Cooper Discoverer H/T Plus 275/45R20XL 110T - 171058003

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What 275/45R20 means

In the size 275/45R20, 275 is the section width in millimeters (10.83 in), 45 is the aspect ratio — the sidewall stands 45% as tall as the tire is wide, or 123.8 mm (4.87 in) — R denotes radial construction, and 20 is the wheel diameter in inches. That works out to an overall diameter of about 29.74 inches, turning roughly 678 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 110 — a maximum load of 2,337 lbs per tire. The speed symbol T corresponds to a maximum sustained speed of 118 mph.

Specifications

Frequently asked questions

What are the treadwear and warranty ratings on the Cooper Discoverer H/T Plus?

This tire carries a treadwear grade of 460, traction grade A, temperature grade B under UTQG.

What does 110T mean on the Cooper Discoverer H/T Plus?

110T breaks down as load index 110 — rated for 2,337 lbs per tire — with a T speed rating, good for a maximum sustained 118 mph.

What kind of tire is the Cooper Discoverer H/T Plus?

The Cooper Discoverer H/T Plus in 275/45R20 is a all season tire.

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