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DUNLOP
Dunlop SP Sport Maxx 050 245/45R20 99Y - 57000360
Dunlop SP Sport Maxx 050 245/45R20 99Y - 57000360
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The Dunlop SP Sport Maxx 050 in 245/45R20 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 245/45R20 means
In the size 245/45R20, 245 is the section width in millimeters (9.65 in), 45 is the aspect ratio — the sidewall stands 45% as tall as the tire is wide, or 110.2 mm (4.34 in) — R denotes radial construction, and 20 is the wheel diameter in inches. That works out to an overall diameter of about 28.68 inches, turning roughly 703 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 99 — a maximum load of 1,709 lbs per tire. The speed symbol Y corresponds to a maximum sustained speed of 186 mph.
Specifications
| Size | 245/45R20 |
| Tire Type | Summer |
| Service Description | 99Y |
| Load Index | 99 |
| Speed Rating | Y |
| Load Range | SL |
| Section Width (mm) | 245 |
| Aspect Ratio | 45 |
| Overall Diameter (in) | 28.6 |
| Tread Depth (/32") | 9 |
| Treadwear | 280 |
| Traction Grade | A |
| Temperature Grade | A |
| UTQG | 280AA |
Frequently asked questions
What does 99Y mean on the Dunlop SP Sport Maxx 050?
99Y breaks down as load index 99 — rated for 1,709 lbs per tire — with a Y speed rating, good for a maximum sustained 186 mph.
What kind of tire is the Dunlop SP Sport Maxx 050?
The Dunlop SP Sport Maxx 050 in 245/45R20 is a summer tire.
What are the treadwear and warranty ratings on the Dunlop SP Sport Maxx 050?
This tire carries a treadwear grade of 280, traction grade A, temperature grade A under UTQG.
Keep shopping
Shop all 245/45R20 tires, browse Dunlop tires, see every Dunlop SP Sport Maxx 050 size, or view all tires at ThreePiece.us.
- BRAND:
- Dunlop
- Model:
- SP Sport Maxx 050
- Size:
- 245/45R20
- Aspect Ratio:
- 45
- Load Index:
- 99
- Load Range:
- SL
- Section Width:
- 245
- Service Description:
- 99Y
- Speed Index:
- Y
- Temperature:
- A
- Tire Rim Diameter:
- 28.6
- Tire Type:
- Summer
- Traction:
- A
- Tread Wear:
- 280
- Tread Depth:
- 9
- UQTG:
- 280AA
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