Write a Review
Atlas
Atlas Force UHP 245/45R18
Atlas Force UHP 245/45R18
📧 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
Looking for a 245/45R18 tire? The Atlas Force UHP is available now at ThreePiece.us with free shipping on every order and Affirm financing at checkout.
What 245/45R18 means
In the size 245/45R18, 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 18 is the wheel diameter in inches. That works out to an overall diameter of about 26.68 inches, turning roughly 756 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 100 — a maximum load of 1,764 lbs per tire. The speed symbol Y corresponds to a maximum sustained speed of 186 mph.
Specifications
| Size | 245/45R18 |
| Service Description | 100Y |
| Load Index | 100 |
| Speed Rating | Y |
| Section Width (mm) | 245 |
| Aspect Ratio | 45 |
| Temperature Grade | ATIRE RIM DIAMETER=18TIRE TYPE=TRACTION=AATREAD WEAR=520TREAD DEPTH=UQTG=520 AA AWARRANTY= |
Frequently asked questions
Will 245/45R18 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 245/45R18, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right. See every 245/45R18 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.
What does 100Y mean on the Atlas Force UHP?
100Y breaks down as load index 100 — rated for 1,764 lbs per tire — with a Y speed rating, good for a maximum sustained 186 mph.
Keep shopping
Shop all 245/45R18 tires, browse Atlas tires, see every Atlas Force UHP size, or view all tires at ThreePiece.us.
- BRAND:
- Atlas
- MODEL:
- Force UHP
- SIZE:
- 245/45R18
- ASPECT RATIO:
- 45
- LOAD INDEX:
- 100
- SECTION WIDTH:
- 245
- SERVICE DESCRIPTION:
- 100Y
- SPEED INDEX:
- Y
- TEMPERATURE:
- ATIRE RIM DIAMETER=18TIRE TYPE=TRACTION=AATREAD WEAR=520TREAD DEPTH=UQTG=520 AA AWARRANTY=
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