To read Toyota Tacoma tire specifications, start with the sidewall code for tire type, section width, aspect ratio, construction, wheel diameter, load index, and speed symbol. Then use the DOT/TIN for production date and the other sidewall marks for pressure, load, tread, or service information. For replacement fitment and cold pressure, the sidewall is not enough: confirm the Tire and Loading Information Label on the driver-side doorjamb and the owner’s manual for your exact model year and trim.
Quick Answer
In P265/70R16 113S, P identifies a P-metric tire, 265 is nominal section width in millimeters, 70 is the sidewall-to-width ratio, R means radial construction, and 16 is wheel diameter in inches. The 113 load index equals 2,535 pounds per tire, while S is a 112-mph speed category.
Key Takeaways
- Use your Tacoma’s doorjamb label and owner’s manual as the primary sources for tire size and cold inflation pressure.
- A no-prefix metric tire is not automatically weaker, and an LT tire is not automatically the best replacement.
- Match the required size, construction, load capacity, speed category, wheel specifications, and intended use.
- UTQG grades do not appear on every tire and do not guarantee mileage or complete wet-weather performance.
- Changing overall tire diameter can affect clearance, speedometer accuracy, gearing, handling, spare-tire compatibility, and four-wheel-drive operation.
Last updated: September 11, 2026.
Source basis: This guide cross-checks Toyota model-year documentation with NHTSA TireWise and the 2024 NHTSA UTQG guide. It explains how to decode a sidewall; it does not replace the specifications for your exact Tacoma.
How to Read a Tacoma Tire Size Code
A code such as P265/70R16 113S can be separated into seven parts. Each part describes a different tire characteristic.
| Marking | Meaning | Example |
|---|---|---|
| P | Sizing system or intended service type | P-metric passenger-vehicle tire |
| 265 | Nominal section width in millimeters | Approximately 265 mm at the widest sidewall points |
| 70 | Aspect ratio | Sidewall height is approximately 70% of 265 mm |
| R | Construction | Radial construction |
| 16 | Wheel or rim diameter | Fits a 16-inch wheel diameter |
| 113 | Load index | Up to 2,535 lb or 1,150 kg under the rating’s specified conditions |
| S | Speed symbol | 112 mph or 180 km/h category under standardized conditions |
The load index and speed symbol describe tested tire capabilities. They do not change the Tacoma’s certified payload, Gross Vehicle Weight Rating, axle ratings, tow rating, or legal speed limits.
Warning: Do not select a replacement tire from the sidewall code alone. Verify the complete specification on your truck’s doorjamb label and in the correct Toyota owner’s manual. A tire can share the same basic size while having an unsuitable load rating, construction, wheel requirement, or service description.
Three-source fitment check: Use the Tacoma’s doorjamb label for the original tire specification and cold pressure, the tire sidewall for the tire actually installed, and the tire manufacturer’s specification sheet for approved rim width and measured dimensions. If those sources do not line up, verify the setup before ordering or installing a replacement.
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What Do P, Metric, and LT Mean on Tacoma Tires?
The letters before or after a tire size identify its sizing system or intended service category. They do not provide a complete measure of strength or suitability.
- P: A P-metric tire designed under passenger-vehicle sizing and load standards. P-metric tires are commonly used on cars, SUVs, and light pickups.
- No prefix: A metric or Euro-metric size. The missing P does not mean the tire has inadequate capacity. Check its load index, service description, inflation requirements, and approved application.
- LT: A light-truck tire. LT tires are designed around light-truck load and inflation tables and may show a load range or separate single and dual load indexes.
- T: A temporary-use spare tire. Follow all speed, distance, and inflation restrictions shown on the tire and in the owner’s manual.
An LT tire may provide tougher construction for demanding loads or off-road use, but that does not make it the best choice for every Tacoma. Depending on the model, an LT tire can be heavier, firmer, noisier, and less efficient. It may also require more inflation pressure than a similar-size P-metric tire to carry the intended load.
