Mastercraft Glacier MSR 275/55R20XL 117T - 177116011

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What 275/55R20 means

In the size 275/55R20, 275 is the section width in millimeters (10.83 in), 55 is the aspect ratio — the sidewall stands 55% as tall as the tire is wide, or 151.2 mm (5.95 in) — R denotes radial construction, and 20 is the wheel diameter in inches. That works out to an overall diameter of about 31.91 inches, turning roughly 632 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 117 — a maximum load of 2,833 lbs per tire. The speed symbol T corresponds to a maximum sustained speed of 118 mph.

Load Range E corresponds to a 10-ply rating.

Specifications

Frequently asked questions

Will 275/55R20 tires fit my vehicle?

Check the size molded into your current tire's sidewall or the tire placard inside the driver's door jamb — if it reads 275/55R20, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right. See every 275/55R20 tire in stock to compare options.

What does 117T mean on the Mastercraft Glacier MSR?

117T breaks down as load index 117 — rated for 2,833 lbs per tire — with a T speed rating, good for a maximum sustained 118 mph.

What kind of tire is the Mastercraft Glacier MSR?

The Mastercraft Glacier MSR in 275/55R20 is a winter tire.

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