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.
Yes, this fits your Genesis G70. 255/40R18 is the original size on the rear axle on the 2019-2024 Genesis G70.
The sticker inside the driver's door is still the final word, because trim and wheel package can change the size. Back to every Genesis G70 size.
What 255/40R18 tires cost
Lexani LX-Twenty
Lowest price that still brakes and wears acceptably. Fine for a second car or low annual mileage.
Listed as Lexani LX-Twenty 255/40R18 99W Performance Passenger Tires
Yokohama Advan
The value sweet spot: long mileage warranty, solid wet grip, sane price.
Listed as Yokohama Advan Sport V107 255/40ZR18 99(Y) UHP Passenger Tires
Bridgestone Potenza
The strongest wet and snow braking and the longest tread life among what is stocked in this size. Worth it if you keep the car.
Listed as Bridgestone Potenza RE980AS 255/40R18 99W UHP Passenger Tires
Prices are per tire, before mounting and balancing. A set of four in the mid range comes to roughly $464 to $900, and a brand rebate can take another $50 to $110 off, see this month's deals.
Cheapest 255/40R18 right now
Rockblade Staminarace 255/40ZR18 99W UHP Passenger Tires
$86.99per tire $347.96 for a set of four
75 tires in this size, priced straight from SimpleTire's own product feed, read 29 September 2026. Stock and prices move daily, so check the shop for today's figure.
See every 255/40R18 tire in stock at SimpleTire
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 $87–$116 per tire for a budget brand, $116–$225 for a mid-range tire like the Yokohama Advan, and $225–$342 for a premium tire like the Bridgestone Potenza. A set of four therefore starts at about $348. 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) and 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 Yokohama Advan, 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 Bridgestone Potenza is worth the extra. On a tight budget the Lexani LX-Twenty 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.