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Toyo
Toyo TOY Celsius Sport 255/40R21XL
Toyo TOY Celsius Sport 255/40R21XL
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Shop the Toyo Celsius Sport 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 manufacturer lists the overall diameter of this specific tire as 21 inches — when clearance is tight, go by the published figure rather than the nominal size math.
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 Y corresponds to a maximum sustained speed of 186 mph.
Specifications
| Size | 255/40R21xL |
| Tire Type | High Performance |
| Service Description | 102Y |
| Load Index | 102 |
| Speed Rating | Y |
| Load Range | XL |
| Section Width (mm) | 255 |
| Aspect Ratio | 40 |
| Overall Diameter (in) | 21 |
| Tread Depth (/32") | 9.6 |
| Treadwear | 380 |
| Traction Grade | A |
| Temperature Grade | A |
| UTQG | 380AA |
| Warranty | 40K |
Frequently asked questions
What are the treadwear and warranty ratings on the Toyo Celsius Sport?
This tire carries a treadwear grade of 380, traction grade A, temperature grade A under UTQG. The manufacturer's warranty is 40K.
What does 102Y mean on the Toyo Celsius Sport?
102Y breaks down as load index 102 — rated for 1,874 lbs per tire — with a Y speed rating, good for a maximum sustained 186 mph.
What kind of tire is the Toyo Celsius Sport?
The Toyo Celsius Sport in 255/40R21 is a high performance tire.
Keep shopping
Shop all 255/40R21 tires, see every Toyo Celsius Sport size, or view all tires at ThreePiece.us.
- BRAND:
- Toyo
- Model:
- TOY Celsius Sport
- Size:
- 255/40R21xL
- Aspect Ratio:
- 40
- Load Index:
- 102
- Load Range:
- XL
- Section Width:
- 255
- Service Description:
- 102Y
- Speed Index:
- Y
- Temperature:
- A
- Tire Rim Diameter:
- 21
- Tire Type:
- High Performance
- Traction:
- A
- Tread Wear:
- 380
- Tread Depth:
- 9.6
- UQTG:
- 380AA
- Warranty:
- 40K
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