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Arroyo
Arroyo Eco Pro HT 255/70R18
Arroyo Eco Pro HT 255/70R18
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The Arroyo Eco Pro HT in 255/70R18 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 255/70R18 means
In the size 255/70R18, 255 is the section width in millimeters (10.04 in), 70 is the aspect ratio — the sidewall stands 70% as tall as the tire is wide, or 178.5 mm (7.03 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 32.06 inches, turning roughly 629 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 113 — a maximum load of 2,535 lbs per tire. The speed symbol H corresponds to a maximum sustained speed of 130 mph.
Specifications
| Size | 255/70R18 |
| Tire Type | Passenger |
| Service Description | 113H |
| Load Index | 113 |
| Speed Rating | H |
| Load Range | SL |
| Section Width (mm) | 255 |
| Aspect Ratio | 70 |
| Overall Diameter (in) | 18 |
| Treadwear | 600 |
| Traction Grade | A |
| Temperature Grade | B |
| UTQG | 600 A B |
Frequently asked questions
What does 113H mean on the Arroyo Eco Pro HT?
113H breaks down as load index 113 — rated for 2,535 lbs per tire — with an H speed rating, good for a maximum sustained 130 mph.
What kind of tire is the Arroyo Eco Pro HT?
The Arroyo Eco Pro HT in 255/70R18 is a passenger tire.
What are the treadwear and warranty ratings on the Arroyo Eco Pro HT?
This tire carries a treadwear grade of 600, traction grade A, temperature grade B under UTQG.
Keep shopping
Shop all 255/70R18 tires, see every Arroyo Eco Pro HT size, or view all tires at ThreePiece.us.
- BRAND:
- Arroyo
- Model:
- Eco Pro HT
- Size:
- 255/70R18
- Aspect Ratio:
- 70
- Load Index:
- 113
- Load Range:
- SL
- Section Width:
- 255
- Service Description:
- 113H
- Speed Index:
- H
- Temperature:
- B
- Tire Rim Diameter:
- 18
- Tire Type:
- Passenger
- Traction:
- A
- Tread Wear:
- 600
- Max Load (LB):
- 2535
- UQTG:
- 600 A B
- Side Wall:
- BSW
- Warranty:
- N/A
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