Lowest price
Continental Xl
255/40R21
Load102 · 1,874 lbsSpeedY · 186 mph
SummerPassenger
Price
$481.23
at Tire Agent4.8(19,237)
Excl. install
Price
$481.23
at Tire Agent
255/40R21Tires
2 prices · 2 brands · 1 retailers · Updated 1 month ago
Cheapest Price
$481.23
at Tire Agent (excl. installation)
Prices updated: July 15, 2026
2 of 2 offers for 255/40R21
Price comparison: 255/40R21
Showing 2 of 2 tires
Pirelli Xl
255/40R21
Load102 · 1,874 lbsSpeedY · 186 mph
SummerPassenger
Price
$486.62
at Tire Agent4.8(19,237)
Excl. install
Price
$486.62
at Tire Agent
Prices per tire · Sales tax may apply · Updated 1 month ago · Submit a price correction
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What Does 255/40R21 Mean?
255
Width
millimetres
40
Profile
% of width
21
Rim
inches
A 255mm wide tire with a sidewall height equal to 40% of the width (102.0mm), fitting a 21-inch rim, a common passenger tire size in the US market.
FAQ: 255/40R21 Tires
Where can I buy 255/40R21 tires online in the USA?+
The cheapest 255/40R21 tires we track start at $481.23 from Tire Agent. Tire Rack, SimpleTire, Priority Tire, and other national retailers ship nationwide; use the table above to compare.
How much does a 255/40R21 tire cost in the USA?+
255/40R21 tires typically range from about $481.23 for value brands up to $1,058.71 or more for premium performance tires. Installation is usually $15–$25 per tire extra.
Is 255/40R21 the right tire for my car?+
Check your door-jamb sticker or owner's manual. Many vehicles that use 255/40R21 also have approved alternative sizes; see our vehicle fitment pages for common models.
How much does tire installation cost for 255/40R21?+
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 255/40R21 the same as 255/40R21?+
Yes, same size. Both describe a 255mm wide tire with a 40% sidewall on a 21-inch rim.
Related Tire Sizes
Looking for a specific brand? Continental, Pirelli. City hubs: Houston, Los Angeles, Chicago, New York. Seasons: all-season, winter.