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Winrun
Winrun R330 255/40ZR21
Winrun R330 255/40ZR21
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Winrun
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/week
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Width:
21.00
(in)
Height:
10.04
(in)
Depth:
21.00
(in)
SKU:
Winrunw330301
$267.00
Lease-to-own for as low as
/week
Get Started
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Shop the Winrun R330 255/40R21 at ThreePiece.us — free shipping on every order, Affirm financing available, and fast delivery nationwide.
What 255/40R21 means
In the size 255/40R21, 255 is the section width in millimeters (10.04 in), 40 is the aspect ratio — the sidewall stands 40% as tall as the tire is wide, or 102.0 mm (4.02 in) — R denotes radial construction, and 21 is the wheel diameter in inches. That works out to an overall diameter of about 29.03 inches, turning roughly 695 revolutions per mile. Overall diameter is what matters for speedometer accuracy and clearance when you change sizes, so compare it — not just the width — against your current tire.
The service description on this tire decodes to a load index of 102 — a maximum load of 1,874 lbs per tire. The speed symbol W corresponds to a maximum sustained speed of 168 mph.
Specifications
| Size | 255/40ZR21 |
| Service Description | 102W |
| Load Index | 102 |
| Speed Rating | W |
| Load Range | XL |
| Section Width (mm) | 255 |
| Aspect Ratio | 40Z |
| Temperature Grade | ATIRE RIM DIAMETER=21TIRE TYPE=ULTRA HIGH PERFORMANCETRACTION=ATREAD WEAR=420TREAD DEPTH=UQTG=420 A AWARRANTY= |
Frequently asked questions
How fast does this tire ship?
Every order at ThreePiece.us ships free, with fast delivery from a nationwide warehouse network. Affirm financing is available at checkout.
What does 102W mean on the Winrun R330?
102W breaks down as load index 102 — rated for 1,874 lbs per tire — with a W speed rating, good for a maximum sustained 168 mph.
Will 255/40R21 tires fit my vehicle?
Check the size molded into your current tire's sidewall or the tire placard inside the driver's door jamb — if it reads 255/40R21, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right. See every 255/40R21 tire in stock to compare options.
Keep shopping
Shop all 255/40R21 tires, browse Winrun tires, see every Winrun R330 size, or view all tires at ThreePiece.us.
- BRAND:
- Winrun
- MODEL:
- R330
- SIZE:
- 255/40ZR21
- ASPECT RATIO:
- 40Z
- LOAD INDEX:
- 102
- LOAD RANGE:
- XL
- SECTION WIDTH:
- 255
- SERVICE DESCRIPTION:
- 102W
- SPEED INDEX:
- W
- TEMPERATURE:
- ATIRE RIM DIAMETER=21TIRE TYPE=ULTRA HIGH PERFORMANCETRACTION=ATREAD WEAR=420TREAD DEPTH=UQTG=420 A AWARRANTY=
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