2018 Tesla Tire Fitment Guide

2018 Tesla vehicles use six sizes across two models. The Model 3 uses 235/45R18, 235/40R19, and 235/35R20, while the Model S uses 245/45R19, 245/35R21, and 265/35R21. The available rim width ranges are 7.5 to 9.0 inches or 7.5 to 9 inches for 235/45R18, 8 to 9.5 inches for 235/40R19, 8 to 9.5 inches for 235/35R20, and 7.5 to 9.0 inches or 7.5 to 9 inches for 245/45R19.

The practical takeaway is that 2018 Tesla fitment starts with model identification, not just year and make. A Model 3 owner still needs to confirm whether the car has 18-, 19-, or 20-inch wheels, while a Model S owner needs to confirm whether the car uses 19-inch wheels or the 21-inch package. Matching the wheel diameter first narrows the search quickly and helps avoid choosing a tire that fits a different Tesla model entirely.

On a 2018 Tesla, 235/45R18 is a metric radial size. The 235 is the section width in millimeters, 45 is the aspect ratio, meaning the sidewall height is 45 percent of the section width, R means radial construction, and 18 is the wheel diameter in inches. On 2018 Tesla applications, this size belongs to the Model 3 and is offered in Blackwall radial form with W and Y speed-rated options depending on the tire chosen.

That code matters because it tells you both physical fit and overall profile. A 235/45R18 has a taller sidewall than the 235/35R20 used on some other 2018 Tesla Model 3 setups, so it is not simply a matter of picking whichever 235-width tire looks close. Confirm the exact wheel diameter on the car, then compare the available tires in that exact size for speed rating, load marking, and preferred driving character.

No, 2018 Tesla models do not use the same tire sizes. The Model 3 uses three sizes in the 235-width range on 18-, 19-, and 20-inch wheels, while the Model S uses a different set of sizes in 245- and 265-width form on 19- and 21-inch wheels. Even when both models use a 19-inch wheel option, the actual tire sizes are different between Model 3 and Model S.

That means year and make alone are not enough to choose correctly. A 2018 Tesla buyer should verify the model first, then check the wheel package already on the car, and only then compare products. This matters even more on Model S cars with 21-inch fitments, where the front and rear size family can differ and the correct choice depends on the exact wheel setup rather than a broad Tesla-wide replacement approach.

The available 2018 Tesla products here use Blackwall sidewalls throughout the covered sizes. That applies to 235/40R19, 235/45R18, 235/35R20, and 245/45R19, with BFGoodrich and Nitto represented depending on size. Blackwall styling suits the modern, performance-oriented appearance expected on late-model Tesla sedans and aligns with the understated sidewall look most owners associate with current EV wheel and tire packages.

For a 2018 Tesla owner, that simplifies the cosmetic decision because the main differences come from size, brand, and speed rating rather than from wide whitewalls, redlines, or other vintage sidewall treatments. Once you confirm the exact fitment, you can focus on whether you want an all-season or more performance-focused radial and whether the specific speed and load markings match how the car will be used.

BFGoodrich and Nitto both cover portions of the 2018 Tesla range here. BFGoodrich appears in 235/40R19, 235/45R18, 235/35R20, and 245/45R19, while Nitto appears in 235/35R20 and 245/45R19. All of these are radial applications, and all of the available sidewall treatments are Blackwall.

Brand choice on a 2018 Tesla usually comes after the model and wheel diameter are confirmed. A Model 3 owner on 18-inch wheels will be looking at BFGoodrich options in 235/45R18, while a Model S owner on 19-inch wheels can compare BFGoodrich and Nitto within 245/45R19. That makes the selection process more about the exact fitment and the specific tire’s speed or load marking than about broad brand loyalty alone.

For 2018 Tesla fitments where both appear, the BFGoodrich g-Force Comp 2 A/S and g-Force Phenom T/A differ in series, speed marking, and some published fitment details. In 235/45R18 for the Model 3, the Comp 2 A/S appears with a W speed rating, while the Phenom T/A appears with a Y speed rating and a 1,653-pound load figure at 50 psi. In 245/45R19 for the Model S, the Comp 2 A/S again appears with a W speed rating, while the Phenom T/A carries a Y speed rating and a 1,874-pound load figure at 50 psi.

That comparison gives a Tesla owner a useful way to narrow choices within the same size. If two tires fit the same wheel diameter and basic dimensions, the deciding factors may come down to the exact speed symbol, load marking, and the product line you prefer. It is worth checking the sidewall marking on the exact tire you choose so the replacement matches the intended use of the car rather than only the nominal size.

Rim width guidance is available for several 2018 Tesla sizes. The 235/40R19 fits 8 to 9.5 inch rims, the 235/45R18 fits 7.5 to 9.0 inch or 7.5 to 9 inch rims depending on product, the 235/35R20 fits 8 to 9.5 inch rims, and the 245/45R19 fits 7.5 to 9.0 inch or 7.5 to 9 inch rims depending on product. Those ranges apply to the specific tire size, not to every Tesla wheel across the lineup.

Rim width matters because two tires with the same wheel diameter can still have different approved wheel-width windows. Before ordering, verify the actual wheel width stamped on the wheel or confirm it from the car’s wheel specification. That is especially useful when a Tesla has aftermarket wheels, because a tire that matches the diameter may still fall outside the manufacturer’s approved rim-width range.

The available 2018 Tesla tires covered here are modern radial passenger sizes, and their sidewall markings do not indicate tube-type construction. Sizes such as 235/40ZR19, 235/45ZR18, 235/35ZR20, and 245/45ZR19 are treated as tubeless radial applications in normal passenger-car use. That fits the design expectations of late-model Tesla wheels and modern high-performance tire construction.

