245/70R15 Tire Size Guide

The 245/70R15 code gives you the tire's basic dimensions and construction. In this size, 245 is the section width in millimeters, 70 is the aspect ratio, R means radial construction, and 15 is the wheel diameter in inches.

Unlike an older alphanumeric or numeric size, the 245/70R15 tells you the width and profile directly in the code itself. What it does not tell you by itself is the exact tread width, load capability, speed rating, or approved wheel-width range, so those details still need to be checked on the actual tire and wheel combination you plan to use.

The 245/70R15 fits a 15-inch wheel, which is 381.0 millimeters in diameter. The rim diameter number is exact and cannot be substituted with a 14-inch, 16-inch, or any other wheel diameter.

Wheel diameter is only one part of fitment, because wheel width and offset still affect how the tire sits on the vehicle. Even when the diameter is correct, buyers should make sure the wheel itself is appropriate for the tire and that the mounted combination clears the fenders, steering parts, and suspension through the full range of travel.

The 245/70R15 has a section width of 245 millimeters, which works out to 9.65 inches. Section width measures the tire at its widest point from sidewall to sidewall when inflated.

Section width is not the same as tread contact width, which is usually narrower than the sidewall-to-sidewall measurement. For real-world fitment, section width is the number to watch first because it is the dimension most likely to create rubbing at the fender lip, inner wheelhouse, frame, or nearby suspension components.

The 245/70R15 has an overall diameter of 28.5 inches, or about 723.9 millimeters. Overall diameter is the full height of the inflated tire measured from one outer edge to the other through the center.

Overall diameter matters because it affects ride height, wheel-opening fill, and the way the tire compares with possible substitute sizes. A noticeable change in diameter can alter stance and speedometer behavior, so buyers trying to keep the same look or driving feel should compare this number closely before changing to another size.

The 245/70R15 has a sidewall height of 6.75 inches, which is 171.5 millimeters. That figure comes from the 70-series profile, meaning each sidewall is 70 percent of the 245-millimeter section width.

Sidewall height shapes both appearance and road feel. A tire with this much sidewall usually fills the wheel opening more than a lower-profile size and can provide more compliance over imperfect pavement, while still keeping the broad modern radial footprint that many replacement buyers want on 15-inch wheels.

The 245/70R15 turns about 707.6 revolutions per mile. That means the tire completes just over seven hundred full rotations while covering one mile of travel.

Revolutions per mile are useful when comparing this size with another diameter, because a different rotation rate can change speedometer and odometer readings. When a substitute tire turns more or fewer times per mile, the vehicle covers a different actual distance than the instruments expect, so that comparison is worth making before switching sizes.

No, the 245/70R15 should not be treated as interchangeable with every other 15-inch size. The 15 in the code only confirms wheel diameter, while the 245 width and 70-series profile determine section width, sidewall height, and overall diameter.

Vehicles can vary widely in fender room, steering sweep, wheel offset, and suspension clearance even when they share a 15-inch wheel. Compare the 245/70R15 against the size already on the vehicle, check for rubbing at full lock and full compression, and confirm that the tire's load capability matches the way the vehicle is actually used.

The 245/70R15 is often a sensible replacement size when the vehicle is already set up around a modern radial with similar proportions. Its broad section width and 70-series sidewall give it a substantial look without moving into an especially short sidewall profile.

If the goal is to preserve familiar stance and day-to-day drivability, compare overall diameter, wheel width, and current clearances before changing anything. For a vehicle being judged closely on authenticity, radial construction may improve road manners, but buyers should still decide whether that construction matches the character they want from the finished vehicle.

The key checks for the 245/70R15 are wheel diameter, wheel width, section-width clearance, and overall tire height. The tire must go on a true 15-inch wheel, and the vehicle needs enough room for a tire that is 9.65 inches wide and 28.5 inches tall.

Start by comparing the new size to the current tire and wheel package rather than looking at size code alone. Then inspect the inside sidewall area, outer fender lip, front steering clearance, and rear suspension travel, because those are the places where a wide 70-series radial most often reveals a mismatch.

The 245/70R15 combines a relatively tall 6.75-inch sidewall with radial construction, so it generally offers a balanced road feel rather than an ultra-low-profile response. Its 28.5-inch overall diameter and 245-millimeter width give it a fuller, more substantial stance than narrower 15-inch passenger sizes.

Road behavior still depends on the vehicle, alignment, wheel width, suspension condition, and the age of the tire itself. On a properly sorted vehicle, this size usually appeals to buyers who want a blend of everyday drivability and a strong visual proportion without moving to an extreme performance profile.

The 245/70R15 leans toward a middle ground rather than either extreme. A 70-series sidewall leaves more cushioning than a shorter-profile 15-inch radial, while the 245-millimeter section width still provides a broad footprint that can support stable steering feel.

