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Ironman
Ironman All Country HT 4S 255/65R18 111T - 99028.3
Ironman All Country HT 4S 255/65R18 111T - 99028.3
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Looking for a 255/65R18 all season tire? The Ironman All Country HT 4S is available now at ThreePiece.us with free shipping on every order and Affirm financing at checkout.
What 255/65R18 means
In the size 255/65R18, 255 is the section width in millimeters (10.04 in), 65 is the aspect ratio — the sidewall stands 65% as tall as the tire is wide, or 165.8 mm (6.53 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 31.05 inches, turning roughly 650 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 111 — a maximum load of 2,403 lbs per tire. The speed symbol T corresponds to a maximum sustained speed of 118 mph.
Specifications
| Size | 255/65R18 |
| Tire Type | All Season |
| Service Description | 111T |
| Load Index | 111 |
| Speed Rating | T |
| Load Range | Standard Load |
| Section Width (mm) | 255 |
| Aspect Ratio | 65 |
| Overall Diameter (in) | 31.06 |
| Tread Depth (/32") | 11 |
| Treadwear | 600 |
| Traction Grade | A |
| Temperature Grade | B |
| UTQG | 600AB |
| Warranty | 55K |
Frequently asked questions
What kind of tire is the Ironman All Country HT 4S?
The Ironman All Country HT 4S in 255/65R18 is a all season tire.
What are the treadwear and warranty ratings on the Ironman All Country HT 4S?
This tire carries a treadwear grade of 600, traction grade A, temperature grade B under UTQG. The manufacturer's warranty is 55K.
What does 111T mean on the Ironman All Country HT 4S?
111T breaks down as load index 111 — rated for 2,403 lbs per tire — with a T speed rating, good for a maximum sustained 118 mph.
Keep shopping
Shop all 255/65R18 tires, browse Ironman tires, see every Ironman All Country HT 4S size, or view all tires at ThreePiece.us.
- BRAND:
- Ironman
- Model:
- All Country HT 4S
- Size:
- 255/65R18
- Aspect Ratio:
- 65
- Load Index:
- 111
- Load Range:
- Standard Load
- Section Width:
- 255
- Service Description:
- 111T
- Speed Index:
- T
- Temperature:
- B
- Tire Rim Diameter:
- 31.06
- Tire Type:
- All Season
- Traction:
- A
- Tread Wear:
- 600
- Tread Depth:
- 11
- UQTG:
- 600AB
- Warranty:
- 55K
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