Write a Review
Sumitomo
Sumitomo HTR Z5 255/35R18
Sumitomo HTR Z5 255/35R18
📧 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 255/35R18 tire? The Sumitomo HTR Z5 is available now at ThreePiece.us with free shipping on every order and Affirm financing at checkout.
What 255/35R18 means
In the size 255/35R18, 255 is the section width in millimeters (10.04 in), 35 is the aspect ratio — the sidewall stands 35% as tall as the tire is wide, or 89.2 mm (3.51 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 25.03 inches, turning roughly 806 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 94 — a maximum load of 1,477 lbs per tire. The speed symbol Y corresponds to a maximum sustained speed of 186 mph.
Specifications
| Size | 255/35R18 |
| Service Description | 94Y |
| Load Index | 94 |
| Speed Rating | Y |
| Section Width (mm) | 255 |
| Aspect Ratio | 35 |
| Temperature Grade | TIRE RIM DIAMETER=18TIRE TYPE=TRACTION=TREAD WEAR=TREAD DEPTH=UQTG=WARRANTY= |
Frequently asked questions
Will 255/35R18 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 255/35R18, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right. See every 255/35R18 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 94Y mean on the Sumitomo HTR Z5?
94Y breaks down as load index 94 — rated for 1,477 lbs per tire — with a Y speed rating, good for a maximum sustained 186 mph.
Keep shopping
Shop all 255/35R18 tires, browse Sumitomo tires, see every Sumitomo HTR Z5 size, or view all tires at ThreePiece.us.
- BRAND:
- Sumitomo
- MODEL:
- HTR Z5
- SIZE:
- 255/35R18
- ASPECT RATIO:
- 35
- LOAD INDEX:
- 94
- SECTION WIDTH:
- 255
- SERVICE DESCRIPTION:
- 94Y
- SPEED INDEX:
- Y
- TEMPERATURE:
- TIRE RIM DIAMETER=18TIRE TYPE=TRACTION=TREAD WEAR=TREAD DEPTH=UQTG=WARRANTY=
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