Drivers looking for sharper turn-in often move to lower-profile combinations, but that can change ride quality and appearance. Buyers who want to retain a taller sidewall, reasonable wheel-opening fill, and the more forgiving behavior that often suits street-driven older vehicles may find this size better aligned with those priorities.

Changing away from the 245/70R15's 28.5-inch overall diameter will affect more than appearance. A shorter tire can lower the vehicle slightly and make the wheel opening look less full, while a taller one can raise the stance and create additional clearance concerns.

Diameter changes also affect revolutions per mile, and this size turns about 707.6 revs per mile. If a substitute differs meaningfully, the speedometer and odometer may no longer track the same way, so compare overall height and rotation rate together instead of choosing by wheel diameter alone.

The main priorities for a 245/70R15 are correct size, radial construction that matches the intended use, and dimensions that work with the vehicle's wheel and clearance limits. On a size like this, consistency in overall diameter and section width matters as much as the name on the sidewall.

A good buying decision starts with how the tire will be used. Some owners want a regular-use replacement with predictable road manners, while others want a size that still looks appropriate on an older 15-inch wheel package, so it makes sense to weigh drivability, proportions, and fitment together.

Yes, construction quality matters because the 245/70R15 is a relatively wide radial that asks the tire to carry its shape consistently across steering, braking, and ordinary road impacts. Good radial construction supports predictable casing behavior and helps the tire maintain the proportions the size is meant to deliver.

Buyers should compare the tire's intended use, wheel compatibility, and overall specifications instead of focusing only on the nominal size. On a vehicle that sees regular driving, even small differences in build quality can show up as differences in smoothness, balance behavior, or how evenly the tire wears over time.

Matching all four 245/70R15 tires is usually the best practice when the goal is consistent handling, appearance, and wear behavior. Even when two tires share the same size code, differences in actual diameter, casing shape, or tread design can change how the vehicle feels.

Set consistency matters especially on vehicles that are sensitive to stance or steering feel. Keeping the same construction type and similar dimensions at each corner makes it easier to predict clearance, maintain a uniform look, and avoid odd road manners that sometimes appear when mixed tires wear or flex differently.

A 245/70R15 on a vehicle in regular service should be inspected routinely for uneven wear, cuts, bulges, air loss, and visible cracking. Regular checks matter on any radial tire, but they are especially important when the vehicle sees highway miles, seasonal weather changes, or heavier passenger and cargo use.

Inspection should include both shoulders, the center tread, and the inner sidewall area that is harder to see when the tire is mounted. Drivers who catch alignment wear or impact damage early usually have a much better chance of correcting the cause before the tire's shape, ride quality, or service life is affected.

Good tread depth alone does not tell the whole story on the 245/70R15. Tires can age out before they wear out, especially when they are exposed to heat, sunlight, ozone, long periods of underuse, or repeated service on rough roads.

Age-related hardening and cracking can reduce confidence even when the remaining tread looks acceptable at a glance. Review the tire's date information, watch for sidewall deterioration, and have the tire evaluated if there is any doubt about condition, because a low-mileage tire can still be too old for dependable road use.

The 245/70R15 is normally a tubeless fitment. Even so, tube use is a wheel-and-tire-system question rather than a size question, so the actual wheel design and the specific tire being used still need to be confirmed together.

Original wheel condition, bead-seat design, and the construction of the tire itself all influence whether a tube is appropriate. Before mounting, inspect the wheel carefully and verify the intended setup with the tire's current markings and manufacturer guidance, especially if the wheel is older, modified, or in questionable condition.

The 245/70R15 should be replaced when inspection shows cracking, bulges, repeated air loss, impact damage, exposed cords, or wear severe enough to compromise traction and casing integrity. Replacement timing also depends on age, because an older tire can become less trustworthy even when the tread still looks usable.

Before any longer trip, inspect all four tires closely and pay attention to changes in vibration, pull, or steering feel that were not present before. Drivers should treat visible condition, service history, and time in service as equally important factors rather than relying on tread depth alone.

The 245/70R15 is a modern radial size, but road suitability still depends on the actual tire's condition, construction details, load capability, and how it is mounted on the vehicle. A size code alone cannot confirm whether any individual tire is appropriate for current highway or interstate use.

Buyers should confirm that the tire matches the vehicle's load needs, that the wheel is correct, and that the casing is in sound condition before regular road use. Checking present-day sidewall markings, age, and overall condition is more important than assuming that every tire in this size will behave the same way.

The most important pre-trip checks for the 245/70R15 are air retention, visible condition, even wear, and adequate clearance around the tire at straight ahead and full steering lock. A close look for cuts, bulges, cracking, and embedded damage is time well spent before sustained highway driving.

Long trips put more heat into the tire than short local drives, which can reveal problems that stayed hidden around town. Verify that the wheel and tire are paired correctly, confirm the vehicle is not overloaded for the tires being used, and address any age or condition concerns before leaving rather than after symptoms appear on the road.