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Continental
Continental ProContact GX 255/45R20 105H - 15578980000
Continental ProContact GX 255/45R20 105H - 15578980000
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Shop the Continental ProContact GX 255/45R20 at ThreePiece.us — free shipping on every order, Affirm financing available, and fast delivery nationwide.
What 255/45R20 means
In the size 255/45R20, 255 is the section width in millimeters (10.04 in), 45 is the aspect ratio — the sidewall stands 45% as tall as the tire is wide, or 114.8 mm (4.52 in) — R denotes radial construction, and 20 is the wheel diameter in inches. That works out to an overall diameter of about 29.04 inches, turning roughly 695 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 105 — a maximum load of 2,039 lbs per tire. The speed symbol H corresponds to a maximum sustained speed of 130 mph.
Specifications
| Size | 255/45R20 |
| Tire Type | All Season |
| Service Description | 105H |
| Load Index | 105 |
| Speed Rating | H |
| Load Range | XL |
| Section Width (mm) | 255 |
| Aspect Ratio | 45 |
| Overall Diameter (in) | 29.04 |
| Tread Depth (/32") | 9 |
| Treadwear | 500 |
| Traction Grade | A |
| Temperature Grade | A |
| UTQG | 500AA |
| Warranty | 55K |
Frequently asked questions
What are the treadwear and warranty ratings on the Continental ProContact GX?
This tire carries a treadwear grade of 500, traction grade A, temperature grade A under UTQG. The manufacturer's warranty is 55K.
What does 105H mean on the Continental ProContact GX?
105H breaks down as load index 105 — rated for 2,039 lbs per tire — with an H speed rating, good for a maximum sustained 130 mph.
What kind of tire is the Continental ProContact GX?
The Continental ProContact GX in 255/45R20 is a all season tire.
Keep shopping
Shop all 255/45R20 tires, browse Continental tires, see every Continental ProContact GX size, or view all tires at ThreePiece.us.
- BRAND:
- Continental
- Model:
- ProContact GX
- Size:
- 255/45R20
- Aspect Ratio:
- 45
- Load Index:
- 105
- Load Range:
- XL
- Section Width:
- 255
- Service Description:
- 105H
- Speed Index:
- H
- Temperature:
- A
- Tire Rim Diameter:
- 29.04
- Tire Type:
- All Season
- Traction:
- A
- Tread Wear:
- 500
- Tread Depth:
- 9
- UQTG:
- 500AA
- Warranty:
- 55K
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