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Cooper Tires
Cooper Tires COO Zeon RS3-G1 225/40R18XL
Cooper Tires COO Zeon RS3-G1 225/40R18XL
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The Cooper Tires Zeon RS3-G1 in 225/40R18 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 225/40R18 means
In the size 225/40R18, 225 is the section width in millimeters (8.86 in), 40 is the aspect ratio — the sidewall stands 40% as tall as the tire is wide, or 90.0 mm (3.54 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 25.09 inches, turning roughly 804 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 92 — a maximum load of 1,389 lbs per tire. The speed symbol Y corresponds to a maximum sustained speed of 186 mph.
Specifications
| Size | 225/40R18XL |
| Tire Type | High Performance |
| Service Description | 92Y |
| Load Index | 92 |
| Speed Rating | Y |
| Load Range | XL |
| Section Width (mm) | 225 |
| Aspect Ratio | 40 |
| Overall Diameter (in) | 25.12 |
| Tread Depth (/32") | 10.5 |
| Treadwear | 500 |
| Traction Grade | AA |
| Temperature Grade | A |
| UTQG | 500AAA |
| Warranty | 45K |
Frequently asked questions
What does 92Y mean on the Cooper Tires Zeon RS3-G1?
92Y breaks down as load index 92 — rated for 1,389 lbs per tire — with a Y speed rating, good for a maximum sustained 186 mph.
What kind of tire is the Cooper Tires Zeon RS3-G1?
The Cooper Tires Zeon RS3-G1 in 225/40R18 is a high performance tire.
What are the treadwear and warranty ratings on the Cooper Tires Zeon RS3-G1?
This tire carries a treadwear grade of 500, traction grade AA, temperature grade A under UTQG. The manufacturer's warranty is 45K.
Keep shopping
Shop all 225/40R18 tires, see every Cooper Tires Zeon RS3-G1 size, or view all tires at ThreePiece.us.
- BRAND:
- Cooper Tires
- Model:
- COO Zeon RS3-G1
- Size:
- 225/40R18XL
- Aspect Ratio:
- 40
- Load Index:
- 92
- Load Range:
- XL
- Section Width:
- 225
- Service Description:
- 92Y
- Speed Index:
- Y
- Temperature:
- A
- Tire Rim Diameter:
- 25.12
- Tire Type:
- High Performance
- Traction:
- AA
- Tread Wear:
- 500
- Tread Depth:
- 10.5
- UQTG:
- 500AAA
- Warranty:
- 45K
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