Cooper Tires COO Discoverer AT3 4S 235/65R17XL

Shop the Cooper Tires Discoverer AT3 4S 235/65R17 at ThreePiece.us — free shipping on every order, Affirm financing available, and fast delivery nationwide.

What 235/65R17 means

In the size 235/65R17, 235 is the section width in millimeters (9.25 in), 65 is the aspect ratio — the sidewall stands 65% as tall as the tire is wide, or 152.8 mm (6.01 in) — R denotes radial construction, and 17 is the wheel diameter in inches. That works out to an overall diameter of about 29.03 inches, turning roughly 695 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 29.21 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 108 — a maximum load of 2,205 lbs per tire. The speed symbol H corresponds to a maximum sustained speed of 130 mph.

Specifications

Frequently asked questions

What are the treadwear and warranty ratings on the Cooper Tires Discoverer AT3 4S?

This tire carries a treadwear grade of 620, traction grade A, temperature grade B under UTQG. The manufacturer's warranty is 65K.

What does 108H mean on the Cooper Tires Discoverer AT3 4S?

108H breaks down as load index 108 — rated for 2,205 lbs per tire — with an H speed rating, good for a maximum sustained 130 mph.

What kind of tire is the Cooper Tires Discoverer AT3 4S?

The Cooper Tires Discoverer AT3 4S in 235/65R17 is a all terrain tire.

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