Write a Review
Fullway
Fullway HP108 225/40R18
Fullway HP108 225/40R18
📧 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
The Fullway HP108 in 225/40R18 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 225/40R18 means
In the size 225/40R18, 225 is the section width in millimeters (8.86 in), 40 is the aspect ratio — the sidewall stands 40% as tall as the tire is wide, or 90.0 mm (3.54 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 25.09 inches, turning roughly 804 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 92 — a maximum load of 1,389 lbs per tire. The speed symbol W corresponds to a maximum sustained speed of 168 mph.
Specifications
| Size | 225/40R18 |
| Service Description | 92W |
| Load Index | 92 |
| Speed Rating | W |
| Load Range | XL |
| Section Width (mm) | 225 |
| Aspect Ratio | 40 |
| Temperature Grade | ATIRE RIM DIAMETER=18TIRE TYPE=High PerformanceTRACTION=ATREAD WEAR=380TREAD DEPTH=UQTG=380 A AWARRANTY= |
Frequently asked questions
What does 92W mean on the Fullway HP108?
92W breaks down as load index 92 — rated for 1,389 lbs per tire — with a W speed rating, good for a maximum sustained 168 mph.
Will 225/40R18 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 225/40R18, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right. See every 225/40R18 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 225/40R18 tires, browse Fullway tires, see every Fullway HP108 size, or view all tires at ThreePiece.us.
- BRAND:
- Fullway
- MODEL:
- HP108
- SIZE:
- 225/40R18
- ASPECT RATIO:
- 40
- LOAD INDEX:
- 92
- LOAD RANGE:
- XL
- SECTION WIDTH:
- 225
- SERVICE DESCRIPTION:
- 92W
- SPEED INDEX:
- W
- TEMPERATURE:
- ATIRE RIM DIAMETER=18TIRE TYPE=High PerformanceTRACTION=ATREAD WEAR=380TREAD DEPTH=UQTG=380 A 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