245/40R18 tires
Prices, best picks and current deals for 245/40R18, a performance cars size fitted to Subaru WRX STI, Subaru WRX, Audi A4 and more.
What 245/40R18 tires cost
Kumho Ecsta PA51
Lowest price that still brakes and wears acceptably. Fine for a second car or low annual mileage.
Firestone Firehawk Indy 500
The value sweet spot: long mileage warranty, solid wet grip, sane price.
Michelin Pilot Sport 4S
Best wet and snow braking, quietest ride, longest tread life. Worth it if you keep the car.
Prices are per tire, before mounting and balancing, based on what the big US online retailers charge for this size. A set of four in the mid range comes to roughly $544 to $768, and a brand rebate can take another $50 to $110 off, see this month's deals.
About the 245/40R18 size
Classic sport-sedan size, W/Y summer and V/W all-season. Michelin Pilot Sport 4S and Continental DWS06 Plus are the volume sellers.
The numbers mean: 245 mm section width, sidewall height 40 % of that width, and a 18-inch rim. Overall diameter works out to about 25.7 inches. Any replacement has to match all three, and the load index and speed rating on your door sticker must be met or exceeded. Our guide on reading a tire size walks through it.
Vehicles that use 245/40R18
- Subaru WRX STI (2015-2021)
- Subaru WRX (2022-2024, Limited/GT)
- Audi A4 (2009-2016, Prestige)
- Audi A4 (2017-2024, Premium Plus)
- Audi A5 (2018-2024)
- Hyundai Sonata (2015-2019, Sport 2.0T)
- Mercedes-Benz C-Class (2015-2021, AMG Line rear)
Confirm on the door-jamb sticker before ordering. Optional wheel packages often change the size within the same model.
Which type of 245/40R18 tire?
Summer Tires
Sports-car and performance-sedan owners, and anyone in a warm climate who wants the best possible grip and steering.
Performance Tires
Owners of sports sedans, hot hatches and performance crossovers who want year-round tires with real handling.
Run-Flat Tires
Owners of cars that came without a spare, and drivers who value never being stranded by a flat.
Frequently asked questions
How much do 245/40R18 tires cost?
Expect $95–$132 per tire for a budget brand, $136–$192 for a mid-range tire like the Firestone Firehawk Indy 500, and $196–$285 for a premium tire like the Michelin Pilot Sport 4S. Add roughly $15 to $45 per tire for mounting and balancing.
What vehicles use 245/40R18 tires?
245/40R18 is original equipment on Subaru WRX STI (2015-2021), Subaru WRX (2022-2024, Limited/GT), Audi A4 (2009-2016, Prestige), Audi A4 (2017-2024, Premium Plus), Audi A5 (2018-2024), Hyundai Sonata (2015-2019, Sport 2.0T), Mercedes-Benz C-Class (2015-2021, AMG Line rear), among others. Always confirm with the sticker inside your driver's door, because trim levels and wheel packages can change the size.
What is the best 245/40R18 tire?
For most drivers our mid-range pick, the Firestone Firehawk Indy 500, is the sweet spot of price and tread life. If you keep the vehicle a long time or drive in heavy rain and snow, the Michelin Pilot Sport 4S is worth the extra. On a tight budget the Kumho Ecsta PA51 is a sound choice.
Can I replace just one or two 245/40R18 tires?
On a front- or rear-wheel-drive car, yes: replace in pairs on the same axle and put the newer pair on the rear. On all-wheel-drive vehicles most makers want all four replaced together, or a new tire shaved to match, because a difference in circumference strains the drivetrain.