Lowest price
Gladiator X Comp H P
345/30R21
All-seasonPassenger
Price
$347.96
at SimpleTire4.6(8,900)
Excl. install
Price
$347.96
at SimpleTire
345/30R21Tires
1 prices · 1 brands · 1 retailers · Updated 1 hour ago
Cheapest Price
$347.96
at SimpleTire (excl. installation)
Prices updated: July 6, 2026
1 of 1 offers for 345/30R21
Price comparison — 345/30R21
Showing 1 of 1 tiresPrices per tire · Sales tax may apply · Updated 1 hour ago · Submit a price correction
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What Does 345/30R21 Mean?
345
Width
millimetres
30
Profile
% of width
21
Rim
inches
A 345mm wide tire with a sidewall height equal to 30% of the width (103.5mm), fitting a 21-inch rim — a common passenger tire size in the US market.
FAQ — 345/30R21 Tires
Where can I buy 345/30R21 tires online in the USA?+
The cheapest 345/30R21 tires we track start at $347.96 from SimpleTire. Tire Rack, SimpleTire, Priority Tire, and other national retailers ship nationwide — use the table above to compare.
How much does a 345/30R21 tire cost in the USA?+
345/30R21 tires typically range from about $347.96 for value brands up to $765.51 or more for premium performance tires. Installation is usually $15–$25 per tire extra.
Is 345/30R21 the right tire for my car?+
Check your door-jamb sticker or owner's manual. Many vehicles that use 345/30R21 also have approved alternative sizes — see our vehicle fitment pages for common models.
How much does tire installation cost for 345/30R21?+
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 345/30R21 the same as 345/30R21?+
Yes — same size. Both describe a 345mm wide tire with a 30% sidewall on a 21-inch rim.
Related Tire Sizes
Looking for a specific brand? Gladiator. City hubs: Houston, Los Angeles, Chicago, New York. Seasons: all-season, winter.