Do not switch between P-metric, metric, and LT tires by comparing size characters alone. A qualified tire professional should verify the correct load table, wheel compatibility, inflation pressure, and axle requirements. For the Tacoma-specific tradeoffs among Standard Load, XL, and LT load ranges, see Toyota Tacoma tire ply rating and load range explained.
What Do Section Width and Aspect Ratio Mean?
In 265/70, the number 265 is the tire’s nominal section width in millimeters. Section width is measured across the widest points of the inflated sidewalls on a specified measuring rim. It is not the same as tread width, which is the width of the rubber contacting the road.
The number 70 is the aspect ratio. It means the approximate sidewall height is 70% of the nominal section width:
265 mm × 0.70 = 185.5 mm, or approximately 7.3 inches.
You can estimate overall tire diameter by adding two sidewall heights to the wheel diameter:
(185.5 mm × 2) + (16 × 25.4 mm) = 777.4 mm, or approximately 30.6 inches.
This calculation is theoretical. Actual mounted dimensions vary by tire model, tread design, approved wheel width, inflation pressure, and load. Use the tire manufacturer’s specification sheet when clearance or circumference matters.
A taller sidewall can provide more impact absorption and wheel protection on rough surfaces. A shorter sidewall may produce a more immediate steering response, but tire construction, tread design, pressure, wheel width, and suspension setup also affect ride and handling. Width alone does not guarantee more traction.
What Do R, D, RF, and Run-Flat Marks Mean?
The construction letter appears before the wheel-diameter number. In a size such as 265/70R16, R means radial construction and 16 means the tire mounts on a wheel with a 16-inch nominal diameter.
Radial Versus Bias Construction
Radial tires use body cords arranged approximately perpendicular to the direction of travel. They are the normal construction for modern road-going pickup tires. A D or a dash in some legacy sizes can identify diagonal or bias construction.
Do not substitute a bias tire for a radial tire merely because the wheel diameter matches. Mixing construction types can change steering response, heat buildup, ride, and handling. Use the construction specified by Toyota and the tire manufacturer.
RF and Run-Flat Markings
RF does not have one universal meaning in every sidewall code. On some Euro-metric tires, RF means reinforced and is similar to an extra-load designation. Run-flat tires may instead use manufacturer-specific marks such as RFT, ROF, SSR, ZP, or another branded symbol.
Confirm run-flat capability in the tire manufacturer’s technical information rather than relying on two letters. Run-flat tires also require a functioning pressure-monitoring system because their reinforced construction can make pressure loss difficult to see.
A run-flat tire permits limited operation after some pressure-loss events, subject to the manufacturer’s speed, distance, load, and damage restrictions. It is not puncture-proof, and sidewall or structural damage may make continued driving unsafe. Do not assume that fitting run-flat tires automatically makes your spare tire unnecessary.
Note: The wheel-diameter number must match the wheel exactly. A 17-inch tire cannot mount safely on a 16-inch wheel, even when the tire’s overall diameter appears similar.
What Do Load Index and Speed Rating Mean?
The service description at the end of a tire size combines the load index and speed symbol. For example, 113S means a load index of 113 and an S speed category.
- Load index 113: Up to 2,535 pounds or 1,150 kilograms per tire under the applicable load-and-inflation standard.
- Speed symbol S: A maximum tested category of 112 mph or 180 km/h under specified laboratory and operating conditions.
The speed symbol is not a recommended driving speed. Heat, inflation pressure, vehicle load, damage, repairs, road conditions, and tire wear can reduce safe operating capability.
Replacement tires should meet Toyota’s required load capacity and speed category unless Toyota or the tire manufacturer provides another approved specification. A numerically higher load index may be acceptable only when the tire’s size, construction, pressure requirements, wheel compatibility, and other specifications also fit the vehicle.
