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Westlake
Westlake WESTLAKE SU318 245/70R16/4
Westlake WESTLAKE SU318 245/70R16/4
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Shop the Westlake SU318 245/70R16 at ThreePiece.us — free shipping on every order, Affirm financing available, and fast delivery nationwide.
What 245/70R16 means
In the size 245/70R16, 245 is the section width in millimeters (9.65 in), 70 is the aspect ratio — the sidewall stands 70% as tall as the tire is wide, or 171.5 mm (6.75 in) — R denotes radial construction, and 16 is the wheel diameter in inches. That works out to an overall diameter of about 29.50 inches, turning roughly 684 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 manufacturer lists the overall diameter of this specific tire as 16 inches — when clearance is tight, go by the published figure rather than the nominal size math.
The service description on this tire decodes to a load index of 111 — a maximum load of 2,403 lbs per tire. The speed symbol T corresponds to a maximum sustained speed of 118 mph.
Specifications
| Size | 245/70R16/4 |
| Tire Type | High-Performance |
| Service Description | 111T |
| Load Index | 111 |
| Speed Rating | T |
| Load Range | XL |
| Section Width (mm) | 245 |
| Aspect Ratio | 70 |
| Overall Diameter (in) | 16 |
| Tread Depth (/32") | 12 |
| Treadwear | 500 |
| Traction Grade | A |
| Temperature Grade | A |
| UTQG | 500AA |
| Warranty | 50K |
Frequently asked questions
What are the treadwear and warranty ratings on the Westlake SU318?
This tire carries a treadwear grade of 500, traction grade A, temperature grade A under UTQG. The manufacturer's warranty is 50K.
What does 111T mean on the Westlake SU318?
111T breaks down as load index 111 — rated for 2,403 lbs per tire — with a T speed rating, good for a maximum sustained 118 mph.
What kind of tire is the Westlake SU318?
The Westlake SU318 in 245/70R16 is a high-performance tire.
Keep shopping
Shop all 245/70R16 tires, see every Westlake SU318 size, or view all tires at ThreePiece.us.
- BRAND:
- Westlake
- Model:
- WESTLAKE SU318
- Size:
- 245/70R16/4
- Aspect Ratio:
- 70
- Load Index:
- 111
- Load Range:
- XL
- Section Width:
- 245
- Service Description:
- 111T
- Speed Index:
- T
- Temperature:
- A
- Tire Rim Diameter:
- 16
- Tire Type:
- High-Performance
- Traction:
- A
- Tread Wear:
- 500
- Tread Depth:
- 12
- UQTG:
- 500AA
- Warranty:
- 50K
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