In practice, a 2018 Tesla owner should focus less on tubes and more on the condition of the wheel, bead seat, valve stem, and tire pressure monitoring components. If the car has factory-style modern wheels, tubeless service is the normal setup. The key check before installation is that the exact tire and wheel combination is appropriate for each other, especially on cars that may have been fitted with non-original wheel packages.

No, the original 2018 Tesla wheels cannot be treated as universal across all six tire sizes. The Model 3 uses 18-, 19-, and 20-inch fitments, while the Model S uses 19- and 21-inch fitments, so tire diameter at the wheel must match the wheel already on the car. A 235/45R18 cannot mount on a 19-inch wheel, and a 245/35R21 cannot mount on a 19-inch wheel, even though both are correct somewhere within the 2018 Tesla range.

The safest approach is to read the current tire size on the car and verify the wheel diameter before selecting a replacement. If the car has changed hands or wears aftermarket wheels, do not assume the present setup matches factory delivery. Tesla fitment can also be package-specific within the same model, so confirming the wheel and tire combination already in service is more reliable than choosing by year alone.

A 2018 Tesla should be stored in a cool, dry, dark space with the tires protected from direct sunlight, electric motors that create ozone, solvents, and long-term moisture exposure. Keep the tires inflated to an appropriate storage pressure and move the car occasionally so the same contact patch does not carry the load for months at a time. Because these are radial tires, they generally tolerate storage better than older bias-ply designs, but neglect still accelerates aging.

Good storage habits protect more than the tread. They help preserve sidewall flexibility, reduce the chance of weather checking, and make it easier to catch a slow pressure loss before the tire sits underinflated for an extended period. If the Tesla will be parked for a long season, clean the tires, keep the floor dry, and inspect pressure and sidewalls before the car returns to regular road use.

Tires on a 2018 Tesla should be judged by age as much as by mileage. A good collector-vehicle rule is to begin close inspection and professional evaluation once tires reach roughly five to seven years of service, with replacement becoming a serious consideration as they approach ten years, even if tread remains. The DOT date code on each tire sidewall is the clearest way to establish its actual age.

That age-based approach matters because many Teslas accumulate uneven patterns of use: some are driven daily, while others spend long periods parked. Electric torque, vehicle weight, and storage conditions can all affect how a tire ages and wears. If a 2018 Tesla still carries older tires with visible cracking, hardening, vibration, or repeated pressure loss, age should outweigh remaining tread depth when deciding whether to continue using them.

Tires on a 2018 Tesla should be checked before every drive and inspected more thoroughly before any longer outing. Look for cracking, cuts, bulges, punctures, unusual shoulder wear, and signs that the tire is not holding pressure consistently. Since these are tubeless radial applications, pay close attention to the valve stems, wheel sealing surfaces, and any prior repair areas as well as the tire itself.

Frequent inspection is especially worthwhile on a modern EV because quiet operation can make some tire issues less obvious until they become more serious. A short walkaround with a pressure check can catch damage that would otherwise compromise range, ride quality, or safety. Before a road trip, include the spare or mobility kit in the inspection plan so the car is not stranded by a problem that could have been caught at home.

Yes, the covered 2018 Tesla tires are modern radial highway tires, and the available speed ratings are W and Y where specified. W is rated to 168 mph, and Y is rated to 186 mph, which is well above normal U.S. highway speeds. For everyday road use, the more important real-world factors are proper inflation, load capacity, tread condition, and whether the tire matches the car’s actual wheel diameter and model-specific fitment.

A 2018 Tesla can place substantial demands on tires because of vehicle weight and immediate electric torque, so condition matters just as much as the headline speed symbol. A tire with an appropriate rating is only safe when it is in good shape and correctly fitted to the wheel. If the car will see sustained interstate use, verify the sidewall markings, pressure, and age before the trip rather than relying on size alone.

Inflation pressure on a 2018 Tesla should follow the vehicle placard or owner’s manual first, because factory pressure targets are tied to the vehicle’s weight distribution, suspension tuning, and original wheel package. Tire pressure figures such as 50 psi in the load statements for some 235/40R19, 235/45R18, 235/35R20, and 245/45R19 products represent maximum load-pressure references for those tires, not a blanket running pressure for every 2018 Tesla application.

The important distinction is that a tire’s maximum pressure marking and the car’s recommended operating pressure serve different purposes. Use the Tesla-recommended setting for routine driving unless a tire manufacturer or vehicle specialist directs otherwise for a specific use case. If you change wheel or tire packages, confirm that the replacement size is appropriate for the car and then set pressures according to the vehicle guidance for that fitment category.

Before taking a 2018 Tesla on a longer drive, inspect each tire for sidewall cracking, cuts, bulges, punctures, irregular tread wear, and correct cold inflation pressure. Check the valve stems, make sure the tread is not worn unevenly across the shoulders or center, and confirm that the tires on the car match the proper size for the wheel package. It is also smart to inspect the spare solution, whether that means a spare wheel setup or the vehicle’s emergency mobility equipment.

Tires are only one part of trip preparation, but they are one of the easiest areas to evaluate before a problem develops on the road. A longer drive also justifies a quick check of alignment symptoms, brake feel, and suspension behavior, since uneven wear often points to a larger issue. On a 2018 Tesla, a calm and quiet cabin can mask early warning signs, so a deliberate inspection is better than waiting for noise or vibration to announce trouble.