245/60R18 Tire Size Guide

The 245/60R18 code gives three main dimensions and one construction detail. In this size, 245 means the tire is 245 millimeters wide at its section width, 60 means the sidewall height is 60 percent of that width, R means radial construction, and 18 means the tire fits an 18-inch wheel.

Modern metric sizing like 245/60R18 tells you much more directly than many older tire formats. A buyer can quickly compare width, profile, and rim diameter without decoding a letter class or a vintage series number. What it does not tell you by itself is whether the tire will clear the vehicle, match the wheel width, or meet the load needs of a specific application, so those points still need to be checked before installation.

The 245/60R18 fits an 18.0-inch wheel, which is 457.2 millimeters in diameter. That bead-seat diameter must match exactly, because a tire built for an 18-inch rim cannot be mounted safely on a wheel of any other diameter.

Wheel diameter is only one part of the fitment picture. Buyers should also confirm that the wheel width falls within the range approved for the specific tire they are considering, because profile shape and sidewall behavior depend on that relationship. If you are replacing factory tires, compare the wheel markings and current sidewall information before assuming every 18-inch wheel is appropriate for the same 245/60R18 fitment.

The 245/60R18 has a section width of 245 millimeters, which converts to 9.65 inches. Section width is measured at the widest point of the inflated casing, so it represents the overall sidewall-to-sidewall width rather than the tread face alone.

Clearance questions usually come back to section width more than tread width. Fender lips, strut bodies, control arms, and steering components all care about the widest part of the tire, not just the contact patch on the road. If you are comparing this size to a narrower or wider substitute, use the section width first, then review wheel offset and suspension clearance so the new tire does not create rubbing problems.

The 245/60R18 has an overall diameter of 29.57 inches, or about 751.1 millimeters. That figure combines both sidewalls with the 18-inch rim diameter to show the tire’s full mounted height from top to bottom.

Overall diameter affects more than appearance. A taller or shorter replacement can change wheel-opening fill, effective gearing, and speedometer behavior, even when the wheel diameter stays the same. Buyers comparing alternate sizes should use this number as one of the first checkpoints, because a small change in width may be manageable while a larger change in diameter can alter stance and introduce clearance issues at compression or full steering lock.

The 245/60R18 has a sidewall height of 5.79 inches, which is 147.0 millimeters. That is the distance from the wheel’s bead seat to the outer edge of the tread on one side of the tire.

Sidewall height helps explain how the tire will look and feel compared with a lower-profile or taller-profile option. A 60-series sidewall still leaves enough height for a fuller profile than many aggressive modern fitments, while avoiding the especially tall look of higher-series tires. When buyers want to preserve original proportions, maintain ride comfort, or avoid an overly short sidewall on an 18-inch wheel, this measurement becomes an important comparison point.

The 245/60R18 turns about 682.0 revolutions per mile. That number comes from the tire’s overall circumference and shows how many full rotations it completes over one mile of travel.

Revolutions per mile matter when you are comparing replacement sizes that are close on paper but not identical in rolling height. A tire with a meaningfully different figure can alter speedometer and odometer readings, and it may also change how the vehicle feels in gearing-sensitive situations. If you are considering an alternate size, compare revolutions per mile alongside overall diameter so the replacement stays close to the proportions your vehicle expects.

No. Sharing an 18-inch wheel diameter does not make every 18-inch tire interchangeable. The 245/60R18 also brings a specific section width, sidewall height, and overall diameter, and those dimensions affect clearance at the fenders, suspension, brakes, and steering components.

Fitment depends on the full wheel-and-tire package, not just the last number in the size code. Offset, wheel width, trim level, and even brake package can determine whether this size works cleanly on a given vehicle. Compare the current tire size, review the vehicle documentation, and check actual space at full lock and full suspension movement before treating the 245/60R18 as a direct replacement.

Buyers should compare overall diameter, section width, wheel width, and load requirements before switching to the 245/60R18. The tire stands 29.57 inches tall and measures 245 millimeters wide, so even a replacement that looks close can change stance, speedometer readings, or available clearance.

