on the car itself before assuming another 2018 Dodge size will cross over.
Buying the Right Tire
What sidewall styles are available for 2018 Dodge tires?
2018 Dodge tire choices in the covered sizes include blackwall, redline, and RWL sidewall styles. Blackwall dominates the 245/45R20 and 275/40R20 sizes, while 315/40R18 appears in blackwall, redline, and RWL, and 305/35R20 appears in blackwall and RWL. The 245/55R18 size appears as a redline radial.
Sidewall style affects appearance far more than fitment, but it can strongly change how the car presents. A blackwall usually suits a modern performance look, while redline and raised white letters give a more visual, heritage-oriented character. For a 2018 Dodge, the right choice often comes down to whether you want a contemporary factory-style appearance or a more custom, nostalgic presentation.
What brands make tires for 2018 Dodge vehicles?
The covered 2018 Dodge sizes are available from BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac. BFGoodrich appears in 245/45R20, 275/40R20, and 245/55R18. Nitto appears in 245/45R20, 275/40R20, 315/40R18, and 305/35R20, while M&H Racemaster appears in 275/40R20 and 305/35R20, and Pro-Trac appears in 315/40R18 and 305/35R20.
Brand choice usually follows the kind of look or use you want after the correct size is settled. Some options stay squarely in blackwall street-performance territory, while others bring in drag-oriented or specialty sidewall treatments. Once you know the exact tire size on your 2018 Dodge, compare the available brands within that size rather than assuming every brand covers every fitment.
What is the difference between Nitto NT555 G2 and Pro-Trac Street Pro III for the 2018 Dodge 315/40R18 size?
In 315/40R18 for a 2018 Dodge Challenger application, the Nitto NT555 G2 comes as a blackwall radial with a 1,874-pound maximum load at 44 psi and a rim-width range of 10.5 to 12.5 inches, centered on 11.0 inches. The Pro-Trac Street Pro III appears in both redline and RWL versions at essentially the same overall weight class, but without the same published load-and-pressure figure in this group.
That makes the comparison more about presentation and wheel compatibility details than about simple size alone. If you want a straightforward blackwall performance look and a published rim-width range, the Nitto gives you more setup guidance. If sidewall appearance matters more to the build, the Pro-Trac choices add visual character while staying within the same broad 315/40R18 fitment family.
Fitting & Setup
What rim width do 2018 Dodge tires require?
Published rim-width guidance varies by size on 2018 Dodge applications. For 245/45R20, the range is 7.5 to 9.0 inches. For 275/40R20, published fitments include 9.0 inches, 9.00 to 9.50 inches, and 9.0 to 11.0 inches depending on the tire. For 315/40R18, one covered option fits 10.5 to 12.5 inches, centered on 11.0, while 305/35R20 options include 10.0 to 12.0 inches and an 11-inch application.
Those ranges show why wheel width matters just as much as wheel diameter on wider performance sizes. Two tires may share the same 20-inch rim diameter and still want very different wheel widths. Before selecting a tire for a 2018 Dodge, measure the actual wheel or confirm the wheel specification so the tire’s approved rim-width range matches the hardware already on the car.
Do 2018 Dodge tires require inner tubes?
The covered 2018 Dodge sizes are radial tires intended for modern wheel applications, and at least some products in these sizes are clearly marked TL, meaning tubeless. Tube-type markings do not appear in the covered products here. That puts the 2018 Dodge fitments on this page in the tubeless category where the tire itself carries a tubeless marking.
Even so, the wheel condition still matters. A tubeless tire needs a sound bead seat and a healthy valve stem to hold pressure correctly, especially on a heavier performance-oriented car. If your 2018 Dodge has aftermarket wheels, repaired wheels, or wheels that have seen corrosion, inspect the wheel condition during installation rather than assuming every 18-, 19-, or 20-inch wheel is equally ready for tubeless service.
Can the original 2018 Dodge wheels be used with all tire sizes?
No, the original 2018 Dodge wheels cannot be treated as universal across all sizes on this page. The range includes 18-, 19-, and 20-inch tires, so wheel diameter alone prevents a direct swap in many cases. Even within the same diameter, published rim-width needs differ substantially, especially once you move into 275-, 305-, and 315-section tires.
A 20-inch wheel that works with a 245/45R20 may not be the right width for a 305/35R20, and an 18-inch Charger wheel is not automatically suitable for a 315/40R18 Challenger application. The safe approach is to confirm the wheel diameter and width already on your 2018 Dodge before comparing alternate sizes. That keeps the fitment conversation tied to the actual wheel, not just the tire code.