Load Index Versus Load Range
Load index and load range are related but different:
- Load index is a numerical code connected to a maximum load in an applicable load table.
- Load range appears mainly on LT tires and identifies the tire’s load-and-inflation category. Letters such as C, D, or E are associated with historical ply ratings, but they do not necessarily describe the tire’s actual number of physical plies.
- XL or Extra Load identifies a tire designed for a higher load at a higher permitted pressure than a standard-load tire of the same basic size.
- Dual indexes, such as 121/118, give separate capacities for single-wheel and dual-wheel installations. A Tacoma normally uses the single-wheel value.
Warning: Higher-capacity tires do not increase the Tacoma’s door-sticker payload, GVWR, front or rear GAWR, hitch rating, or tow rating. The truck remains limited by its lowest-rated component and Toyota’s certified limits.
What Does UTQG Mean on Tacoma Tires?
The Uniform Tire Quality Grading system provides three comparative grades on many passenger-car tires sold in the United States. It does not apply to every tire. The 2024 NHTSA UTQG guide lists exceptions that include deep-tread tires, winter-type snow tires, temporary spares, and tires with certain small rim diameters. Many LT tires and specialty tires therefore may not display a UTQG code.
A marking such as 600 A A is read as follows:
- Treadwear 600: A comparative wear grade based on controlled testing. It is not a 60,000-mile warranty or a reliable prediction of your exact mileage.
- Traction A: A controlled wet straight-line stopping grade. It does not measure dry braking, cornering grip, acceleration, hydroplaning resistance, or snow performance.
- Temperature A: The highest of the A, B, and C heat-resistance grades under the federal test procedure.
Use UTQG to compare broadly similar passenger tires, but also consider tire type, wet and dry testing, snow capability, road noise, ride, rolling resistance, warranty terms, and independent testing. A higher treadwear number does not automatically mean that one tire is safer or better for every use.
Other Sidewall Marks You May See
- MAX LOAD: The tire’s maximum rated load under the stated conditions. It is not the truck’s payload rating.
- MAX PRESS: A maximum tire limit, not the recommended everyday pressure for your Tacoma.
- M+S, M/S, or M&S: A mud-and-snow tread designation. It is not the same as a severe-snow performance certification.
- Three-peak mountain snowflake: A severe-snow service symbol based on a defined traction test.
- ROTATION with an arrow: Shows the required rolling direction for a directional tire.
- INSIDE and OUTSIDE: Shows the correct mounting orientation for an asymmetric tire.
- TUBELESS or TL: Identifies a tire intended to operate without a separate inner tube on a compatible wheel.
- TWI: Marks the location of molded treadwear indicators in the tread grooves.
Directional and asymmetric instructions affect mounting, rotation patterns, water evacuation, noise, and handling. Check all four tires after installation to confirm that arrows and inside/outside markings face the correct way.
How Do You Find the DOT Date Code and Tire Recall Information?
The U.S. Tire Identification Number normally begins with DOT. The complete TIN includes manufacturer and tire-identification characters, followed by a four-digit date code. The first two date digits identify the production week, and the final two identify the year.
For example, a code ending in 2325 identifies a tire manufactured during the 23rd week of 2025. The full TIN may appear on only one sidewall, so inspect the inner side if you see a shortened code outside.
Pro Tip: Photograph the complete TIN on every new tire before installation. You will then have the manufacturer, plant, tire code, and date information available without crawling under the truck during a recall check.
Tires made before 2000 used a three-digit date code. Any tire old enough to have that format is unsuitable for normal continued service regardless of visible tread depth.
Tire aging is affected by time, heat, sunlight, storage, inflation, load, and use. According to NHTSA TireWise, aging cannot always be detected through appearance alone, and some vehicle or tire manufacturers recommend replacement within a six-to-ten-year range. Follow the earliest applicable guidance from Toyota and the tire manufacturer, and have older tires inspected by a qualified professional.
