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Gt Radial
Gt Radial CHAMPIRO HPY 245/45R17
Gt Radial CHAMPIRO HPY 245/45R17
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The Gt Radial CHAMPIRO HPY in 245/45R17 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
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 | 245/45R17 |
| Service Description | 99Y |
| Load Index | 99 |
| Speed Rating | Y |
| Section Width (mm) | 245 |
| Aspect Ratio | 45 |
| Temperature Grade | ATIRE RIM DIAMETER=17TIRE TYPE= TRACTION=AATREAD WEAR=300TREAD DEPTH=UQTG=300 AA AWARRANTY= |
Frequently asked questions
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.
Will 245/45R17 tires fit my vehicle?
Check the size molded into your current tire's sidewall or the tire placard inside the driver's door jamb — if it reads 245/45R17, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right. See every 245/45R17 tire in stock to compare options.
How fast does this tire ship?
Every order at ThreePiece.us ships free, with fast delivery from a nationwide warehouse network. Affirm financing is available at checkout.
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:
- 245/45R17
- ASPECT RATIO:
- 45
- LOAD INDEX:
- 99
- SECTION WIDTH:
- 245
- SERVICE DESCRIPTION:
- 99Y
- SPEED INDEX:
- Y
- TEMPERATURE:
- ATIRE RIM DIAMETER=17TIRE TYPE= TRACTION=AATREAD WEAR=300TREAD DEPTH=UQTG=300 AA AWARRANTY=
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