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Achilles
Achilles ACH 868 AS 224/40R18
Achilles ACH 868 AS 224/40R18
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Looking for a 224/40R18 highway terrain tire? The Achilles 868 AS is available now at ThreePiece.us with free shipping on every order and Affirm financing at checkout.
What 224/40R18 means
In the size 224/40R18, 224 is the section width in millimeters (8.82 in), 40 is the aspect ratio — the sidewall stands 40% as tall as the tire is wide, or 89.6 mm (3.53 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 25.06 inches, turning roughly 805 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 97 — a maximum load of 1,609 lbs per tire. The speed symbol W corresponds to a maximum sustained speed of 168 mph.
Load Range B corresponds to a 4-ply rating.
Specifications
| Size | 224/40R18 |
| Tire Type | Highway Terrain |
| Service Description | 97W |
| Load Index | 97 |
| Speed Rating | W |
| Load Range | B/4 |
| Section Width (mm) | 224 |
| Aspect Ratio | 40 |
| Overall Diameter (in) | 18 |
| Treadwear | 780 |
| Traction Grade | A |
| Temperature Grade | B |
| UTQG | 780 A B |
Frequently asked questions
What kind of tire is the Achilles 868 AS?
The Achilles 868 AS in 224/40R18 is a highway terrain tire.
What are the treadwear and warranty ratings on the Achilles 868 AS?
This tire carries a treadwear grade of 780, traction grade A, temperature grade B under UTQG.
What does 97W mean on the Achilles 868 AS?
97W breaks down as load index 97 — rated for 1,609 lbs per tire — with a W speed rating, good for a maximum sustained 168 mph.
Keep shopping
See every Achilles 868 AS size, or view all tires at ThreePiece.us.
- BRAND:
- Achilles
- Model:
- ACH 868 AS
- Size:
- 224/40R18
- Aspect Ratio:
- 40
- Load Index:
- 97
- Load Range:
- B/4
- Section Width:
- 224
- Service Description:
- 97W
- Speed Index:
- W
- Temperature:
- B
- Tire Rim Diameter:
- 18
- Tire Type:
- Highway Terrain
- Traction:
- A
- Tread Wear:
- 780
- Tread Depth:
- N/A
- UQTG:
- 780 A B
- Warranty:
- N/A
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