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Michelin
Michelin Pilot MXM4 255/45R18XL 103H - 92199
Michelin Pilot MXM4 255/45R18XL 103H - 92199
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The Michelin Pilot MXM4 in 255/45R18 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 255/45R18 means
In the size 255/45R18, 255 is the section width in millimeters (10.04 in), 45 is the aspect ratio — the sidewall stands 45% as tall as the tire is wide, or 114.8 mm (4.52 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 27.04 inches, turning roughly 746 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 103 — a maximum load of 1,929 lbs per tire. The speed symbol H corresponds to a maximum sustained speed of 130 mph.
Load Range E corresponds to a 10-ply rating.
Specifications
| Size | 255/45R18XL |
| Tire Type | All Season |
| Service Description | 103H |
| Load Index | 103 |
| Speed Rating | H |
| Load Range | Extra Load |
| Section Width (mm) | 255 |
| Aspect Ratio | 45 |
| Overall Diameter (in) | 27 |
| Tread Depth (/32") | 10 |
| Treadwear | 300 |
| Traction Grade | A |
| Temperature Grade | A |
| UTQG | 300AA |
| Warranty | 50K |
Frequently asked questions
What does 103H mean on the Michelin Pilot MXM4?
103H breaks down as load index 103 — rated for 1,929 lbs per tire — with an H speed rating, good for a maximum sustained 130 mph.
What kind of tire is the Michelin Pilot MXM4?
The Michelin Pilot MXM4 in 255/45R18 is a all season tire.
What are the treadwear and warranty ratings on the Michelin Pilot MXM4?
This tire carries a treadwear grade of 300, traction grade A, temperature grade A under UTQG. The manufacturer's warranty is 50K.
Keep shopping
Browse Michelin tires, see every Michelin Pilot MXM4 size, or view all tires at ThreePiece.us.
- BRAND:
- Michelin
- Model:
- Pilot MXM4
- Size:
- 255/45R18XL
- Aspect Ratio:
- 45
- Load Index:
- 103
- Load Range:
- Extra Load
- Section Width:
- 255
- Service Description:
- 103H
- Speed Index:
- H
- Temperature:
- A
- Tire Rim Diameter:
- 27
- Tire Type:
- All Season
- Traction:
- A
- Tread Wear:
- 300
- Tread Depth:
- 10
- UQTG:
- 300AA
- Warranty:
- 50K
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