Use the NHTSA recall search to check tires by manufacturer, tire line, size, and other identifying information. Follow recall instructions promptly if your tire is affected.
What Tire Size Does a Toyota Tacoma Use?
Toyota Tacoma tire sizes vary by model year, trim, cab, drivetrain, axle rating, and wheel package. There is no single “Tacoma tire size.” Toyota’s model-year manuals list different tire, spare, pressure, and wheel combinations by configuration. Sizes such as 245/75R16 and 265/70R16 appear on some Tacoma configurations, but they are not universal specifications for every Tacoma.
Use the driver-side Tire and Loading Information Label first. You can also select your model year through Toyota’s owner’s manual portal. If the current tires disagree with the placard, do not assume the tires presently mounted on the truck are correct.
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What to Check Before Installing a Larger Size
Aftermarket sizes such as 275/70R17 or 265/75R17 are not universal drop-in replacements. Compared with a theoretical 265/70R17:
- 275/70R17 is approximately 1.7% larger in overall diameter.
- 265/75R17 is approximately 3.3% larger in overall diameter.
Actual measurements vary by tire model. Even a modest change can affect:
- Full-lock and suspension-compression clearance
- Fender liners, mud flaps, body mounts, and upper control arms
- Wheel width, offset, backspacing, and brake clearance
- Speedometer and odometer accuracy
- Effective gearing, acceleration, braking, and fuel use
- ABS, traction-control, stability-control, and driver-assistance calibration
- Spare-tire fit and emergency use
- Snow-chain clearance
- Four-wheel-drive drivetrain operation when tire circumferences do not match
Do not rely only on statements that a size fits a “stock Tacoma.” Confirm fitment for your exact year, trim, suspension, alignment settings, wheel specifications, and intended load. Check clearance while steering in both directions and through normal suspension travel.
What Should You Check Before Changing Tacoma Tires?
- Read the doorjamb label. Record the original tire size, seating capacity, load information, and recommended cold pressures.
- Check the correct Toyota manual. Confirm any model-specific instructions, rotation restrictions, spare-tire guidance, and TPMS procedures.
- Match the complete service description. Verify size, construction, load index, speed symbol, load range, and XL or LT designation where applicable.
- Verify the wheel. Confirm diameter, approved width range, offset, load capacity, condition, and valve-hole compatibility.
- Check clearance. Inspect the tire at full steering lock and throughout available suspension travel.
- Keep the set compatible. Avoid mixing substantially different sizes, constructions, tread types, or circumferences, especially on a four-wheel-drive truck.
- Inspect the spare. Confirm that its pressure, age, size, and use restrictions remain suitable after any tire-size change.
- Service the valves and TPMS. Inspect seals, stems, sensors, and retaining hardware during installation.
- Balance and align. Balance each new tire and correct alignment problems that could cause pulling or irregular wear.
- Use Toyota’s wheel-nut procedure. Tighten the wheel fasteners in the specified sequence and to the specification in the owner’s manual.
- Perform a final check. Confirm pressure, mounting direction, clearance, TPMS operation, and wheel-fastener security.
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Proper Inflation Pressure
Use the cold inflation pressure on the Tacoma’s Tire and Loading Information Label, not the maximum pressure molded into the tire sidewall. NHTSA defines a cold check as one performed after the vehicle has been parked for at least three hours. For a field-by-field explanation of the label, see how to decode the Tacoma tire-pressure placard.
Check all road tires and the spare at least monthly and before long trips, towing, or carrying a heavy load. Use an accurate gauge and check pressure before driving when possible. Temperature changes can alter pressure even when no leak exists.
The Tire Pressure Monitoring System is a warning system, not a replacement for manual checks. A TPMS lamp generally appears only after a tire becomes significantly underinflated. If the lamp flashes before remaining illuminated, the system may have a fault that requires service.
Load Capacity Matching
Replacement tires must provide enough capacity for the applicable axle loads at the pressure specified for the installation. Do not estimate safe payload by multiplying the sidewall maximum load by four.
