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Cooper Tires
Cooper Tires COO CS5 Ultra Touring 225/55R18
Cooper Tires COO CS5 Ultra Touring 225/55R18
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The Cooper Tires CS5 Ultra Touring in 225/55R18 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 225/55R18 means
In the size 225/55R18, 225 is the section width in millimeters (8.86 in), 55 is the aspect ratio — the sidewall stands 55% as tall as the tire is wide, or 123.8 mm (4.87 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 27.74 inches, turning roughly 727 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 98 — a maximum load of 1,653 lbs per tire. The speed symbol H corresponds to a maximum sustained speed of 130 mph.
Specifications
| Size | 225/55R18 |
| Tire Type | Touring |
| Service Description | 98H |
| Load Index | 98 |
| Speed Rating | H |
| Load Range | SL |
| Section Width (mm) | 225 |
| Aspect Ratio | 55 |
| Overall Diameter (in) | 27.76 |
| Tread Depth (/32") | 11 |
| Treadwear | 640 |
| Traction Grade | A |
| Temperature Grade | A |
| UTQG | 640AA |
| Warranty | 70K |
Frequently asked questions
What does 98H mean on the Cooper Tires CS5 Ultra Touring?
98H breaks down as load index 98 — rated for 1,653 lbs per tire — with an H speed rating, good for a maximum sustained 130 mph.
What kind of tire is the Cooper Tires CS5 Ultra Touring?
The Cooper Tires CS5 Ultra Touring in 225/55R18 is a touring tire.
What are the treadwear and warranty ratings on the Cooper Tires CS5 Ultra Touring?
This tire carries a treadwear grade of 640, traction grade A, temperature grade A under UTQG. The manufacturer's warranty is 70K.
Keep shopping
Shop all 225/55R18 tires, see every Cooper Tires CS5 Ultra Touring size, or view all tires at ThreePiece.us.
- BRAND:
- Cooper Tires
- Model:
- COO CS5 Ultra Touring
- Size:
- 225/55R18
- Aspect Ratio:
- 55
- Load Index:
- 98
- Load Range:
- SL
- Section Width:
- 225
- Service Description:
- 98H
- Speed Index:
- H
- Temperature:
- A
- Tire Rim Diameter:
- 27.76
- Tire Type:
- Touring
- Traction:
- A
- Tread Wear:
- 640
- Tread Depth:
- 11
- UQTG:
- 640AA
- Warranty:
- 70K
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