How Do I Buy the Correct Tire Size From Walmart and Calculate the Installed Total?

How do I find the right tire size for my car on Walmart's website?

Use the door-jamb label or owner's manual as the final fitment check, then use Walmart's search tools to locate tires that match it. The National Highway Traffic Safety Administration says to check the owner's manual or Tire and Loading Information Label on the driver's-side door edge or post for the correct size. This matters most on a used vehicle, where the tires already mounted may not be the factory-correct choice.

Read the code before clicking “add to cart.” For a tire marked P235/65R17, Consumer Reports explains that P identifies a passenger-car tire, 235 is the width in millimeters, 65 is the sidewall height expressed as a percentage of width, R means radial construction, and 17 is the wheel diameter in inches. The code is a specification, not decoration. Changing one part can change clearance, ride, or the tire's ability to carry the vehicle safely.

The U.S. Tire Manufacturers Association is direct: replacement tires should be the same recommended size, load index, and speed-rating designation as specified by the vehicle or tire manufacturer. Consumer Reports adds that the load index should be at least the number on the placard or in the manual. For context, its example says a 103 load index supports 1,929 pounds per tire. Do not trade capacity for a lower listing price.

Run a simple three-screen check before ordering. First, enter the vehicle details or tire size and save the results. Second, open the tire's specification panel and compare size, load index, and speed rating against the placard. Third, put the tire in the cart, choose the delivery or installation path offered for the selected location, and inspect the final price. If any specification does not match, stop there and ask the service location to confirm fitment before purchase.

Also check the DOT date code when the tire is available to inspect. Consumer Reports says the final four digits show the manufacturing week and year; for example, 0424 means the fourth week of 2024. This is not a substitute for correct fitment. It is a separate record to keep with the invoice.

Can Walmart install tires that are a different size from my door-jamb sticker?

Do not count on installation of a different size; the provided sources do not state Walmart's current acceptance policy, and a different size can create fitment and liability concerns. Ask the selected Auto Care Center before ordering, using the exact tire code, wheel size, load index, speed rating, and vehicle details. A vague question such as “Will these fit?” creates more cognitive load than a complete specification.

The practical rule is same specifications first, alternatives only with proof. USTMA says replacement tires should not be smaller or have lower load-carrying capacity than the originally specified tire. Consumer Reports says an alternate tire should closely match the original overall diameter and have the same or greater load capacity; it also notes that the wheel needs the correct lug-hole pattern and offset. Matching the rim diameter alone is not enough.

Why be strict? Consumer Reports warns that an inadequately matched wheel-and-tire combination can make the speedometer inaccurate, alter handling, interfere with brake function, or create brake-clearance problems. Its near-equivalent example compares P195/60R15 at 24.2 inches overall diameter with P205/55R15 at 23.9 inches, with both using a load index of 87. That example explains the test: compare the complete specification, not just a tire's width or its wheel diameter.

TPMS belongs in the conversation as well. NHTSA says passenger cars, light trucks, and vans from model year 2008 onward are required to have a tire pressure monitoring system. Ask the service desk this exact question: “Does this quoted installed total include the required TPMS or valve-stem parts for my vehicle?” The answer affects the total and prevents a surprise after the tires arrive.

Changing tire size also does not automatically erase a vehicle warranty. The Federal Trade Commission says it is illegal for a dealer to deny warranty coverage simply because routine maintenance or repairs were performed by an independent shop, retail chain, or owner. But if improper third-party work caused damage, coverage for that damage can be denied. Keep the placard details, product specifications, and invoice together.

Does Walmart install tires bought somewhere else?

The provided sources do not document Walmart's current policy on installing customer-supplied tires, so confirm that policy with the specific Auto Care Center before buying elsewhere. Get a clear answer on whether it accepts outside tires, what it charges, and what work is included. Do not buy first and treat the installation counter as a backup plan.

Use an installed-total worksheet to compare Walmart, a local shop, and an online tire seller with a separate installer. The tire price is only one line. Discount Tire's published invoice terms show why: its installation charge includes labor and parts needed to install or replace a tire, such as a TPMS rebuild kit or rubber valve stem, but state-mandated tire fees and waste-tire disposal fees may be separate. The company also says installation and maintenance charges can vary by market and complexity.

The comparison should end with one number: the confirmed amount due for four correctly specified tires installed on the vehicle. Then compare service terms. Discount Tire states that its life-of-tire maintenance can include rotation, rebalance, flat repair, inspection, and air checks, but those published terms describe Discount Tire, not Walmart. Ask every provider to state its own terms.

There is one more safety choice after buying only one or two tires. USTMA advises that, when replacing two tires, the new pair should go on the rear axle because better rear grip can help prevent oversteer and loss of stability. For a single replacement, it says the new tire should be paired with the deepest-tread tire and placed on the rear axle if a single replacement is unavoidable. Confirm the shop's plan before the work begins.