Lowest price
Atlas Force Uhp
315/40R21
Load115 · 2,679 lbsSpeedY · 186 mph
All-seasonPassenger
Price
$164.99
at SimpleTire4.6(8,900)
Excl. install
Price
$164.99
at SimpleTire
315/40R21Tires
26 prices · 18 brands · 1 retailers · Updated 1 month ago
Cheapest Price
$164.99
at SimpleTire (excl. installation)
Prices updated: July 6, 2026
26 of 26 offers for 315/40R21
Price comparison: 315/40R21
Showing 8 of 26 tires
Summit Trail Climber Suv2
315/40R21
Load115 · 2,679 lbsSpeedW · 168 mph
All-seasonPassenger
Price
$166.96
at SimpleTire4.6(8,900)
Excl. install
Price
$166.96
at SimpleTire
Price
$167.96
at SimpleTire4.6(8,900)
Excl. install
Price
$167.96
at SimpleTire
Lionhart Lh Five
315/40R21
Load111 · 2,403 lbsSpeedY · 186 mph
All-seasonPassenger
Price
$172.96
at SimpleTire4.6(8,900)
Excl. install
Price
$172.96
at SimpleTire
Ironhead Reflex Suv Uvd01
315/40R21
Load115 · 2,679 lbsSpeedW · 168 mph
All-seasonPassenger
Price
$175.96
at SimpleTire4.6(8,900)
Excl. install
Price
$175.96
at SimpleTire
Blackhawk Agility Suv
315/40R21
Load115 · 2,679 lbsSpeedW · 168 mph
All-seasonPassenger
Price
$180.96
at SimpleTire4.6(8,900)
Excl. install
Price
$180.96
at SimpleTire
Price
$181.96
at SimpleTire4.6(8,900)
Excl. install
Price
$181.96
at SimpleTire
Price
$191.96
at SimpleTire4.6(8,900)
Excl. install
Price
$191.96
at SimpleTire
Prices per tire · Sales tax may apply · Updated 1 month ago · Submit a price correction
Want installation quotes for 315/40R21?
Leave your details and tire shops reply with their best out-the-door price. Free, no obligation.
Change size
What Does 315/40R21 Mean?
315
Width
millimetres
40
Profile
% of width
21
Rim
inches
A 315mm wide tire with a sidewall height equal to 40% of the width (126.0mm), fitting a 21-inch rim, a common passenger tire size in the US market.
FAQ: 315/40R21 Tires
Where can I buy 315/40R21 tires online in the USA?+
The cheapest 315/40R21 tires we track start at $164.99 from SimpleTire. Tire Rack, SimpleTire, Priority Tire, and other national retailers ship nationwide; use the table above to compare.
How much does a 315/40R21 tire cost in the USA?+
315/40R21 tires typically range from about $164.99 for value brands up to $362.98 or more for premium performance tires. Installation is usually $15–$25 per tire extra.
Is 315/40R21 the right tire for my car?+
Check your door-jamb sticker or owner's manual. Many vehicles that use 315/40R21 also have approved alternative sizes; see our vehicle fitment pages for common models.
How much does tire installation cost for 315/40R21?+
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 315/40R21 the same as 315/40R21?+
Yes, same size. Both describe a 315mm wide tire with a 40% sidewall on a 21-inch rim.
Related Tire Sizes
Looking for a specific brand? Atlas, Summit, Lexani, Lionhart. City hubs: Houston, Los Angeles, Chicago, New York. Seasons: all-season, winter.