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Arroyo
Arroyo Eco Pro HT 235/55ZR18
Arroyo Eco Pro HT 235/55ZR18
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Looking for a 235/55R18 passenger tire? The Arroyo Eco Pro HT is available now at ThreePiece.us with free shipping on every order and Affirm financing at checkout.
What 235/55R18 means
In the size 235/55R18, 235 is the section width in millimeters (9.25 in), 55 is the aspect ratio — the sidewall stands 55% as tall as the tire is wide, or 129.2 mm (5.09 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 28.18 inches, turning roughly 716 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 104 — a maximum load of 1,984 lbs per tire. The speed symbol W corresponds to a maximum sustained speed of 168 mph.
Specifications
| Size | 235/55ZR18 |
| Tire Type | Passenger |
| Service Description | 104W |
| Load Index | 104 |
| Speed Rating | W |
| Load Range | SL |
| Section Width (mm) | 235 |
| Aspect Ratio | 55 |
| Overall Diameter (in) | 18 |
| Treadwear | 600 |
| Traction Grade | A |
| Temperature Grade | B |
| UTQG | 600 A B |
Frequently asked questions
What kind of tire is the Arroyo Eco Pro HT?
The Arroyo Eco Pro HT in 235/55R18 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.
What does 104W mean on the Arroyo Eco Pro HT?
104W breaks down as load index 104 — rated for 1,984 lbs per tire — with a W speed rating, good for a maximum sustained 168 mph.
Keep shopping
Shop all 235/55R18 tires, see every Arroyo Eco Pro HT size, or view all tires at ThreePiece.us.
- BRAND:
- Arroyo
- Model:
- Eco Pro HT
- Size:
- 235/55ZR18
- Aspect Ratio:
- 55
- Load Index:
- 104
- Load Range:
- SL
- Section Width:
- 235
- Service Description:
- 104W
- Speed Index:
- W
- Temperature:
- B
- Tire Rim Diameter:
- 18
- Tire Type:
- Passenger
- Traction:
- A
- Tread Wear:
- 600
- Max Load (LB):
- 1984
- UQTG:
- 600 A B
- Side Wall:
- BSW
- Warranty:
- N/A
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