255/40R18 tires
Prices, best picks and current deals for 255/40R18, a performance cars size fitted to Genesis G70, BMW 3 Series and more.
What 255/40R18 tires cost
Falken Azenis FK520
Lowest price that still brakes and wears acceptably. Fine for a second car or low annual mileage.
Continental ExtremeContact DWS 06 Plus
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 $620 to $800, and a brand rebate can take another $50 to $110 off, see this month's deals.
About the 255/40R18 size
Rear half of a staggered 18 in sport-sedan setup (fronts are 225/45R18). Y-rated, and you cannot rotate front to rear.
The numbers mean: 255 mm section width, sidewall height 40 % of that width, and a 18-inch rim. Overall diameter works out to about 26 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 255/40R18
- Genesis G70 (2019-2024, 2.0T rear)
- BMW 3 Series (2019-2024, Sport Line 18 in rear)
Confirm on the door-jamb sticker before ordering. Optional wheel packages often change the size within the same model.
Which type of 255/40R18 tire?
All-Season Tires
Drivers in the South, West Coast and mild parts of the Midwest who want one set of tires that lasts a long time and is quiet.
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.
Frequently asked questions
How much do 255/40R18 tires cost?
Expect $115–$150 per tire for a budget brand, $155–$200 for a mid-range tire like the Continental ExtremeContact DWS 06 Plus, and $210–$290 for a premium tire like the Michelin Pilot Sport 4S. Add roughly $15 to $45 per tire for mounting and balancing.
What vehicles use 255/40R18 tires?
255/40R18 is original equipment on Genesis G70 (2019-2024, 2.0T rear), BMW 3 Series (2019-2024, Sport Line 18 in 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 255/40R18 tire?
For most drivers our mid-range pick, the Continental ExtremeContact DWS 06 Plus, 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 Falken Azenis FK520 is a sound choice.
Can I replace just one or two 255/40R18 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.