A successful size change starts with the actual vehicle and wheel setup. Check the current sidewall markings, confirm that the 18-inch wheel is the correct diameter, and measure clearance to the strut, inner liner, and outer fender. If the vehicle is used for passengers, cargo, or towing, load needs should be confirmed along with physical fit, because acceptable clearance alone does not guarantee the right replacement choice.

The 245/60R18 is a modern radial size, so it is generally more appropriate for later-model replacement use than for an earlier period-style restoration. Radial construction can improve everyday drivability, but a vehicle being judged closely for originality may call for a different size format or construction style.

Restoration goals matter just as much as raw dimensions. If the objective is a road-friendly driver, a radial fitment may be the practical answer where the vehicle supports it. If the goal is strict visual or historical accuracy, compare the original handbook, wheel specifications, and expected profile before choosing the 245/60R18, because modern metric sizing can change the look even when it physically fits.

The 245/60R18 keeps more sidewall height than many lower-profile 18-inch fitments, so it usually preserves a fuller tire shape and more cushioning over rough pavement. Its 5.79-inch sidewall can help moderate impacts that would feel sharper on a shorter-profile tire of similar width.

Ride quality is still influenced by the tire’s internal construction, the vehicle’s suspension tuning, alignment condition, and inflation maintenance. Drivers who move to a lower-profile substitute often notice a firmer response and a different visual stance, while staying with the 245/60R18 generally keeps the original balance of wheel size and sidewall height closer to what the vehicle was designed around.

The 245/60R18 is a radial size, and radial construction generally supports more settled road manners than older tire designs because the casing and tread work differently under load. With a 245-millimeter section width and a 60-series profile, this size tends to balance straight-line stability, sidewall compliance, and everyday responsiveness.

Actual steering feel depends on much more than the size code alone. Wheel width, tire design, alignment settings, suspension wear, and the age of the tire all shape how precise or soft the vehicle feels in service. Buyers replacing worn tires should compare dimensions first, then make sure the new set is matched evenly across the axle or full vehicle to keep handling behavior predictable.

Yes. The 245/60R18 stands 29.57 inches tall and turns about 682.0 revolutions per mile, so a replacement with a meaningfully different diameter can change speedometer readings and slightly alter the vehicle’s effective gearing. Even when width stays similar, rolling height can shift how the vehicle sits and responds.

Drivers often focus on width first because it is easy to see, but diameter is what changes the tire’s relationship to gearing and wheel-opening fill. A taller substitute can raise the vehicle slightly and reduce clearance in compression, while a shorter one can lower the stance and make the speedometer read differently. Compare both diameter and revolutions per mile before moving away from the 245/60R18.

A good 245/60R18 should match the vehicle’s load needs, fit the wheel correctly, and maintain the intended overall dimensions of the size. Construction consistency, casing quality, and accurate sizing matter more than marketing language, because a tire that measures correctly and works with the wheel setup will usually deliver a better ownership experience.

Buyers should compare the tire’s construction type, sidewall markings, and service intent with how the vehicle is actually used. A daily-driven crossover, SUV, or utility vehicle may prioritize predictable road manners and even wear, while a lower-mileage specialty vehicle may place more emphasis on appearance and dimensional fidelity. In either case, keeping all four tires closely matched is usually more important than chasing small differences between labels.

Yes. The 245/60R18 is a radial size, and that construction choice is part of what defines how the tire behaves in normal road use. Radials are commonly chosen where buyers want modern replacement behavior, stable tracking, and sizing that matches the expectations of later-model wheel and suspension combinations.

Construction should be viewed as part of the whole vehicle setup rather than an isolated feature. A buyer selecting the 245/60R18 should still confirm the correct dimensions, wheel compatibility, and intended use instead of assuming every tire in the size will feel identical. Differences in internal design, tread layout, and service category can still change the driving experience even within the same size code.

