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Mastercraft
Mastercraft MSC Stratus AP LT275/65R18/10
Mastercraft MSC Stratus AP LT275/65R18/10
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Looking for a 275/65R18 highway tire? The Mastercraft Stratus AP is available now at ThreePiece.us with free shipping on every order and Affirm financing at checkout.
What 275/65R18 means
In the size 275/65R18, 275 is the section width in millimeters (10.83 in), 65 is the aspect ratio — the sidewall stands 65% as tall as the tire is wide, or 178.8 mm (7.04 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 32.07 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 123 — a maximum load of 3,417 lbs per tire, or 120 (3,086 lbs) per tire when mounted as duals. The speed symbol S corresponds to a maximum sustained speed of 112 mph.
Load Range E corresponds to a 10-ply rating.
Specifications
| Size | LT275/65R18/10 |
| Tire Type | Highway |
| Service Description | 123/120S |
| Load Index | 123/120 |
| Speed Rating | S |
| Load Range | E (10 Ply) |
| Section Width (mm) | 275 |
| Aspect Ratio | 65 |
| Overall Diameter (in) | 18 |
| Tread Depth (/32") | 14 |
| Warranty | 50K |
Frequently asked questions
What kind of tire is the Mastercraft Stratus AP?
The Mastercraft Stratus AP in 275/65R18 is a highway tire.
What warranty does the Mastercraft Stratus AP carry?
The manufacturer's warranty on this tire is 50K.
What does 123/120S mean on the Mastercraft Stratus AP?
123/120S breaks down as load index 123 — rated for 3,417 lbs per tire (120, or 3,086 lbs, in dual fitment) — with an S speed rating, good for a maximum sustained 112 mph.
Keep shopping
Shop all 275/65R18 tires, see every Mastercraft Stratus AP size, or view all tires at ThreePiece.us.
- BRAND:
- Mastercraft
- Model:
- MSC Stratus AP
- Size:
- LT275/65R18/10
- Aspect Ratio:
- 65
- Load Index:
- 123/120
- Load Range:
- E (10 Ply)
- Section Width:
- 275
- Service Description:
- 123/120S
- Speed Index:
- S
- Temperature:
- N/A
- Tire Rim Diameter:
- 18
- Tire Type:
- Highway
- Traction:
- N/A
- Tread Wear:
- N/A
- Tread Depth:
- 14
- UQTG:
- N/A
- Warranty:
- 50K
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