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Michelin
Michelin Pilot Sport A/S 4 285/30ZR20 95(Y) - 66790
Michelin Pilot Sport A/S 4 285/30ZR20 95(Y) - 66790
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The Michelin Pilot Sport A/S 4 in 285/30R20 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 285/30R20 means
In the size 285/30R20, 285 is the section width in millimeters (11.22 in), 30 is the aspect ratio — the sidewall stands 30% as tall as the tire is wide, or 85.5 mm (3.37 in) — R denotes radial construction, and 20 is the wheel diameter in inches. That works out to an overall diameter of about 26.73 inches, turning roughly 754 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 95 — a maximum load of 1,521 lbs per tire. The speed symbol Y corresponds to a maximum sustained speed of 186 mph.
Specifications
| Size | 285/30ZR20 |
| Tire Type | All Season |
| Service Description | 95Y |
| Load Index | 95 |
| Speed Rating | Y |
| Load Range | Standard Load |
| Section Width (mm) | 285 |
| Aspect Ratio | 30 |
| Overall Diameter (in) | 26.8 |
| Tread Depth (/32") | 10 |
| Treadwear | 540 |
| Traction Grade | AA |
| Temperature Grade | A |
| UTQG | 540AAA |
| Warranty | 30K |
Frequently asked questions
What does 95Y mean on the Michelin Pilot Sport A/S 4?
95Y breaks down as load index 95 — rated for 1,521 lbs per tire — with a Y speed rating, good for a maximum sustained 186 mph.
What kind of tire is the Michelin Pilot Sport A/S 4?
The Michelin Pilot Sport A/S 4 in 285/30R20 is a all season tire.
What are the treadwear and warranty ratings on the Michelin Pilot Sport A/S 4?
This tire carries a treadwear grade of 540, traction grade AA, temperature grade A under UTQG. The manufacturer's warranty is 30K.
Keep shopping
Browse Michelin tires, see every Michelin Pilot Sport A/S 4 size, or view all tires at ThreePiece.us.
- BRAND:
- Michelin
- Model:
- Pilot Sport A/S 4
- Size:
- 285/30ZR20
- Aspect Ratio:
- 30
- Load Index:
- 95
- Load Range:
- Standard Load
- Section Width:
- 285
- Service Description:
- 95Y
- Speed Index:
- Y
- Temperature:
- A
- Tire Rim Diameter:
- 26.8
- Tire Type:
- All Season
- Traction:
- AA
- Tread Wear:
- 540
- Tread Depth:
- 10
- UQTG:
- 540AAA
- Warranty:
- 30K
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