Full-set consistency matters because the 245/60R18 is often used on vehicles that depend on balanced road manners and even rolling diameter. Mixing tires with noticeably different wear states, constructions, or dimensional behavior can change how the vehicle tracks, responds in corners, and reacts under braking.

Matched sizing is only the starting point. Buyers should also pay attention to keeping the same construction type and similar service intent across the set, especially on vehicles used regularly on highways and in changing weather. When replacing only part of a set, compare the remaining tires for age, visible condition, and sidewall information so the 245/60R18 replacement does not introduce an uneven feel.

The 245/60R18 can age out before it wears out, especially if the vehicle sees seasonal or uneven use. Tread depth alone is not enough to judge serviceability, because time, heat cycles, sunlight, ozone exposure, and long periods of sitting can harden the rubber and change how the tire behaves.

Regular inspection is the best habit. Look for cracking, bulges, cuts, repeated air loss, and uneven wear across the tread and shoulders, and inspect more carefully before long trips or heavy-use periods. Even on a vehicle in regular service, a tire that still looks usable at a glance may be well past its best condition, so age and visible health deserve as much attention as remaining tread.

The 245/60R18 should be checked routinely for air loss, uneven wear, and visible damage, especially on vehicles that carry passengers or cargo regularly. Consistent inflation and periodic inspection help the tire maintain its intended shape, wear pattern, and road behavior.

Drivers should compare wear across all tires, inspect the shoulders and inner sidewalls, and correct alignment or suspension issues before they shorten tire life. Rotation practices depend on the vehicle and tire setup, but ignoring wear patterns is a common reason a serviceable size delivers disappointing mileage. When the 245/60R18 is used as a daily replacement tire, maintenance discipline matters more than low annual mileage.

The 245/60R18 is normally a tubeless fitment. Even so, tube use is a wheel-and-tire-system question rather than a size question, so the final decision should be confirmed against the actual wheel design and the specific tire being installed.

Modern 18-inch applications are usually built around tubeless service, but wheel condition still matters. A damaged bead seat, corrosion at the rim, or an unusual wheel design can change what is appropriate. If there is any doubt about the wheel’s suitability or the tire’s intended setup, review the current sidewall markings and consult a qualified tire professional before mounting the 245/60R18.

The 245/60R18 should be replaced when inspection shows cracking, bulges, cuts, persistent air loss, severe uneven wear, or other signs that the casing is no longer in sound condition. Replacement timing should also take tire age seriously, even when tread depth still looks acceptable.

Roadworthiness is about condition as much as dimensions. A correctly sized tire can still be a poor choice if it has aged, hardened, or been run under improper inflation long enough to damage the structure. Before highway travel or seasonal trips, inspect each 245/60R18 closely and compare all four tires for age, wear pattern, and visible deterioration rather than judging them by tread alone.

The 245/60R18 is a modern radial size intended for regular road use, but safe service depends on the condition of the tire, the correct wheel fit, and the vehicle’s actual load requirements. Size alone does not guarantee roadworthiness, and an aged or damaged tire should not be treated the same as a sound one.

Buyers should review the tire’s current sidewall markings, inspect for damage, and confirm that all four tires are appropriate for the vehicle’s duty. Highway use also places more demand on suspension condition, alignment, and heat management than short local driving does. If the vehicle carries passengers, cargo, or sees sustained speed, a careful pre-trip inspection is a better safeguard than relying on the size code by itself.

Buyers should verify wheel diameter, approved wheel width, overall diameter, section width, and load requirements before substituting the 245/60R18 for another size. A replacement can look close on paper yet still change fender clearance, speedometer behavior, or the way the tire seats on the wheel.

Documentation and physical measurement work best together. Compare the current tire size, inspect clearance at full steering lock, and make sure the 18-inch wheel and the tire’s dimensions suit the actual vehicle configuration. If the vehicle has multiple factory wheel-and-tire options, trim-specific differences can matter, so the 245/60R18 should be treated as a fitment candidate to verify rather than a universal substitute.