The Tacoma’s payload must account for passengers, cargo, accessories, hitch equipment, and trailer tongue weight. Tires with a higher load index can provide additional tire capacity, but they cannot raise the truck’s certified payload, GVWR, GAWR, or towing limit.
When switching from P-metric to LT tires or between load ranges, use the correct published load-and-inflation table. The same numerical pressure can support different loads in different tire systems.
TPMS and Valve Care
Ask the installer to inspect TPMS sensors, sealing grommets, valve cores, retaining nuts, and valve stems whenever tires are removed. Rubber stems can crack with age, while metal components can corrode or become damaged through incorrect tightening.
Some sensor replacements or wheel changes require registration, initialization, or a relearn procedure. Follow the instructions for your Tacoma’s model year and confirm that the warning lamp operates normally after installation.
Frequently Asked Questions
How do you read a Toyota tire size?
Read the code from left to right. In P265/70R16 113S, P identifies the P-metric system, 265 is nominal section width, 70 is aspect ratio, R means radial, 16 is wheel diameter, 113 is load index, and S is the speed symbol. Then compare the complete specification with the Toyota doorjamb label.
What does 265/70R17 mean?
The tire has a nominal section width of 265 millimeters. Its sidewall height is approximately 70% of that width, it uses radial construction, and it fits a 17-inch wheel. The code does not include the tire’s load index or speed symbol, which normally appear immediately afterward.
Can I replace P-metric Tacoma tires with LT tires?
Possibly, but the LT tire must fit the wheel and vehicle, support the required load at an appropriate pressure, maintain acceptable clearance, and suit your driving needs. LT tires may be heavier and firmer and can require different inflation pressure. Have the conversion checked with the correct load tables.
Is a higher load index always better?
No. The tire must still have the correct size, construction, pressure requirements, wheel fit, and handling characteristics. A higher tire load index also does not increase the Tacoma’s certified payload, axle rating, GVWR, or towing capacity.
Should I use the maximum pressure printed on the tire sidewall?
No. Use the recommended cold pressure on the Tacoma’s Tire and Loading Information Label for the original setup. The sidewall maximum is a tire limit, not the normal pressure target for the truck. Check pressure when the tires are cold and follow Toyota or tire-manufacturer guidance for an approved non-original setup.
How can I tell how old a tire is?
Find the complete DOT Tire Identification Number and read its final four digits. The first two identify the production week and the last two identify the year. A code ending in 2325 means the tire was made in the 23rd week of 2025. Check both sidewalls because the complete number may appear on only one side.
Can I install larger Tacoma tires without a lift?
That depends on the model year, trim, wheel width and offset, alignment, tire model, suspension, and actual measured dimensions. A size that clears during straight driving may rub at full steering lock or suspension compression. Verify fitment on the exact truck rather than relying on a generic Tacoma size list.
Conclusion
Reading a Tacoma tire code starts with the service designation, section width, aspect ratio, construction, and wheel diameter. The load index, speed symbol, load range, UTQG grades, DOT/TIN, and other markings then provide additional information about the tire’s capacity and intended use.
Those markings do not replace model-specific fitment information. Before buying or installing tires, confirm the specification on the driver-side doorjamb label and in the correct Toyota owner’s manual. Check wheel compatibility, clearance, cold pressure, load requirements, TPMS operation, spare compatibility, and the effect of any diameter change. When a specification is unclear, use a qualified tire professional rather than relying on a generic size list.
Sources
- NHTSA TireWise — tire sizing, pressure, tread, TPMS, aging, and maintenance guidance.
- NHTSA Consumer Guide to Uniform Tire Quality Grading — UTQG scope, exclusions, and grading information.
- NHTSA Recalls — official tire and vehicle recall searches.
- Toyota Owner’s Manuals and Warranty Information — model-year-specific tire, pressure, TPMS, and wheel guidance.
