Lowest price
Nitto Nt555 G2
315/40R18
All-seasonPassenger
Price
$339
at SimpleTire4.6(8,900)
Excl. install
Price
$339
at SimpleTire
315/40R18Tires
3 prices · 2 brands · 1 retailers · Updated 1 month ago
Cheapest Price
$339
at SimpleTire (excl. installation)
Prices updated: July 6, 2026
3 of 3 offers for 315/40R18
Price comparison: 315/40R18
Showing 3 of 3 tires
Atturo Az850 Dr
315/40R18
Load108 · 2,205 lbsSpeedY · 186 mph
All-seasonPassenger
Price
$399
at SimpleTire4.6(8,900)
Excl. install
Price
$399
at SimpleTire
Price
$508
at SimpleTire4.6(8,900)
Excl. install
Price
$508
at SimpleTire
Prices per tire · Sales tax may apply · Updated 1 month ago · Submit a price correction
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What Does 315/40R18 Mean?
315
Width
millimetres
40
Profile
% of width
18
Rim
inches
A 315mm wide tire with a sidewall height equal to 40% of the width (126.0mm), fitting a 18-inch rim, a common passenger tire size in the US market.
FAQ: 315/40R18 Tires
Where can I buy 315/40R18 tires online in the USA?+
The cheapest 315/40R18 tires we track start at $339 from SimpleTire. Tire Rack, SimpleTire, Priority Tire, and other national retailers ship nationwide; use the table above to compare.
How much does a 315/40R18 tire cost in the USA?+
315/40R18 tires typically range from about $339 for value brands up to $745.80 or more for premium performance tires. Installation is usually $15–$25 per tire extra.
Is 315/40R18 the right tire for my car?+
Check your door-jamb sticker or owner's manual. Many vehicles that use 315/40R18 also have approved alternative sizes; see our vehicle fitment pages for common models.
How much does tire installation cost for 315/40R18?+
Most US tire shops charge $15–$25 per tire for mount and balance. Wheel alignment is often $75–$150 extra. Retailers like Tire Rack let you ship to a local installer at checkout.
Is 315/40R18 the same as 315/40R18?+
Yes, same size. Both describe a 315mm wide tire with a 40% sidewall on a 18-inch rim.
Related Tire Sizes
Looking for a specific brand? Nitto, Atturo. City hubs: Houston, Los Angeles, Chicago, New York. Seasons: all-season, winter.