Lowest price
Gripmax Suregrip Pro Sport
315/30R21
SummerPassenger
Price
$170.96
at SimpleTire4.6(8,900)
Excl. install
Price
$170.96
at SimpleTire
315/30R21Tires
13 prices · 7 brands · 1 retailers · Updated 1 month ago
Cheapest Price
$170.96
at SimpleTire (excl. installation)
Prices updated: July 6, 2026
13 of 13 offers for 315/30R21
Price comparison: 315/30R21
Showing 8 of 13 tires
Price
$174.96
at SimpleTire4.6(8,900)
Excl. install
Price
$174.96
at SimpleTire
American Roadstar Sport As
315/30R21
All-seasonPassenger
Price
$178.96
at SimpleTire4.6(8,900)
Excl. install
Price
$178.96
at SimpleTire
Price
$189.96
at SimpleTire4.6(8,900)
Excl. install
Price
$189.96
at SimpleTire
Continental Contisportcontact 5p
315/30R21
SummerPassenger
Price
$480.96
at SimpleTire4.6(8,900)
Excl. install
Price
$480.96
at SimpleTire
Price
$528
at SimpleTire4.6(8,900)
Excl. install
Price
$528
at SimpleTire
Goodyear Eagle F1 Supersport
315/30R21
All-seasonPassenger
Price
$632.96
at SimpleTire4.6(8,900)
Excl. install
Price
$632.96
at SimpleTire
Goodyear Eagle F1 Supersport R
315/30R21
All-seasonPassenger
Price
$634.99
at SimpleTire4.6(8,900)
Excl. install
Price
$634.99
at SimpleTire
Prices per tire · Sales tax may apply · Updated 1 month ago · Submit a price correction
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What Does 315/30R21 Mean?
315
Width
millimetres
30
Profile
% of width
21
Rim
inches
A 315mm wide tire with a sidewall height equal to 30% of the width (94.5mm), fitting a 21-inch rim, a common passenger tire size in the US market.
FAQ: 315/30R21 Tires
Where can I buy 315/30R21 tires online in the USA?+
The cheapest 315/30R21 tires we track start at $170.96 from SimpleTire. Tire Rack, SimpleTire, Priority Tire, and other national retailers ship nationwide; use the table above to compare.
How much does a 315/30R21 tire cost in the USA?+
315/30R21 tires typically range from about $170.96 for value brands up to $376.11 or more for premium performance tires. Installation is usually $15–$25 per tire extra.
Is 315/30R21 the right tire for my car?+
Check your door-jamb sticker or owner's manual. Many vehicles that use 315/30R21 also have approved alternative sizes; see our vehicle fitment pages for common models.
How much does tire installation cost for 315/30R21?+
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 315/30R21 the same as 315/30R21?+
Yes, same size. Both describe a 315mm wide tire with a 30% sidewall on a 21-inch rim.
Related Tire Sizes
Looking for a specific brand? Gripmax, Arroyo, American Roadstar, Accelera. City hubs: Houston, Los Angeles, Chicago, New York. Seasons: all-season, winter.