Write a Review
Toyo
Toyo TOY Extensa HP II 245/55R18
Toyo TOY Extensa HP II 245/55R18
📧 Get Fitment Help
Verify parts fit & get product recommendations
Lease-to-own for as low as
/week
Get Started
Guaranteed to Fit — confirm your size with the fitment checker on this page
Price Match Guarantee Learn More
Free Mount & Balance
Free Shipping
OUT OF STOCK 
📧 Get Fitment Help
Verify parts fit & get product recommendations
Shop the Toyo Extensa HP II 245/55R18 at ThreePiece.us — free shipping on every order, Affirm financing available, and fast delivery nationwide.
What 245/55R18 means
In the size 245/55R18, 245 is the section width in millimeters (9.65 in), 55 is the aspect ratio — the sidewall stands 55% as tall as the tire is wide, or 134.8 mm (5.31 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 28.61 inches, turning roughly 705 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 18 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 103 — a maximum load of 1,929 lbs per tire. The speed symbol V corresponds to a maximum sustained speed of 149 mph.
Specifications
| Size | 245/55R18 |
| Tire Type | High-Performance |
| Service Description | 103V |
| Load Index | 103 |
| Speed Rating | V |
| Load Range | SL |
| Section Width (mm) | 245 |
| Aspect Ratio | 55 |
| Overall Diameter (in) | 18 |
| Tread Depth (/32") | 9.6 |
| Treadwear | 500 |
| Traction Grade | A |
| Temperature Grade | A |
| UTQG | 500AA |
| Warranty | 45K |
Frequently asked questions
What are the treadwear and warranty ratings on the Toyo Extensa HP II?
This tire carries a treadwear grade of 500, traction grade A, temperature grade A under UTQG. The manufacturer's warranty is 45K.
What does 103V mean on the Toyo Extensa HP II?
103V breaks down as load index 103 — rated for 1,929 lbs per tire — with a V speed rating, good for a maximum sustained 149 mph.
What kind of tire is the Toyo Extensa HP II?
The Toyo Extensa HP II in 245/55R18 is a high-performance tire.
Keep shopping
Shop all 245/55R18 tires, see every Toyo Extensa HP II size, or view all tires at ThreePiece.us.
- Brand:
- Toyo
- Model:
- TOY Extensa HP II
- Size:
- 245/55R18
- Aspect Ratio:
- 55
- Load Index:
- 103
- Load Range:
- SL
- Section Width:
- 245
- Service Description:
- 103V
- Speed Index:
- V
- Temperature:
- A
- Tire Rim Diameter:
- 18
- Tire Type:
- High-Performance
- Traction:
- A
- Tread Wear:
- 500
- Tread Depth:
- 9.6
- UQTG:
- 500AA
- Warranty:
- 45K
PRODUCT REVIEWS (0)
Overall Rankings
Have you tried this product?
WRITE A REVIEWNo reviews for this product yet. Be the first to write a review!
Write a Review