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Gt Radial
GT Radial Champiro HPY 245/45ZR17XL 99Y - B045
GT Radial Champiro HPY 245/45ZR17XL 99Y - B045
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Looking for a 245/45R17 summer tire? The GT Radial Champiro HPY is available now at ThreePiece.us with free shipping on every order and Affirm financing at checkout.
What 245/45R17 means
In the size 245/45R17, 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 17 is the wheel diameter in inches. That works out to an overall diameter of about 25.68 inches, turning roughly 785 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 | 245/45ZR17XL |
| Tire Type | Summer |
| Service Description | 99Y |
| Load Index | 99 |
| Speed Rating | Y |
| Load Range | XL |
| Section Width (mm) | 245 |
| Aspect Ratio | 45 |
| Overall Diameter (in) | 25.7 |
| Tread Depth (/32") | 10 |
| Treadwear | 300 |
| Traction Grade | AA |
| Temperature Grade | A |
| UTQG | 300AAA |
Frequently asked questions
What kind of tire is the GT Radial Champiro HPY?
The GT Radial Champiro HPY in 245/45R17 is a summer tire.
What are the treadwear and warranty ratings on the GT Radial Champiro HPY?
This tire carries a treadwear grade of 300, traction grade AA, temperature grade A under UTQG.
What does 99Y mean on the GT Radial Champiro HPY?
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.
Keep shopping
Shop all 245/45R17 tires, browse GT Radial tires, see every GT Radial Champiro HPY size, or view all tires at ThreePiece.us.
- BRAND:
- GT Radial
- Model:
- Champiro HPY
- Size:
- 245/45ZR17XL
- Aspect Ratio:
- 45
- Load Index:
- 99
- Load Range:
- XL
- Section Width:
- 245
- Service Description:
- 99Y
- Speed Index:
- Y
- Temperature:
- A
- Tire Rim Diameter:
- 25.7
- Tire Type:
- Summer
- Traction:
- AA
- Tread Wear:
- 300
- Tread Depth:
- 10
- UQTG:
- 300AAA
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