2018 Hyundai Santa Fe Tire Size by Trim
Knowing the correct tire size for a 2018 Hyundai Santa Fe matters for safety, ride comfort, and warranty compliance. The 2018 Santa Fe lineup spans several trims, and Hyundai equipped most of them with 245/65R17 all-season tires as the standard setup. The higher trims — Limited and Ultimate — moved to 245/60R18, which lowers the sidewall for a slightly sportier look and improved handling feel. The Santa Fe Hybrid, introduced alongside the standard model, uses the same 245/65R17 size as the base SE and SEL versions. These are the original equipment sizes confirmed by Hyundai for the 2018 model year, and sticking with them preserves the factory-calibrated electronic stability control and traction systems.
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Why OEM Tire Size Matters
Hyundai engineers the Santa Fe's braking, steering, and electronic stability systems around the stock tire dimensions. A mismatched size can skew speedometer readings, trigger the check-engine light through ABS and traction-control faults, and reduce fuel economy. The load index and speed rating on the original tire also meet the vehicle's gross vehicle weight rating and maximum speed capability, so replacing tires with a lower rating can compromise performance under heavy loads or highway driving.
2018 Santa Fe Tire Size Chart
| Trim Level | Tire Size | Rim Diameter | Notes |
|---|---|---|---|
| SE | 245/65R17 | 17 inches | Standard all-season; compact spare |
| SEL | 245/65R17 | 17 inches | Same as SE; larger standard wheels on some packages |
| Limited | 245/60R18 | 18 inches | Low-profile sidewall; upgraded alloy wheels |
| Ultimate | 245/60R18 | 18 inches | Premium package; same size as Limited |
| Hybrid | 245/65R17 | 17 inches | Matches base size; electric motor does not affect tire spec |
Load Index and Speed Rating
Most 2018 Santa Fe tires carry a load index of 104, which supports up to 1,984 pounds per tire, paired with a speed rating of S (112 mph) or T (118 mph). The exact rating printed on the sidewall can vary depending on the tire brand Hyundai selected for that model year. When shopping for replacements, matching the load index and speed rating — or exceeding them — keeps the vehicle within its engineered safety envelope.
Spare Tire Specifications
The 2018 Santa Fe comes with a compact spare tire, typically a 125/70R17 or equivalent, mounted on a steel wheel. This temporary spare is rated for a lower speed — usually 50 mph — and should be replaced with a full-size tire as soon as possible. The compact spare takes up less cargo space than a full-size donut, but it is not a long-term solution, and driving on it for extended distances can damage the drivetrain.
Tire Pressure and Maintenance
Hyundai recommends 32 to 35 psi for the 2018 Santa Fe's standard 245/65R17 tires, while the 245/60R18 setup on Limited and Ultimate trims runs slightly higher, often around 33 to 35 psi. The precise pressure target for each corner is printed on a sticker inside the driver's door jamb. Checking tire pressure monthly and before long trips helps maintain even tread wear and keeps the electronic stability systems functioning as designed.
Aftermarket Tire Considerations
If you want to upgrade the wheels on a 2018 Santa Fe, the safest approach is to stay within the OEM diameter — 17 or 18 inches — and keep the overall tire circumference within a 3 percent deviation from stock. Going to 20-inch rims shrinks the sidewall dramatically, which can cause pothole damage, a harsher ride, and potential rubbing on the fender wells. Winter tires in the correct size improve cold-weather traction without requiring a lift kit or fender modification.
Where to Find the Correct Size
The 2018 Santa Fe tire size is listed in the owner's manual on the door-jamb sticker, and on the tire information placard. When ordering replacement tires, using the trim-specific size above ensures the tires fit the wheel wells, clear the suspension components, and maintain the calibrated ground clearance. Tire retailers and Hyundai dealerships can confirm the size if the trim badge has been removed or the paperwork is unavailable.