Maintenance, Storage & Longevity
How should I store a 2018 Dodge when the tires are fitted?
A 2018 Dodge should be stored on clean, properly inflated tires in a cool, dry area away from direct sunlight, electric motors, battery chargers, welders, and other ozone-producing sources. Even modern radials age faster when they sit in heat or UV exposure for long periods. If the car will be parked for an extended season, rolling it periodically helps reduce localized flat-spotting and stress on the casing.
Storage habits matter because many Challengers and Chargers are driven less than ordinary daily cars. A vehicle that looks excellent cosmetically can still be aging its tires while parked. If the car is stored for long stretches, check inflation before and after storage, keep the contact patch off wet concrete when possible, and inspect the sidewalls closely before the first drive of the season.
How long do tires on a 2018 Dodge typically last?
Tire life on a 2018 Dodge is usually judged more by age and condition than by mileage alone, especially on collector-owned or low-use cars. A good rule is to begin evaluating tires carefully once they reach about five to seven years of age, and to treat around ten years as a serious replacement threshold regardless of remaining tread. The DOT date code on the sidewall is the reference point for that timeline.
High-horsepower use, aggressive alignment, and long periods of inactivity can all shorten useful life even when tread depth still looks acceptable. A wide rear Challenger tire may age differently from a narrower Charger front tire simply because of heat cycles and loading. If your 2018 Dodge is driven infrequently, let time and condition guide the decision instead of waiting for the tread to wear out.
How often should tires on a 2018 Dodge be inspected?
Tires on a 2018 Dodge should be inspected before every drive and given a more thorough check before any extended outing. Look for cracking, cuts, bulges, punctures, uneven wear, and any sign that the tire is losing pressure between drives. On performance-oriented sizes, also watch for shoulder wear and signs that the wheel may have contacted a curb or pothole.
Frequent inspections matter because cars like the Challenger and Charger can put real load into their tires even during ordinary highway use. A quick visual walkaround catches problems early, while a seasonal close inspection helps you decide whether a tire is still serviceable. If a tire has been sitting for weeks or months, check cold pressure and sidewall condition before the car goes back on the road.
Safety & Road Use
Are 2018 Dodge tires safe for highway driving?
Yes, the covered 2018 Dodge tires are modern radial designs intended for road use, and several carry high speed ratings. In the sizes where ratings appear, W-rated tires are rated to 168 mph, Y-rated tires are rated to 186 mph and above, and ZR-marked sizes indicate a high-speed category beginning above 149 mph. Those ratings are far beyond normal highway speeds, provided the tire is in good condition and correctly matched to the wheel.
Real-world safety depends on far more than the speed symbol alone. Tire age, air pressure, alignment, suspension condition, and the condition of the car itself all play a major role, especially on a heavy, powerful platform like a 2018 Dodge Challenger or Charger. For highway use, the smart move is to verify condition and setup first rather than focusing only on the performance label on the sidewall.
What inflation pressure should I use for 2018 Dodge tires?
Inflation pressure for 2018 Dodge tires should follow the vehicle placard or owner’s manual first, with the tire’s own sidewall figures used as the tire’s maximum-rated load-and-pressure reference rather than the default running pressure. Among the covered products, examples include 245/45R20 at 1,930 pounds at 50 psi, 275/40R20 at 2,094 pounds at 50 psi, and 315/40R18 at 1,874 pounds at 44 psi.
Those figures should not be transferred from one size to another, and they should not be treated as blanket recommendations for street pressure. A Charger on 245/55R18 and a Challenger on 305/35R20 have very different tire dimensions and intended wheel packages. Use the factory vehicle recommendation as your starting point, then fine-tune only within the tire maker’s approved limits if your application requires it.
What should I check before taking a 2018 Dodge on a longer drive?
Before a longer drive in a 2018 Dodge, inspect all four tires for cracks, cuts, punctures, bulges, irregular wear, and proper cold inflation. Check the spare if the car carries one, and make sure the valve stems are in good condition. On wide performance sizes, also confirm there is no rubbing, wheel damage, or evidence that a recent alignment change is wearing one shoulder faster than the other.
Tire condition is only one part of a broader pre-drive check on a performance car, but it is one of the easiest places to catch trouble before it becomes a roadside problem. If the car has been sitting, take a few extra minutes to confirm pressure retention and inspect the inside sidewall area as well as the outside face. A quick look before departure is much easier than solving a tire issue on the road.
